CA2012399C - A safety device for shielding off the receptacles of an electric current tap - Google Patents
A safety device for shielding off the receptacles of an electric current tap Download PDFInfo
- Publication number
- CA2012399C CA2012399C CA002012399A CA2012399A CA2012399C CA 2012399 C CA2012399 C CA 2012399C CA 002012399 A CA002012399 A CA 002012399A CA 2012399 A CA2012399 A CA 2012399A CA 2012399 C CA2012399 C CA 2012399C
- Authority
- CA
- Canada
- Prior art keywords
- shutter member
- portions
- tap
- receptacles
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/46—Bases; Cases
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/44—Means for preventing access to live contacts
- H01R13/447—Shutter or cover plate
- H01R13/453—Shutter or cover plate opened by engagement of counterpart
- H01R13/4534—Laterally sliding shutter
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/44—Means for preventing access to live contacts
Abstract
A safety device for shielding off the receptacles of an electric current tap comprises a shutter member guided for sliding movement inside the tap body against the bias of a spring means between tap holes intended for receiving pins of an electric plug and the tap receptacles. The shutter member is accommodated within the current tap in tilting support relationship with a back wall of said tap body comprising two oppositely pitched surfaces set at a slight inclination angle, means being arranged to block the shutter member against sliding on a portion thereof being thrust against one of the surfaces.
Description
DLCCi,.TfTIO
This invention relates to a safety device for shielding off the receptacles o.f an electric current tap or socket, being of a type which comprises a shutter member guided for sliding movement within a tap body against the bias of a spring means bet~neen holes intended to receive pins of an electric plug and said receptacles, As is well known, many countries enforce safety regulations requiring- that these devices only make the receptacles of a current tap accessible zahen the pins of a Plug are inserted into the tap simultaneously, :evident is, therefore, the need fo.r manufacturers o.f electrical eduipment to coxlf'or.~ vai~th such re~;ulata.ons h~~ the provision of devices which are practical, effective, and low i.n cost, The prior art proposes, .for instance, devices which comprise a shutter member interposed bettyeen the holes and the receptacles of a current tap. The shutter member a s guided, either for a ~translatory or rotary movement, insic9e the tap body and aUainst tl~e bias of elastic mean;;, sGach that: it can be shifted fror.: a first position vaher a it shuts off the current. tap boles to a seconci posii::i.on zshere free access is given to the receptacles of the tap.
1:'ith time, sazc.lv larior art devices have shown to ~c,~~.~99 be ,mez~zerally unreliable. In particul<~~~r, it may be shown that the incidental introduction of a pointed or flat object through one of the holes frequently results in seizure of the device, whereby its safeguarding function, as provided by the regulatory body, is lost and the pointed object allowed to reach the live interior of the tap, This problem is the more acute where the pointed object happens to be one of the knifo pins of a so-called "American" plug.
Other shortcomings of such prior devices are their complicated design and. that; they require special acre during assembling, All this reflects in increased cost of the device, tvhicl: i;oes against tho requisite ability to produce it in large volumas at low costs, possibly by the use of automated assembly proceduros, The technical prob:Lem that underlies this invention is to provide a novel type of sa...i'ety device for shielding off the receptacles of an electric current tap or socket tvhich has such structural and por:forma,nco chax~acteristics as to resist the forcible introduction of a pointed objoct, thz~ough just one of the current tap holes, said devise havin;; a peculiarly simple construction an<l a xeduaed z°rezmber of component p~..rts so a: to abv:iate the clra~ub~cks noted hereinabove in connhctioz7 v~.ith the prior a x't , This problem is solved by a device as indicated being characterized in that sa id shutter member is housed within the electric current tap in tilting support relationship with a buck wall of said body comprising two oppositely pitched surf aces at slight inclination angles, a means being- provided of blocking the sliding movement of the shutter member on a portion thereof being brought to bear on one of said surfaces.
In a preferred embodiment, each portion lxas a ramp-lilce incline constitutin L a lead-in for its corresponding plug pin, and is formed integrally with a, rod, ~taherewith said corresponding portion is also inteUral in a subst~.:.tial.'.y lwlilcr configuration.
'I'he features and ~dva.ntages of a device accordin;; to the invention twill become apparent .from the followinU
detailed descrir~t:ian of un em~sodimezlt thereof, ~,aven by way of illustratiozx and not of limitation vaitlz reference to the accompanying drawings.
