|Publication number||US2722970 A|
|Publication date||8 Nov 1955|
|Filing date||2 Jan 1952|
|Priority date||2 Jan 1952|
|Publication number||US 2722970 A, US 2722970A, US-A-2722970, US2722970 A, US2722970A|
|Inventors||Herman H Stechmann|
|Original Assignee||William C Uphoff|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (9), Referenced by (39), Classifications (11)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Nov. 8, 1955 H. H. STECHMANN EXTENSION FOR A TUBULAR CHAIR LEG Filed Jan. 2, 1952 IN VEN TOR.
Ti 1i dm r nnnrvv United States Patent EXTENSION FOR A TUBULAR CHAIR LEG Herman H. Stechmann, Davenport, Iowa, assignor of onehalf to William C. Upholf, Moline, lll.
Application January 2, 1952, Serial No. 264,433
2 Claims. (Cl. 155-88) This invention relates to chairs having tubular legs and has for its object, the provision of means for extending the legs of such chairs to make them usable for small children, so they can eat conveniently and comfortably at a dining table of regular height. These extensions are frictionally held in place within the legs of a chrome chair and, when needed, can be pulled out to their full length and will then be held against return, automatically, in this extended position.
In the drawings annexed hereto and forming a part hereof,
Fig. 1 is a perspective view of a chair with tubular legs such as are commonly termed chrome chairs, the same being shown equipped with leg extensions;
Fig. 2 represents a section taken substantially along the plane indicated by the line 22 in Fig. 1; and
Fig. 3 is an enlarged view of a shell assembly shown in Fig. 2.
The chair as illustrated by Fig. l is provided with hollow legs 1, and in each of these legs is inserted an extension 2. In this extension is formed a plurality of holes in which extensions are inserted spring shells 4 having plungers 6 actuated by springs 5. The inner ends of each of the plungers 6 is provided with a radially outwardly extending flange 7, the diameter of which is approximately the same as, but not larger than, the internal diameter of the shells 4. As will be seen from Fig. 2, portions 8 at the outer ends of the shells 4 overlie the associated flanges 7 and prevent the springs from moving the plungers 6 entirely out of the shells 4, especially in the case of the lowermost plunger 6 in the extension adjustment shown in Fig. 2. When it is desired to reduce the chair to its normal height, the plungers can be pushed into the shells 4, and then the leg ex tensions 2 can be pushed up into the legs 1.
In the lower end of each leg extension 2 is tightly fitted a plug in the nature of a foot 3, which is made, customarily, of very smooth plastic, or of rubber or rubber-like material, to prevent the leg extension 2 from scratching a polished floor. Also, these feet 3, having a greater circumference than that of the leg extensions 2, prevent the leg extensions from going entirely up into the chair legs 1, and which would make it difiicult to withdraw them when it is desired to have the chair higher than originally intended.
As each leg extension 2 is pulled out ready for use, one of the lower plungers 6 protrudes from one of the holes in the leg extension 2 in order to keep the leg extension from slipping too far back into the chair leg 1, while the plunger 6 which is nestled within the chair leg as well as being within the leg extension 2, reacts directly against the inside of the chair leg 1 to keep the leg extension 2 from falling out of the chair leg. By reason of the plurality of plungers 6, it is possible to adjust the height of the chair by diiferent amounts by pulling the leg extension 2 out different distances so that at difierent times different ones of the plungers 6 keep the leg extension 2 projected the desired amount.
It is of course understood that the specific description of structure set forth above may be departed from without departing from the spirit of this invention as disclosed in this specification and as defined by the appended claims.
