US3768934A - Apparatus for continuously conveying semisolid material by the action of circulating squeeze rollers on a flexible conduit for the material - Google Patents

Apparatus for continuously conveying semisolid material by the action of circulating squeeze rollers on a flexible conduit for the material Download PDF

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US3768934A
US3768934A US00234541A US3768934DA US3768934A US 3768934 A US3768934 A US 3768934A US 00234541 A US00234541 A US 00234541A US 3768934D A US3768934D A US 3768934DA US 3768934 A US3768934 A US 3768934A
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tube
ribs
squeeze rollers
set forth
conveying
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US00234541A
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O Magerle
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TUKIEM TRUST
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TUKIEM TRUST
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/0009—Special features
    • F04B43/0054—Special features particularities of the flexible members
    • F04B43/0072—Special features particularities of the flexible members of tubular flexible members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B43/00—Machines, pumps, or pumping installations having flexible working members
    • F04B43/12—Machines, pumps, or pumping installations having flexible working members having peristaltic action
    • F04B43/1253—Machines, pumps, or pumping installations having flexible working members having peristaltic action by using two or more rollers as squeezing elements, the rollers moving on an arc of a circle during squeezing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps
    • Y10S417/90—Slurry pumps, e.g. concrete

Definitions

  • An elastic flexible conveying tube has a length portion provided on the outside with ribs.
  • Revolvable squeeze rollers are movable along said length portion in engagement therewith and have teeth adapted to mesh with said ribs.
  • Such apparatus can well eliminate part of the disadvantages of the known equipment in which mortar or the like is conveyed by piston pumps.
  • the disadvantages of equipment which uses piston pumps are due to the fact that the conveyance is intermittently effected by pistons having a short stroke and with an occurrence of extremely high pressure.
  • Ball valves are required on the suction side and discharge side.
  • Such equipment inevitably involves a segregation of the aggregates and mixing water because mixed lime or cement mortar is susceptible to impacts. If the valves are not tight, the intermittent application of pressure to the mixing water forces the latter back into the stirring trough before the mixture enters the conveying line so that the mortar increases progressively in stiffness and eventually clogs the conveying line. The hard aggregates of the mortar soon cause the ball valves to leak.
  • a great disadvantage resides in that a continuous conveyance is not enabled and cannot be enabled even by a succeeding pressureequalizing air chamber. Besides, the contact of the mortar with metallic structures should be minimized because it tends to deposit thereon. Finally, the use of piston pumps and ball valves has the disadvantage that the flow of the mortar cannot be slowed down because the mortar cannot be sucked if the speed of the piston is too low.
  • the known apparatus for conveying mortar and the like by means of an elastic, flexible conveying tube and revolvable squeeze rollers acting on said tube have the disadvantage that the squeeze rollers slip off the conveying tube and tend to pull the same along in their direction of revolution during the conveyance so that a satisfactory continuous conveyance is not enabled by these apparatus.
  • the invention teaches to provide ribs on the outside of the conveying tube and to provide the squeeze rollers with teeth adapted to mesh with said ribs.
  • the invention prevents a slipping of the squeeze rollers from the conveying tube and the latter can be held fast in the apparatus by the ribs in such a manner that the squeeze roller cannot pull the tube along during the conveyance.
  • the provision of ribs on the conveying tube has the further advantage that the tube when squeezed together can open more easily to receive the material being handled.
  • the internal cross-section of the conveying tube tapers in the direction of conveyance.
  • the conveying tube is stiffened by longitudinal ribs outside the tube portion which is engageable by the squeeze rollers.
  • FIG. 1 is-a vertical sectional view taken through the apparatus. 1
  • FIG. 2 is a longitudinal sectional view showing a detail
  • FIG. 3 is a transverse sectional view thereof.
  • the apparatus for continuously conveying mortar or the like comprises a housing 1, in which a'spider 2 provided with a drive shaft 5 is rotatably mounted. Squeeze rollers 4 are mounted with b'earings 3 on the spider 2 and cooperate with a flexible conveying tube 6.
  • the conveying tube 6 is provided on the outside with ribs 7, which extend around the tube.
  • the squeeze rollers carry teeth 8, which cooperate with these ribs 7.
  • the conveying tube is provided with longitudinal ribs 9 outside that portion of the tube which is engageable by the squeeze rollers 4.
  • the conveying tube is shown in a longitudinal sectional view in FIG. 2 and in a transverse sectional view in FIG. 3. It is apparent from FIG. 2 that the conveying tube has a slight taper in the direction of conveyance.
  • the conveying tube 6 is concentric to the axis of rotation of the spider and is supported in the housing 1 on a bed 10 of elastic material
  • the ribs 7 prevent a displacement of the conveying tube 6 in the direction of revolution.
  • the conveying tube 6 is connected by quick-action couplings 11 to a feed pipe 12 and a discharge pipe 13.
  • the mortar to be conveyed is mixed in a trough 14.
  • a stirrer 15 is operated to prevent a segregation of the mixed mortar.
  • the spider 2 is provided with rotatably mounted bellcrank levers, which serve to move the squeeze rollers toward the conveying tube.
  • One arm 16' of each bellcrank lever is formed with a longitudinal slot 21 which receives a pin 20 mounted on the bearing 3 of a squeeze roller.
  • the other arm 17 is provided with a roller 18, which has an elastic covering 22.
  • the rollers 18 of the bell-crank levers cooperate with a camway 19. As is apparent from FIG. 1, the cooperation of the rollers 19 and the camway 19 causes each of the suc: cessive squeeze rollers 4 to be moved approximately horizontally against the conveying tube6 and to roll on the conveying tube during a revolution around one quarter of a circle so that the conveying tube is compressed and the mortar contained therein is advanced.
  • the squeeze roller 4 When the vertical position is reached, the squeeze roller 4 is lifted from the conveying tube. This lifting may be assisted by the weightof the squeeze roller and, if desired, by a spring or the like which acts on the bearing 3 of the squeeze roller 4 or on the bell-crank lever l6, 17.
  • the drive shaft 5 for the spider 2 is driven by a chain sprocket 25, a chain 24, and a driving chain sprocket 23.
  • a chain tensioner 26 ensures a sufficiently high tension of the chain.
  • a straight conveying tube may be used of the conveying tube and the squeeze rollers are arranged to be movable relative to each other and transversely to the dito convey mortar.