7:n the draz:W n,~s P'igure 1 is an ex~:>loded perspective view of an electric current tap incorlsoratin~ the inventive device;
1~ figure ? is an ~>xploded perspective view of l,he device of this invention; and !:~'igures j to 5 ,Zx~e x~esisec;:ivc ~:idc views, im section, of the current tap sl~owm izn 1~ i,,urc~ 1 at. different stages of it;a operation.
_ y -.
!:'ith reference to the dravring views, generally indicated at 1 is a safety device for shielding off the receptacles, not shoWll because conventional, of an electric current tap or socket 2, In the exemplaryr embodiment discussed herein, the electric current tap z is of a universal type a.n the sense that its holes g can both accommodate plug pins 12 of circular cross-section from an electric plug 11 of the European type and flat pins from a so-called "American" plug, not shoran because conventional, The current tap 2 comprises a body 3 of the tap of essentially box-like design, housing the device 1 including a shutter member 10 which is guided for sliding movement inside said tap body j"
Tap Voles 9 of the current tap 2 are formed on a structurally independent sur:('a.ce po;rt:Lon -''~ which is a snap fit onto aloe tap body a to act as a cover therefor.
At eacl: hole 9, the shutter member has paired portions 5 and G which are constantly urged to abut each other by an elastic means t~.
These portions j and G are also guided slidably in the L~ody .~ to move: a~~~ay from each other against that same elasi;~.c moans i;.
l~:ach r.>ox~tton ~ associated ~ait!~ one of the holes is parallel and ritridly connected to t:he portion G
corresr~ondin,;ly associated with 'the other hole of the current tap '', For the purpose, a rod member '~( is provided perpendicularly to have said portions formed integral therewith and parallel to one another into an F-like configuration, Each portion, j and 6, is provided with an incline of its own, as indicated at 13 and 11E, respectively, said inclines forming a lead-in for the insertion of a corresponding plug pin 1z, The portions ~ and 6 differ from eacl; other essentially by the width of their respective ramp-like inclines, The portions 5 and 6, a~~d tlaeir related rod 7, form in combination an assembly, indicated at 15r tahiel; constitutes saicl sloutter member 10 in cooperation with a second liko assembly 1a.
The a;;semblies 15 aro interleaved toUether such that the free ends 1 G and 17 of their corresponding portions ~ and G on one assembly 15 will bear slidingly on respective sections 1u and 1~ of the rod 7 on the other assombl)r 1 > .
Thus, a.he shutter member 10 is assembled faith the Portions G laid b~cl:-to-baal~. centrally o:C the tap and v;ith the pori:ions ~ extending at cliame~trically orposite reriPhc~.ral loci Lions, The el;:stic means t~ consists o:C a. cylinQrical coil _ G _ 2~~.~3~~
spring which is housed in the tap body 3 centrally of the latter and in a pxe~loaded state with its opposed ends 21 received in corresponding sockets 22 formed centrally in each portion G on the remote side from the ramp 14, Advantageously, within the tap body 3 , the shutter member 10 bears on a bank wall 27 defined by two oppositely pitched surfaces 23 and 24 which are set at a slight inclination angle and radiused cexztrally, The shutter member 10 receives tilting support at the spring ?0 along a line of morger between the two surfaces 23 and 2~~, >;ach surface ~ ~3 ar 'lE' slopos dotun toward the periphery of the tap body j ~ and huu moans arranged at its erzd section for blocking the sliding movement of the shutter momber 10 as a r~ort3on of the latter ~.s pushed to leer on ono of the surfaces, 23 or f?~~, Sucl. me~~ns consist o:C respective stepped ledges indicates at 2~ and ?G' which are formed integrally with the bacl~ wall 27, ',then the pins 1 %_' of the plug 1 1 are inserted simultaneously thr ougla the holes in the current tap 2 by a movement in the direction of the straw I~ , as shoran in 1'i,~;ure ~, they will concurrently exert a pressure on the ramps 1 ~3 and 1 ~'E of each pair of confronting partions ~, and G~ farcinm them apart and allowin,; them to mave awa~tr from each other ai;ainst the bias of the sprang Z0, 'i'he portiouzs ~ 4nd U fast veith each assembly 1~
~~~a~~~
are guided for sliding movement along the same direction, f1 or f2, by contrast, should an improper act be performed with some sharp pointed object, such as might result in one of the tap receptacles being reached through a single tap hole as shoran in fif;-ure j, the thrust force applied through the object would cause a corresponding portion of 'the shutter member to tilt against one of tl.~e sloping surfaces 23 or 21~, but with the end of that portion abutted on its corresponding stepped ledge , 25 or 26; Accarding'ly, the thrust farce being applied by the sharp pointed object to the ramps 13 and 1tE