Having now described my invention, 1 claim:
1. A chair including hollow legs of tubular construction open at their lower ends, a tubular extension for each leg, each extension having an outer diameter substantially the same as the inner diameter of the associated tubular leg, so as to fit slidably but snugly therein, each extension having a plurality of openings in the wall thereof, a plurality of shells secured in the openings, one for each opening, each being a hollow cup-like member closed at its inner end and open at its outer end, the diameter of the outer end being appreciably larger than the diameter of the opening in the associated leg extension, in coaxial relation to the associated opening, and a spring and plunger in each shell, each plunger comprising a hollow part having at its inner end a radially outwardly extending flange abutting against the wall portion surrounding the associated opening to limit the outward movement of the plunger, said spring being positioned between the closed end of the associated shell and the outer end of said plunger, the major portion of the latter lying outwardly of the associated opening in order to be engageable with the lower end of the associated hollow leg for preventing the upward movement of the associated extension relative thereto, the outer end of each plunger being rounded to facilitate manual depression of the plunger into the supporting shell to telescope the leg extension into the associated leg.
2. A chair including hollow legs of tubular construction open at their lower ends, a tubular extension for each leg, each extension having an outer diameter substantially the same as the inner diameter of the associated tubular leg, so as to fit slidably but snugly therein, each extension having a plurality of openings in the wall thereof, a plurality of shells, one for each opening, each being a hollow cup-like member closed at its inner end and open at its outer end, in coaxial relation to the associated opening, a spring and plunger in each shell, each plunger comprising a hollow part having at its inner end a radially outwardly extending flange, and said extension wall having means surrounding each of the openings therein and extending inwardly in a position to engage the flange of the associated plunger to limit the outward movement of the latter, each of said springs being positioned between the closed end of the associated shell and the outer end of said plunger, the major portion of the latter lying outwardly of the associated opening in order to be engageable with the lower end of the associated hollow leg for preventing the upward movement of the associated extension relative thereto.
References Cited in the file of this patent UNITED STATES PATENTS 241,728 Saunders May 17, 1881 942,490 Dunn Dec. 7, 1909 1,039,759 Knight Oct. 1, 1912 1,520,589 Matkovic Dec. 23, 1924 2,329,601 Frye Sept. 14, 1943 2,378,852 James June 19, 1945 2,546,871 Schley Mar. 27, 1951 FOREIGN PATENTS 367,559 France Nov. 5, 1906 570,620 Germany Mar. 6, 1932
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US241728 *||17 May 1880||17 May 1881||Chair|
|US942490 *||4 Dec 1908||7 Dec 1909||William John Dunn||Telescopic article.|
|US1039759 *||18 Jul 1911||1 Oct 1912||Jonathan Lee Knight||Mezzanine-chair.|
|US1520589 *||7 Jun 1923||23 Dec 1924||Chibopbactic posture stool|
|US2329601 *||20 Apr 1942||14 Sep 1943||Harry H Frye||Power transmission means|
|US2378852 *||27 May 1943||19 Jun 1945||Robert H Jamison||Adjustable table and like furniture|
|US2546871 *||22 Apr 1948||27 Mar 1951||Walker Schley Laura||Chair having vertically adjustable footrest|
|DE570620C *||17 Feb 1933||Bruno Knittel||Ausziehrohr, insbesondere fuer Stative|
|FR367559A *||Title not available|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US2854303 *||19 Sep 1957||30 Sep 1958||Mcinnis Neil H||Extensible support for tables|