Abstract

An elastic flexible conveying tube has a length portion provided on the outside with ribs. Revolvable squeeze rollers are movable along said length portion in engagement therewith and have teeth adapted to mesh with said ribs.

Description

United. States Patent [1 '1 Magerle' I 1 1 Oct. 30, 1973 APPARATUS FOR CONTINUOUSLY CONVEYING SEMISOLII) MATERIAL BY THE ACTION OF CIRCULATING SQUEEZE ROLLERS ON A FLEXIBLE CONDUIT FOR THE MATERIAL [75] inventor: OttoMagerle, Klagenfurt, Austria [73 Assignee: Fa Tukiem Trust, Vadiz,
Liechtenstein [22] Filed: Mar. 14, 1972 [21] Appl. No.: 234,541
[30] Foreign Application Priority Data Mar.22 ,197l Austria 10A 2450 71 [52] US. Cl. 417/477, 417/900 [51] Int. Cl. F04b 43/08, F04b 45/06, F04b 15/02 [58] Field of Search 4157/474, 476, 477,
417/900; 128/214 F, DIG. 12
[56] References Cited UNITED STATES PATENTS 4/1949 Stocks 417/477 2,696,173 12/1954 Jensen 417/477 2,899,906 8/1959 Becher et a1. 417/477 2,899,907 8/1959 Becher 417/477 3,421,447 1/1969 Jackson et al. 417/477 3,433,170 3/1969v Malbec 417/477 3,565,554 2/1971 Muller 417/477 3,597,124 8/1971 Adams 417/477 FOREIGN PATENTS OR APPLICATIONS 598,811 5/1960 Canada 417/477 Primary ExaminerCarlton R. Croyle Assistant Examiner-Richard E. Gluck Attorney--lrvin S. Thompson et al.
57 I ABSTRACT An elastic flexible conveying tube has a length portion provided on the outside with ribs. Revolvable squeeze rollers are movable along said length portion in engagement therewith and have teeth adapted to mesh with said ribs.
7 Claims, 3 Drawing Figures Patented Oct. 30, 1973 H 4JWA A NEE APPARATUS FOR CONTINUOUSLY CONVEYING SEMISOLID MATERIAL BY THE ACTION OF CIRCULATING SQUEEZE ROLLERS ON A FLEXIBLE CONDUIT FOR THE MATERIAL This invention relates to apparatus for continuously conveying mortar or the like by means of an elastic, flexible conveying tube and revolvable squeeze elastic, flexible conveying tube and revolvable aqueeze rollers acting on said tube.
Such apparatus can well eliminate part of the disadvantages of the known equipment in which mortar or the like is conveyed by piston pumps. The disadvantages of equipment which uses piston pumps are due to the fact that the conveyance is intermittently effected by pistons having a short stroke and with an occurrence of extremely high pressure. Ball valves are required on the suction side and discharge side. Such equipment inevitably involves a segregation of the aggregates and mixing water because mixed lime or cement mortar is susceptible to impacts. If the valves are not tight, the intermittent application of pressure to the mixing water forces the latter back into the stirring trough before the mixture enters the conveying line so that the mortar increases progressively in stiffness and eventually clogs the conveying line. The hard aggregates of the mortar soon cause the ball valves to leak. A great disadvantage resides in that a continuous conveyance is not enabled and cannot be enabled even by a succeeding pressureequalizing air chamber. Besides, the contact of the mortar with metallic structures should be minimized because it tends to deposit thereon. Finally, the use of piston pumps and ball valves has the disadvantage that the flow of the mortar cannot be slowed down because the mortar cannot be sucked if the speed of the piston is too low.
The known apparatus for conveying mortar and the like by means of an elastic, flexible conveying tube and revolvable squeeze rollers acting on said tube have the disadvantage that the squeeze rollers slip off the conveying tube and tend to pull the same along in their direction of revolution during the conveyance so that a satisfactory continuous conveyance is not enabled by these apparatus.
To eliminate the disadvantages pointed out, the invention teaches to provide ribs on the outside of the conveying tube and to provide the squeeze rollers with teeth adapted to mesh with said ribs. The invention prevents a slipping of the squeeze rollers from the conveying tube and the latter can be held fast in the apparatus by the ribs in such a manner that the squeeze roller cannot pull the tube along during the conveyance. The provision of ribs on the conveying tube has the further advantage that the tube when squeezed together can open more easily to receive the material being handled.
In one embodiment of the invention, the internal cross-section of the conveying tube tapers in the direction of conveyance. As a result of this design, the empty space which results from the lifting of a squeeze roller is quickly filled from the larger volume of the tube by the material which is pushed forward by the succeeding squeeze roller.