will result in no displacement of the shutter member held against its ledge as shown in figure 'l'lae inventive device has proved suite effective to z~esist the insnrt~.oaz of a paimted and/or flat abjeot throu~la one only of the current tap holes, This device has a major advantage, r.~oreover, in that its COnStruction is simple and easily assembled suci: that: the device can be assembled using automated eduipment,
This invention relates to a safety device for shielding off the receptacles o.f an electric current tap or socket, being of a type which comprises a shutter member guided for sliding movement within a tap body against the bias of a spring means bet~neen holes intended to receive pins of an electric plug and said receptacles, As is well known, many countries enforce safety regulations requiring- that these devices only make the receptacles of a current tap accessible zahen the pins of a Plug are inserted into the tap simultaneously, :evident is, therefore, the need fo.r manufacturers o.f electrical eduipment to coxlf'or.~ vai~th such re~;ulata.ons h~~ the provision of devices which are practical, effective, and low i.n cost, The prior art proposes, .for instance, devices which comprise a shutter member interposed bettyeen the holes and the receptacles of a current tap. The shutter member a s guided, either for a ~translatory or rotary movement, insic9e the tap body and aUainst tl~e bias of elastic mean;;, sGach that: it can be shifted fror.: a first position vaher a it shuts off the current. tap boles to a seconci posii::i.on zshere free access is given to the receptacles of the tap.
1:'ith time, sazc.lv larior art devices have shown to ~c,~~.~99 be ,mez~zerally unreliable. In particul<~~~r, it may be shown that the incidental introduction of a pointed or flat object through one of the holes frequently results in seizure of the device, whereby its safeguarding function, as provided by the regulatory body, is lost and the pointed object allowed to reach the live interior of the tap, This problem is the more acute where the pointed object happens to be one of the knifo pins of a so-called "American" plug.
Other shortcomings of such prior devices are their complicated design and. that; they require special acre during assembling, All this reflects in increased cost of the device, tvhicl: i;oes against tho requisite ability to produce it in large volumas at low costs, possibly by the use of automated assembly proceduros, The technical prob:Lem that underlies this invention is to provide a novel type of sa...i'ety device for shielding off the receptacles of an electric current tap or socket tvhich has such structural and por:forma,nco chax~acteristics as to resist the forcible introduction of a pointed objoct, thz~ough just one of the current tap holes, said devise havin;; a peculiarly simple construction an<l a xeduaed z°rezmber of component p~..rts so a: to abv:iate the clra~ub~cks noted hereinabove in connhctioz7 v~.ith the prior a x't , This problem is solved by a device as indicated being characterized in that sa id shutter member is housed within the electric current tap in tilting support relationship with a buck wall of said body comprising two oppositely pitched surf aces at slight inclination angles, a means being- provided of blocking the sliding movement of the shutter member on a portion thereof being brought to bear on one of said surfaces.
In a preferred embodiment, each portion lxas a ramp-lilce incline constitutin L a lead-in for its corresponding plug pin, and is formed integrally with a, rod, ~taherewith said corresponding portion is also inteUral in a subst~.:.tial.'.y lwlilcr configuration.
'I'he features and ~dva.ntages of a device accordin;; to the invention twill become apparent .from the followinU
detailed descrir~t:ian of un em~sodimezlt thereof, ~,aven by way of illustratiozx and not of limitation vaitlz reference to the accompanying drawings.
7:n the draz:W n,~s P'igure 1 is an ex~:>loded perspective view of an electric current tap incorlsoratin~ the inventive device;
1~ figure ? is an ~>xploded perspective view of l,he device of this invention; and !:~'igures j to 5 ,Zx~e x~esisec;:ivc ~:idc views, im section, of the current tap sl~owm izn 1~ i,,urc~ 1 at. different stages of it;a operation.
_ y -.