|US2875008 *||9 May 1955||24 Feb 1959||Herman C Angstreich||Rotatable leg hinge and cover for table|
|US2892647 *||3 May 1954||30 Jun 1959||O'neill Ralph A||Releasable locking mechanism for telescoping members|
|US2917104 *||18 Apr 1957||15 Dec 1959||Martin Richtel||Adjustable chair|
|US2933275 *||4 Nov 1955||19 Apr 1960||Von Wimmersperg Heinrich Ferdi||Extensible, telescoping legs for supports|
|US3006706 *||18 Sep 1959||31 Oct 1961||Metropolis Bending Company||Extensible leg|
|US3043438 *||13 Jun 1960||10 Jul 1962||Chmielewski Jerry H||Clothes pole|
|US3043641 *||26 Sep 1958||10 Jul 1962||De Witt W Hanmore||Adjustable supports|
|US3053298 *||7 Dec 1959||11 Sep 1962||Exchange Bank Mariue National||Golf club separator|
|US3103375 *||7 Apr 1961||10 Sep 1963||Mcmullin Earl L||Telescoping pole|
|US3159855 *||22 Nov 1960||8 Dec 1964||Oakland Corp||Plug inserting mechanism|
|US3164351 *||8 Jan 1962||5 Jan 1965||Leo F Rembowski||Extensible support leg|
|US3246768 *||13 Jun 1963||19 Apr 1966||Sol Rac Inc||Garment storage and display rack|
|US3405972 *||10 May 1967||15 Oct 1968||Charles L. Morris||Stair chair|
|US3622114 *||1 Jul 1969||23 Nov 1971||Mc Donnell Douglas Corp||Pallet assembly|
|US3843996 *||4 Jan 1972||29 Oct 1974||Sobel R||Flexible hinge assembly|
|US3861629 *||23 May 1973||21 Jan 1975||Merrill Walter B||Tree stand|
|US4183317 *||12 Oct 1977||15 Jan 1980||Follick George E||Versatile all purpose barricade structures|
|US4978098 *||1 Sep 1989||18 Dec 1990||Roger Peckinpaugh||Adjustable support|
|US5022617 *||15 Nov 1989||11 Jun 1991||Henderson Robert M||Collapsible valet|
|US5060896 *||6 May 1988||29 Oct 1991||Hobbins John C||Furniture adjustment device|
|US5127647 *||20 Mar 1991||7 Jul 1992||Wilkinson William T||Portable, adjustable exercise step/bench|
|US5291875 *||16 Oct 1992||8 Mar 1994||Modern Home Products Corp.||Adjustable tube assembly for a gas barbecue grill|
|US5333825 *||25 Sep 1992||2 Aug 1994||Christensen Emeron P||Furniture elevating device|
|US5462248 *||21 Jul 1994||31 Oct 1995||Suspa Compart Aktiengesellschaft||Longitudinally adjustable column for chairs, tables or the like|
|US5560573 *||7 Sep 1995||1 Oct 1996||Self-Realization Fellowship Church||Portable detachable meditation armrest support|
|US5899422 *||18 Apr 1997||4 May 1999||Roman Wieland||Adjustable furniture leg extension|
|US6290628 *||20 Dec 1995||18 Sep 2001||William T. Wilkinson||Aerobic climbing step/bench device|
|US6467747 *||14 Jan 2000||22 Oct 2002||Western Highway Products, Inc.||Breakaway signpost|
|US7344117 *||30 Dec 2005||18 Mar 2008||Benq Corporation||Adjustable lift support apparatus|
|US7631604 *||15 Dec 2009||Tsung-Chieh Huang||Telescopic and foldable table|
|US7722283 *||29 Sep 2006||25 May 2010||The Hong Kong Polytechnic University||Bollard with connecting mechanisms for connecting railings|
|US8979185||18 Aug 2014||17 Mar 2015||Ray H. Redel||Two-position folding chair|
|US20060175512 *||30 Dec 2005||10 Aug 2006||Beno Corporation||Adjustable lift support apparatus|
|US20070256611 *||8 May 2006||8 Nov 2007||Tsung-Chieh Huang||Telescopic and foldable table|
|US20080075530 *||29 Sep 2006||27 Mar 2008||The Hong Kong Polytechnic University||Bollard with connecting mechanisms for connecting railings|
|DE2747777A1 *||25 Oct 1977||26 Apr 1979||Kirschbaum Albrecht Von||Supporting frame for chair - consists of hub with hole into which fits tubular column, with legs attached to hub|
|DE4319125A1 *||9 Jun 1993||15 Dec 1994||Hartman Groep Bv||Piece of standing furniture with length-adjustable legs and supporting feet permitting the length-adjustability|
|WO2006040504A1 *||14 Sep 2005||20 Apr 2006||Philip Nixon||An improved furniture raiser|
|U.S. Classification||248/188.2, 5/311, 403/107, 248/408, 16/DIG.390|
|Cooperative Classification||A47B91/02, A47C3/26, Y10S16/39|
|European Classification||A47C3/26, A47B91/02|