According to another feature of the invention, the conveying tube is stiffened by longitudinal ribs outside the tube portion which is engageable by the squeeze rollers. The combination of the longitudinal ribs, which are not involved in the squeeze operation, and the meshing ribs, which suitably extend around the conveying tube, results in a considerable stiffeningof the conveying tube so that the same highly reliably returns to its open condition when a squeeze roller has left the tube.
It is also a feature of the invention that that side of the conveying tube which is remote from the squeeze rollers is retained in a bed of elastic material. As a result of this retention, the conveying tube cannot follow the conveying movement and cannot be elongated in its longitudinal direction. Such elongation would render the re-opening ofthe tube more difficult.'Besides, the elastic bed prevents a yielding of the conveying tube to large particles which have entered and also prevents'to a high degree any damage to the tube.
Details of the invention will be explained more fully with reference to the accompanying drawing, which shows diagrammatically and by way of example'an embodiment of the apparatus according to the invention for a continuous conveyance of mortar or the like.
FIG. 1 is-a vertical sectional view taken through the apparatus. 1
FIG. 2 is a longitudinal sectional view showing a detail, and
FIG. 3 is a transverse sectional view thereof.
The apparatus for continuously conveying mortar or the like comprises a housing 1, in which a'spider 2 provided with a drive shaft 5 is rotatably mounted. Squeeze rollers 4 are mounted with b'earings 3 on the spider 2 and cooperate with a flexible conveying tube 6., The conveying tube 6 is provided on the outside with ribs 7, which extend around the tube. The squeeze rollers carry teeth 8, which cooperate with these ribs 7. The conveying tube is provided with longitudinal ribs 9 outside that portion of the tube which is engageable by the squeeze rollers 4. The conveying tube is shown in a longitudinal sectional view in FIG. 2 and in a transverse sectional view in FIG. 3. It is apparent from FIG. 2 that the conveying tube has a slight taper in the direction of conveyance. The conveying tube 6 is concentric to the axis of rotation of the spider and is supported in the housing 1 on a bed 10 of elastic material The ribs 7 prevent a displacement of the conveying tube 6 in the direction of revolution. The conveying tube 6 is connected by quick-action couplings 11 to a feed pipe 12 and a discharge pipe 13. The mortar to be conveyed is mixed in a trough 14. A stirrer 15 is operated to prevent a segregation of the mixed mortar.
The spider 2 is provided with rotatably mounted bellcrank levers, which serve to move the squeeze rollers toward the conveying tube. One arm 16' of each bellcrank lever is formed with a longitudinal slot 21 which receives a pin 20 mounted on the bearing 3 of a squeeze roller. The other arm 17 is provided with a roller 18, which has an elastic covering 22. The rollers 18 of the bell-crank levers cooperate with a camway 19. As is apparent from FIG. 1, the cooperation of the rollers 19 and the camway 19 causes each of the suc: cessive squeeze rollers 4 to be moved approximately horizontally against the conveying tube6 and to roll on the conveying tube during a revolution around one quarter of a circle so that the conveying tube is compressed and the mortar contained therein is advanced. When the vertical position is reached, the squeeze roller 4 is lifted from the conveying tube. This lifting may be assisted by the weightof the squeeze roller and, if desired, by a spring or the like which acts on the bearing 3 of the squeeze roller 4 or on the bell-crank lever l6, 17. In the embodiment shown, the drive shaft 5 for the spider 2 is driven by a chain sprocket 25, a chain 24, and a driving chain sprocket 23. A chain tensioner 26 ensures a sufficiently high tension of the chain.
The embodiment which has been shown and described serves only to explain the nature of the invention, which is not restricted to details. For instance, a straight conveying tube may be used of the conveying tube and the squeeze rollers are arranged to be movable relative to each other and transversely to the dito convey mortar.
3. Apparatus as set forth in claim 1, in which said ribs extend transversely to the longitudinal direction of said tube.
4. Apparatus as set forth in claim 1, in which said tube has an internal cross-section which tapers in a predetermined longitudinal direction and said squeeze rollers are revolvable to move along said length portion in said predetermined direction.
5. Apparatus as set forth in claim I, in which said ribs extend around the periphery of said tube.
6. Apparatus as set forth in claim 1, in which said tube is provided with longitudinal ribs outside said length portion.
7. Apparatus as set forth in claim 1, in which said squeeze rollers are provided only on one side of said tube and said support means comprising a bed of elastic material on the side of said tube opposite said squeeze rollers.
l F t k