!:'ith reference to the dravring views, generally indicated at 1 is a safety device for shielding off the receptacles, not shoWll because conventional, of an electric current tap or socket 2, In the exemplaryr embodiment discussed herein, the electric current tap z is of a universal type a.n the sense that its holes g can both accommodate plug pins 12 of circular cross-section from an electric plug 11 of the European type and flat pins from a so-called "American" plug, not shoran because conventional, The current tap 2 comprises a body 3 of the tap of essentially box-like design, housing the device 1 including a shutter member 10 which is guided for sliding movement inside said tap body j"
Tap Voles 9 of the current tap 2 are formed on a structurally independent sur:('a.ce po;rt:Lon -''~ which is a snap fit onto aloe tap body a to act as a cover therefor.
At eacl: hole 9, the shutter member has paired portions 5 and G which are constantly urged to abut each other by an elastic means t~.
These portions j and G are also guided slidably in the L~ody .~ to move: a~~~ay from each other against that same elasi;~.c moans i;.
l~:ach r.>ox~tton ~ associated ~ait!~ one of the holes is parallel and ritridly connected to t:he portion G
corresr~ondin,;ly associated with 'the other hole of the current tap '', For the purpose, a rod member '~( is provided perpendicularly to have said portions formed integral therewith and parallel to one another into an F-like configuration, Each portion, j and 6, is provided with an incline of its own, as indicated at 13 and 11E, respectively, said inclines forming a lead-in for the insertion of a corresponding plug pin 1z, The portions ~ and 6 differ from eacl; other essentially by the width of their respective ramp-like inclines, The portions 5 and 6, a~~d tlaeir related rod 7, form in combination an assembly, indicated at 15r tahiel; constitutes saicl sloutter member 10 in cooperation with a second liko assembly 1a.
The a;;semblies 15 aro interleaved toUether such that the free ends 1 G and 17 of their corresponding portions ~ and G on one assembly 15 will bear slidingly on respective sections 1u and 1~ of the rod 7 on the other assombl)r 1 > .
Thus, a.he shutter member 10 is assembled faith the Portions G laid b~cl:-to-baal~. centrally o:C the tap and v;ith the pori:ions ~ extending at cliame~trically orposite reriPhc~.ral loci Lions, The el;:stic means t~ consists o:C a. cylinQrical coil _ G _ 2~~.~3~~
spring which is housed in the tap body 3 centrally of the latter and in a pxe~loaded state with its opposed ends 21 received in corresponding sockets 22 formed centrally in each portion G on the remote side from the ramp 14, Advantageously, within the tap body 3 , the shutter member 10 bears on a bank wall 27 defined by two oppositely pitched surfaces 23 and 24 which are set at a slight inclination angle and radiused cexztrally, The shutter member 10 receives tilting support at the spring ?0 along a line of morger between the two surfaces 23 and 2~~, >;ach surface ~ ~3 ar 'lE' slopos dotun toward the periphery of the tap body j ~ and huu moans arranged at its erzd section for blocking the sliding movement of the shutter momber 10 as a r~ort3on of the latter ~.s pushed to leer on ono of the surfaces, 23 or f?~~, Sucl. me~~ns consist o:C respective stepped ledges indicates at 2~ and ?G' which are formed integrally with the bacl~ wall 27, ',then the pins 1 %_' of the plug 1 1 are inserted simultaneously thr ougla the holes in the current tap 2 by a movement in the direction of the straw I~ , as shoran in 1'i,~;ure ~, they will concurrently exert a pressure on the ramps 1 ~3 and 1 ~'E of each pair of confronting partions ~, and G~ farcinm them apart and allowin,; them to mave awa~tr from each other ai;ainst the bias of the sprang Z0, 'i'he portiouzs ~ 4nd U fast veith each assembly 1~
~~~a~~~
are guided for sliding movement along the same direction, f1 or f2, by contrast, should an improper act be performed with some sharp pointed object, such as might result in one of the tap receptacles being reached through a single tap hole as shoran in fif;-ure j, the thrust force applied through the object would cause a corresponding portion of 'the shutter member to tilt against one of tl.~e sloping surfaces 23 or 21~, but with the end of that portion abutted on its corresponding stepped ledge , 25 or 26; Accarding'ly, the thrust farce being applied by the sharp pointed object to the ramps 13 and 1tE
will result in no displacement of the shutter member held against its ledge as shown in figure 'l'lae inventive device has proved suite effective to z~esist the insnrt~.oaz of a paimted and/or flat abjeot throu~la one only of the current tap holes, This device has a major advantage, r.~oreover, in that its COnStruction is simple and easily assembled suci: that: the device can be assembled using automated eduipment,
Claims (17)
1. A safety device for shielding off the receptacles of an electric current tap or socket, being of a type which comprises a shutter member guided for sliding movement within a tap body against the bias of a spring means between holes intended to receive pins of an electric plug and said receptacles, characterized in that said shutter member is housed within the electric current tap in tilting support relationship with a back wall of said body comprising two oppositely pitched surfaces at slight inclination angles, a means being provided of blocking the sliding movement of the shutter member on a portion thereof being brought to bear on one of said surfaces.
2. A device according to claim 1, characterized in that said means comprises respective stepped ledges formed integrally with said wall at the opposed extremities of said surfaces.
3. A device according to claim 1, characterized in that said shutter member comprises, located at each tap hole, a pair of portions constantly urged to abut each other and being guided for sliding movement away from each other against the bias of said means, each portion being rigidly connected to its corresponding portion associated with the other tap hole.
4. A device according to claim 3, characterized in that each of said portions has a corresponding ramp-like incline, and that inclines of each portion pair face each other into a lead-in for a corresponding pin of said electric plug.
5. A device according to claim 3, characterized in that said portions are each formed integrally with a rod into an essentially F-like configuration, the corresponding portions with each tap hole being formed on the same rod.
6. A device according to claim 5, characterized in that said portions constitute, in combination with their respective rod, a first assembly adapted to cooperate with a second assembly having a similar construction wherewith it is interleaved to define said shutter member.
7. A device according to claim 6, characterized in that said assemblies are interleaved, and have the free ends of the corresponding portions in each assembly arranged to bear slidingly on respective sections of the rod in the other assembly.
8. A device according to claim 3, characterized in that said spring means consists of a cylindrical coil spring housed in a pre-loaded state centrally of the tap body with its opposed ends fitting into corresponding sockets formed in the portions lying back-to-back.
9. A safety device for shielding off the receptacles of an electric current socket comprising a body and means defining holes forwardly of said body and in alignment with said receptacles for receiving pins of an electrical plug, a shutter member mounted for sliding movement within said body at a location between said holes and said receptacles, spring means for biasing said shutter member against said sliding movement, said body having a back wall with two oppositely pitched surfaces at slight inclination angles, said shutter member being supported by said body for relative tilting movement with respect to said back wall pitched surfaces, and means for blocking sliding movement of said shutter member when a portion of the shutter member is brought to bear on one of said pitched surfaces.
10. A device according to claim 9 in which said blocking means comprises respective stepped ledges formed integrally with said back wall at the opposed extremities of said pitched surfaces.
11. A device according to claim 9 in which said hole defining means is a cover removably mountable on a front side of said body.
12. A device according to claim 9 in which said shutter member comprises, located at each said hole, a pair of portions constantly urged to abut each other and which are guided for sliding movement away from each other against the bias of said spring means, each said portion being rigidly connected to its corresponding portion associated with the other said hole.
13. A device according to claim 12 in which each of said portions has a corresponding ramp-like incline, and said inclines of each portion pair face each other into a lead-in for a corresponding pin of said electric plug.
14. A device according to claim 12 in which said spring means consists of a cylindrical coil spring housed in a pre-loaded state centrally of the body with its opposed ends fitting into corresponding sockets formed in portions lying back-to-back.
15. A device according to claim 12 in which said portions are each formed integrally with a rod into an essentially F-like configuration, the corresponding portions with each tap hole being formed on the same rod.
16. A device according to claim 15 in which said portions constitute, in combination with their respective rod, a first assembly adapted to cooperate with their respective rod, a first assembly adapted to cooperate with a second assembly having a similar construction wherewith it is interleaved to define said shutter member.