Claims (7)

1. Apparatus for continuously conveying semisolid material, which comprises an elastic flexible conveying tube having a length portion provided on the outside with ribs, support means engaging said ribs to prevent slippage of said tube, and revolvable squeeze rollers movable along said length portion in engagement therewith and having teeth adapted to mesh with said ribs.
2. Apparatus as set forth in claim 1, which is adapted to convey mortar.
3. Apparatus as set forth in claim 1, in which said ribs extend transversely to the longitudinal direction of said tube.
4. Apparatus as set forth in claim 1, in which said tube has an internal cross-section which tapers in a predetermined longitudinal direction and said squeeze rollers are revolvable to move along said length portion in said predetermined direction.
5. Apparatus as set forth in claim 1, in which said ribs extend around the periphery of said tube.
6. Apparatus as set forth in claim 1, in which said tube is provided with longitudinal ribs outside said length portion.
7. Apparatus as set forth in claim 1, in which said squeeze rollers are provided only on one side of said tube and said support means comprising a bed of elastic material on the side of said tube opposite said squeeze rollers.
US00234541A 1971-03-22 1972-03-14 Apparatus for continuously conveying semisolid material by the action of circulating squeeze rollers on a flexible conduit for the material Expired - Lifetime US3768934A (en)

Applications Claiming Priority (1)

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AT245071A AT309227B (en) 1971-03-22 1971-03-22 Device for the continuous promotion of mortar or the like.

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JP (1) JPS5127283B1 (en)
AT (1) AT309227B (en)
BE (1) BE780760A (en)
BR (1) BR7201617D0 (en)
CH (1) CH535379A (en)
DD (1) DD95979A5 (en)
DE (1) DE2211948A1 (en)
ES (1) ES400861A1 (en)
FR (1) FR2130359A1 (en)
GB (1) GB1347642A (en)
IT (1) IT950135B (en)
PL (1) PL77571B1 (en)
RO (1) RO59838A (en)
SE (1) SE372066B (en)
SU (1) SU466673A3 (en)
ZA (1) ZA721795B (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3816035A (en) * 1972-10-24 1974-06-11 E Malbec Peristaltic pump
US3999891A (en) * 1974-05-29 1976-12-28 Joseph Galea Pump using spaced sequential displacements along a flexible tube
US4218197A (en) * 1978-07-06 1980-08-19 Beckman Instruments, Inc. Combined peristaltic pump and valve flow controller
DE3202251A1 (en) * 1982-01-25 1983-08-11 MGVG Medizinische Geräte Vertriebs-Gesellschaft mbH, 8000 München Hose pump
US4540350A (en) * 1983-06-03 1985-09-10 Manfred Streicher Stricture pump
US5370510A (en) * 1992-06-12 1994-12-06 Bee Chemical Company Liquid metering system
US5549461A (en) * 1995-07-21 1996-08-27 Newland; George Peristaltic pump attachment for slurry mixers
DE19533432A1 (en) * 1995-09-11 1997-03-13 Volker Von Hertel Process to reduce hose pump rate decrease, esp. in medical uses
US6506035B1 (en) * 2001-03-20 2003-01-14 Zevex, Inc. Roller for peristaltic pumps having a plurality of projections to minimize current draw
US20040115080A1 (en) * 2002-12-17 2004-06-17 Littleton Earl Raymond Very low cost, high performance, self-propelled, highway legal, shotcrete pump
US20100047100A1 (en) * 2007-02-20 2010-02-25 Jms Co., Ltd. Tube pump and rotor for tube pump
US20110011811A1 (en) * 2009-07-17 2011-01-20 Gordon H. King Apparatus and method for the treatment of liquid/solid mixtures
USD672455S1 (en) 2010-10-01 2012-12-11 Zevex, Inc. Fluid delivery cassette
US8539672B2 (en) 2010-10-01 2013-09-24 Zevex, Inc. Method for improving accuracy in a peristaltic pump system based on tubing material properties
US8752436B2 (en) 2010-10-01 2014-06-17 Zevex, Inc. Pressure sensor seal and method of use
US8911414B2 (en) 2010-10-01 2014-12-16 Zevex, Inc. Anti free-flow occluder and priming actuator pad
US9004886B2 (en) 2010-10-01 2015-04-14 Zevex, Inc. Pressure monitoring system for infusion pumps

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982002075A1 (en) * 1980-12-13 1982-06-24 Iwata Noboru Squeeze pump
DE3431189A1 (en) * 1984-08-24 1986-03-06 Linnhoff & Thesenfitz Maschinen- und Anlagenbau GmbH, 8754 Großostheim ROTATIONAL HOSE PUMP
DE3607836A1 (en) * 1986-03-10 1987-09-17 Wibau Ag COMBINATION OF TRANSPORT, MIXING AND CONVEYOR FOR THE PRODUCTION AND MAINTENANCE OF THE MIXING QUALITY OF LARGER DIMENSIONS, IN PARTICULAR CEMENT CONCRETE
DE3840259A1 (en) * 1988-11-30 1990-05-31 Amazonen Werke Dreyer H Hose pump
NL9000867A (en) * 1990-04-12 1991-11-01 Bredel Exploitatie Bv HOSE PUMP WITH RETRACTABLE PRESS BODIES.

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Publication number Priority date Publication date Assignee Title
US2466618A (en) * 1945-09-18 1949-04-05 Stocks Ronald Kingsley Pump suitable for moving sludges and the like
US2696173A (en) * 1950-12-23 1954-12-07 Jensen Thormod Fluid pump
US2899907A (en) * 1959-08-18 Roller pump
US2899906A (en) * 1959-08-18 Roller pumps
CA598811A (en) * 1960-05-31 A. Seyler Leon Pumps and compressors of the flexible-tube type
US3421447A (en) * 1966-10-26 1969-01-14 Challenge Cook Bros Inc Fluid pump
US3433170A (en) * 1966-01-12 1969-03-18 Edouard Malbec Universal rotary volumetric-pulsation machine
US3565554A (en) * 1969-08-26 1971-02-23 Us Catheter & Instr Corp Reinforced compressible fluid transporting tube
US3597124A (en) * 1969-09-04 1971-08-03 Cenco Medical Health Supply Co Perastaltic pump

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899907A (en) * 1959-08-18 Roller pump
US2899906A (en) * 1959-08-18 Roller pumps
CA598811A (en) * 1960-05-31 A. Seyler Leon Pumps and compressors of the flexible-tube type
US2466618A (en) * 1945-09-18 1949-04-05 Stocks Ronald Kingsley Pump suitable for moving sludges and the like
US2696173A (en) * 1950-12-23 1954-12-07 Jensen Thormod Fluid pump
US3433170A (en) * 1966-01-12 1969-03-18 Edouard Malbec Universal rotary volumetric-pulsation machine
US3421447A (en) * 1966-10-26 1969-01-14 Challenge Cook Bros Inc Fluid pump
US3565554A (en) * 1969-08-26 1971-02-23 Us Catheter & Instr Corp Reinforced compressible fluid transporting tube
US3597124A (en) * 1969-09-04 1971-08-03 Cenco Medical Health Supply Co Perastaltic pump

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3816035A (en) * 1972-10-24 1974-06-11 E Malbec Peristaltic pump
US3999891A (en) * 1974-05-29 1976-12-28 Joseph Galea Pump using spaced sequential displacements along a flexible tube
US4218197A (en) * 1978-07-06 1980-08-19 Beckman Instruments, Inc. Combined peristaltic pump and valve flow controller
DE3202251A1 (en) * 1982-01-25 1983-08-11 MGVG Medizinische Geräte Vertriebs-Gesellschaft mbH, 8000 München Hose pump
US4540350A (en) * 1983-06-03 1985-09-10 Manfred Streicher Stricture pump
US5370510A (en) * 1992-06-12 1994-12-06 Bee Chemical Company Liquid metering system
US5549461A (en) * 1995-07-21 1996-08-27 Newland; George Peristaltic pump attachment for slurry mixers
DE19533432A1 (en) * 1995-09-11 1997-03-13 Volker Von Hertel Process to reduce hose pump rate decrease, esp. in medical uses
US6506035B1 (en) * 2001-03-20 2003-01-14 Zevex, Inc. Roller for peristaltic pumps having a plurality of projections to minimize current draw
US20040115080A1 (en) * 2002-12-17 2004-06-17 Littleton Earl Raymond Very low cost, high performance, self-propelled, highway legal, shotcrete pump
US20100047100A1 (en) * 2007-02-20 2010-02-25 Jms Co., Ltd. Tube pump and rotor for tube pump
US8262375B2 (en) * 2007-02-20 2012-09-11 Jms Co., Ltd. Tube pump and rotor for tube pump
US20110011811A1 (en) * 2009-07-17 2011-01-20 Gordon H. King Apparatus and method for the treatment of liquid/solid mixtures
US8074809B2 (en) * 2009-07-17 2011-12-13 Gordon H. King Apparatus and method for the treatment of liquid/solid mixtures
USD672455S1 (en) 2010-10-01 2012-12-11 Zevex, Inc. Fluid delivery cassette
US8539672B2 (en) 2010-10-01 2013-09-24 Zevex, Inc. Method for improving accuracy in a peristaltic pump system based on tubing material properties
US8752436B2 (en) 2010-10-01 2014-06-17 Zevex, Inc. Pressure sensor seal and method of use
US8911414B2 (en) 2010-10-01 2014-12-16 Zevex, Inc. Anti free-flow occluder and priming actuator pad
US9004886B2 (en) 2010-10-01 2015-04-14 Zevex, Inc. Pressure monitoring system for infusion pumps

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RO59838A (en) 1976-05-15
GB1347642A (en) 1974-02-27
PL77571B1 (en) 1975-04-30
ES400861A1 (en) 1975-02-16
SE372066B (en) 1974-12-09
FR2130359A1 (en) 1972-11-03
AT309227B (en) 1973-08-10
CH535379A (en) 1973-03-31
JPS5127283B1 (en) 1976-08-12
BE780760A (en) 1972-07-17
SU466673A3 (en) 1975-04-05
DE2211948A1 (en) 1972-09-28
AU4010772A (en) 1973-07-26
BR7201617D0 (en) 1973-06-12
DD95979A5 (en) 1973-02-20
IT950135B (en) 1973-06-20
ZA721795B (en) 1973-02-28

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