17. A device according to claim 16 in which said assemblies are interleaved and have the free ends of the corresponding portions in each assembly arranged to bear slidingly on respective sections of the rod in the other assembly.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT21100-A/89 | 1989-07-05 | ||
| IT8921100A IT1230054B (en) | 1989-07-05 | 1989-07-05 | SAFETY DEVICE FOR THE PROTECTION OF THE CELLS OF AN ELECTRIC POWER OUTLET. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2012399A1 CA2012399A1 (en) | 1991-01-05 |
| CA2012399C true CA2012399C (en) | 2000-05-02 |
Family
ID=11176741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002012399A Expired - Fee Related CA2012399C (en) | 1989-07-05 | 1990-03-16 | A safety device for shielding off the receptacles of an electric current tap |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US5020997A (en) |
| KR (1) | KR100217768B1 (en) |
| AR (1) | AR242321A1 (en) |
| BR (1) | BR9002593A (en) |
| CA (1) | CA2012399C (en) |
| IT (1) | IT1230054B (en) |
| MX (1) | MX172844B (en) |
| PE (1) | PE11091A1 (en) |
| SA (1) | SA90100270B1 (en) |
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| IT1283365B1 (en) * | 1996-07-30 | 1998-04-17 | Bticino Spa | SHUTTER DEVICE OF CELLS OF A CURRENT SOCKET |
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| US9196995B2 (en) | 2013-12-19 | 2015-11-24 | Hubbell Incorporated | Tamper resistant mechanism for 15 and 20 amp electrical receptacles |
| US9502806B2 (en) * | 2014-06-20 | 2016-11-22 | Hubbell Incorporated | Tamper resistant receptacle shutter with friction reducing lead in configuration |
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| US9847611B2 (en) * | 2014-10-14 | 2017-12-19 | Pass & Seymour, Inc. | Electrical wiring device with shutters |
| US10141674B2 (en) | 2016-06-09 | 2018-11-27 | Hubbell Incorporated | Tamper resistant mechanism for electrical wiring devices |
| CA3105633A1 (en) | 2018-07-06 | 2020-01-09 | Hubbell Incorporated | Tamper resistant mechanism for electrical wiring devices |
| CA3082605A1 (en) | 2019-06-08 | 2020-12-08 | Norman R. Byrne | Electrical receptacle with drain-through feature |
| CN112038812B (en) * | 2020-09-04 | 2022-02-22 | 成都阿尔刚雷绝缘连电插座制造有限公司 | Safety protection device |
| CN112864681A (en) * | 2021-01-12 | 2021-05-28 | 温州职业技术学院 | Intelligent socket for Internet of things |
| US11469535B1 (en) * | 2021-04-07 | 2022-10-11 | Eaton Intelligent Power Limited | Automation compatible spring assisted single part tamper resistant shutter mechanism for wiring device product |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3238492A (en) * | 1964-01-16 | 1966-03-01 | Hubbell Inc Harvey | Safety electric receptacle |
| US4379607A (en) * | 1980-10-06 | 1983-04-12 | Slater Electric Inc. | Shuttered receptacle |
| US4544219A (en) * | 1984-06-01 | 1985-10-01 | Harvey Hubbell Incorporated | Shuttered electrical receptacle |
| US4822290A (en) * | 1986-05-30 | 1989-04-18 | Cauley William J | Electric receptacle |
| US4722693A (en) * | 1987-03-30 | 1988-02-02 | Friedhelm Rose | Safety shutters for electrical receptacles |
| US4867693A (en) * | 1988-08-01 | 1989-09-19 | General Electric Company | Safety electrical tap |
| US4867694A (en) * | 1988-08-01 | 1989-09-19 | General Electric Company | Safety electrical receptacle |
-
1989
- 1989-07-05 IT IT8921100A patent/IT1230054B/en active
-
1990
- 1990-03-16 CA CA002012399A patent/CA2012399C/en not_active Expired - Fee Related
- 1990-03-22 MX MX019991A patent/MX172844B/en unknown
- 1990-03-27 AR AR90316466A patent/AR242321A1/en active
- 1990-03-30 PE PE1990167111A patent/PE11091A1/en not_active Application Discontinuation
- 1990-04-05 US US07/504,924 patent/US5020997A/en not_active Expired - Lifetime
- 1990-04-18 KR KR1019900005398A patent/KR100217768B1/en not_active IP Right Cessation
- 1990-05-31 BR BR909002593A patent/BR9002593A/en not_active IP Right Cessation
- 1990-06-06 SA SA90100270A patent/SA90100270B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US5020997A (en) | 1991-06-04 |
| CA2012399A1 (en) | 1991-01-05 |
| IT8921100A0 (en) | 1989-07-05 |
| KR910003864A (en) | 1991-02-28 |
| AR242321A1 (en) | 1993-03-31 |
| BR9002593A (en) | 1991-08-20 |
| MX172844B (en) | 1994-01-17 |
| IT1230054B (en) | 1991-09-27 |
| KR100217768B1 (en) | 1999-09-01 |
| PE11091A1 (en) | 1991-04-11 |
| SA90100270B1 (en) | 2003-02-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |