US3756556A - Fluid flow control apparatus - Google Patents

Fluid flow control apparatus Download PDF

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Publication number
US3756556A
US3756556A US00158897A US3756556DA US3756556A US 3756556 A US3756556 A US 3756556A US 00158897 A US00158897 A US 00158897A US 3756556D A US3756556D A US 3756556DA US 3756556 A US3756556 A US 3756556A
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United States
Prior art keywords
combination
set forth
spring
elongate
free end
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Expired - Lifetime
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US00158897A
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English (en)
Inventor
H Georgi
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NEW IVAC Inc
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Ivac Medical Systems Inc
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Assigned to NEW IVAC, INC. reassignment NEW IVAC, INC. MERGER (SEE DOCUMENT FOR DETAILS). Assignors: IVAC CORPORATION
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Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/172—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body electrical or electronic
    • 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
    • Y10S128/00—Surgery
    • Y10S128/13—Infusion monitoring
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18992—Reciprocating to reciprocating

Definitions

  • ABSTRACT An electromechanical device for parenteral administration of medical fluids, wherein a normally clampedoff intravenous feeding tube is repetitively opened at a frequently which establishes a desired fluid flow rate through the feeding tube.
  • a plurality of ribbon springs define a combination suspension and toggle mechanism for an electromechanical actuator shaft which is reciprocated to drive an IV tube pincher via flexing of one of the ribbon springs to which the tube pincher is attached.
  • This invention relates generally to improvements in fluid flow control apparatus and, more particularly, to a new and improved drop flow controller device for repetitively opening and closing an IV tube in the parenteral administration of medical liquids.
  • the intravenous set usually compl'ises a bottle of liquid, normally supported in an inverted position, an intravenous feeding tube, typically of plastic, and a suitable valve mechanism, such as a roll clamp, which allows the liquid to drip out of the bottle at a controlled rate into a drip chamber below the bottle.
  • the drip chamber serves a dual function of allowing a nurse or other attendant to observe the rate at which the liquid drips out of the bottle and also creates a reservoir for the liquid at the lower end of the chamber to ensure that no air enters the main feeding tube leading to the patient.
  • the parenteral administration of medical liquids by gravity induced hydrostatic pressure infusion of a liquid by a bottle or other container suspended above a patient is very susceptible to fluid flow rate variation due to changes in the liquid level in the bottle, changes in temperature, changes in the venous or arterial pressure of the patient, patient movement, and drift in the effective setting of the roll clamp or valve mechanism pinching the feeding tube.
  • the apparatus for vibrating the IV tube pincher includes a ribbon spring system defining a combined suspension and toggle mechanism for reciprocating actuator shaft which drives the tube pincher by repetitively flexing a ribbon spring to which the tube pincher is attached.
  • the actuator shaft may be supported at both of its extremities by ribbon springs so that the shaft is essentially floating, although guided, and thereby encounters no friction.
  • a feeding tube pincher is cyclically moved to the tube-open position by a mechanism which includes a substantially rectangular support system defining a floating suspension comprising a plurality of flexible ribbon springs, the springs being interconnected only at their comers by means of corner blocks which are common to adjacent springs.
  • a mechanism which includes a substantially rectangular support system defining a floating suspension comprising a plurality of flexible ribbon springs, the springs being interconnected only at their comers by means of corner blocks which are common to adjacent springs.
  • One pair of opposing sides of the support system are formed of single springs, while each of the remaining two sides is formed by two parallel springs connected to opposite faces of the corner blocks.
  • Two of the diagonally opposed corner blocks are rigidly fastened to a fixed secondary structure, such as a mounting plate, while the remaining two corners the actuator allows the springs to remain in a parallel,
  • the actuator shaft flexes the ribbon springs to which it is attached, causing the free floating corner blocks to move inwardly with the flexing movement.
  • the ribbon springs flex, but do not stretch.
  • the IV tube pincher is connected to one of the free corner blocks and is positioned so as to normally clamp off an IV tube when the actuator is unexcited, thereby preventing flows of fluids through the tube.
  • its reciprocating shaft flexes the springs which, in turn, vibrate the tube pincher to allow a controlled rate of fluid to pass through the IV tube.
  • the actuator shaft and ribbon spring to which the tube pincher is attached define a flexible toggle mechanism.
  • the flexible toggle mechanism for driving the tube pincher requires only a low deflection force for retracting the tube pincher to open the IV tube to flow yet provides an extremely high tube clamping force for shutting off flow when the ribbon spring is in its relaxed, substantially straight condition.
  • the vibrating apparatus is extremely quiet, since the actuator shaft is essentially floating and encounters no friction.
  • the system is also extremely reliable and experiences substantially no fatigue even when maintained in operation for extended periods of time.
  • FIG. 1 is a front elevational view of a fluid flow control apparatus constructed in accordance with the present invention and illustrating the basic principles thereof;
  • FIG. 2 is an enlarged, sectional view, taken along the line 2-2 in FIG. 1;
  • FIG. 3 is a perspective view of a presently preferred embodiment of a fluid flow control apparatus embodying the features of the present invention
  • FIG. 4 is a front elevational view of the apparatus shown in FIG. 3;
  • FIG. 5 is a left end elevational view of the apparatus shown in FIG. 4;
  • FIG. 6 is a right end elevational view of the apparatus shown in FIG. 4;
  • FIG. 7 is a top plan view of the apparatus shown in FIG. 4.
  • FIG. 8 is a front elevational view of an alternative embodiment of a fluid flow control apparatus constructed in accordance with the present invention.
  • the controller 10 includes a tube pincher 11 for cyclically clamping off and opening an IV tube 12 to permit fluid flow at a controlled rate through the tube.
  • the tube pincher 1 1 clamps the tube 12 against any suitable member 13 providing a hard clamping surface 13a.
  • the pincher 1 l is normally spring-biased to the tube clamp-off state by the relaxed condition of a substantially flat ribbon spring 14, ofa strong, resilient material such as steel or the like.
  • the ribbon spring 14 has a free end affixed to the tube pincher 11, as by screws 15, and has its opposite end secured to an anchor block 16, as by screws 17.
  • the anchor block 16 is rigidly fastened in any appropriate manner to a suitable fixed secondary structure (not shown).
  • the tube pincher 11 is mounted for sliding movement along a guide block 18, so that the pincher can vibrate back and forth, in a substantially linear path, to open and close the IV tube 12.
  • the pincher movement By confining the pincher movement to a substantially linear path, gradual creeping of the tube 12 along a path normal to the clamping forces is avoided.
  • the center of the spring 14 is rigidly connected by a coupling 19 to a shaft 21 of an electromechanical actuator 22, such as a voice coil actuator or solenoid.
  • an electromechanical actuator 22 such as a voice coil actuator or solenoid.
  • the stator magnet 22a of the actuator 22 is rigidly secured in any appropriate manner to a fixed secondary structure (not shown).
  • a voice coil actuator is preferred over a solenoid since force is directly proportional to electrical current for the voice coil actuator, and the force is substantially constant over the linear range of movement of the actuator shaft, whereas force is a complex square law function of both current and dis tance for a solenoid.
  • force is less noise generation with a voice coil actuator than with a solenoid, the latter having some tendency to bang the limit stops in view of the typical force-velocity characteristic for solenoids.
  • Deflection of the ribbon spring 14 by movement of the shaft 21 is substantially normal to the longitudinal axis of the spring.
  • the deflected position of the spring 14 is shown in phantom in FIG. 1.
  • Deflection of the spring 14 causes foreshortening of the free end of the spring along the relaxation axis of the spring so that the tube pincher 11 is retracted along the guide block 18 to open the IV tube 12 tofluid flow.
  • the deflection force necessary to flex the spring 14 is quite small compared to the force actually applied by the spring to the tube pincher 11.
  • release of the spring 14 permits the spring to return to its relaxed, unflexed state and provide an extremely high clamp-off force along its relaxation axis via the tube pincher 11 to the IV tube 12.
  • the latter provides positive shutofi' of fluid flow.
  • the actuator shaft 21 and ribbon 14 cooperate to provide a flexible toggle mechanism for vibrating the tube pincher l l in an extremely reliable, essentially noiseless manner with low power requirements, high leverage advantage and extremely positive shutoff characteristics.
  • FIGS. 3 through 7 of the drawings there is shown a presently preferred embodiment of a drop flow controller constructed in accordance with the present invention.
  • the reference numerals 110 through 122 indicate like or corresponding parts indicated by the reference numerals 10 through 22, respectively, in the embodiment of FIGS. 1 and 2.
  • the anchor block 116 is secured to a mounting plate 123 by any suitable fastening means, such as the screws 124.
  • the stator 1220 of the actuator 122 is secured to the mounting plate 123 by a pair of screws 125 which extend through a mounting flange 126 affixed to and projecting from the plate 123.
  • the end of the actuator shaft 121 remote from the spring 114 is connected by a coupling 128 to the center of a second single ribbon spring 129.
  • One end of the spring 129 is secured, as by screws 132, to an anchor block 131 affixed to the mounting plate 123 by a pair of screws 133.
  • the opposite end of the spring 129 is secured by a pair of screws 134 to a free floating corner block 136.
  • the ribbon spring 114 has its free end, remote from the anchor block 116, connected by a pair of screws 138 to a floating corner block 139 to which the tube pincher 111 is rigidly secured, as by a plurality of screws 141.
  • a pair of parallel ribbon springs 143 extend between the fixed anchor block 116 and the floating corner block 136, the springs being connected to opposite faces of both blocks by a plurality of screws 144.
  • a pair of parallel'ribbon springs 146 extend between the fixed anchor block 131 and the floating corner block 139, the springs being secured to opposite faces of both blocks by a plurality of screws 147.
  • the resulting configuration is a substantially rectangular ribbon spring support system defining a floating suspension for the actuator shaft 121 and the tube pincher 111, as well as defining a flexible toggle mechanism for vibrating the tube pincher 111 to repetitively open and close the IV tube 112.
  • the shaft Since both ends of the actuator shaft 121 are supported by the ribbon springs 114 and 129, the shaft is essentially mounted between a pair of floating guides and, therefore, reciprocates back and forth along its axis without any bearing friction. This results in an extremely low wear characteristic and is essentially noiseless. Similarly, since the tube pincher 111 is secured to the floating corner block 139, there is no need for the guide block 18 of FIGS. 1 and 2 and, therefore, the pincher lll vibrates quietly and without bearing friction.
  • pairs of double ribbon springs 143, 146 extending between the fixed anchor blocks 116, 131 and the floating corner blocks 136, 139, respectively, confines the inward movement of the floating corner blocks to substantially linear motion and thereby minimizes twisting moments on the actuator shaft 121 and the tube pincher 111.
  • the system starts out with all of the ribbon springs 114, 129, 143, 146 in the relaxed state shown by the solid lines in FIG. 4, and with the tube pincher 111 clamping off the IV tube 112.
  • the actuator 122 is electrically energized over the line 149
  • the shaft 121 simultaneously flexes both of the individual ribbon springs 114, 129 to which it is attached, causing the free floating corner blocks 136, 139 to move inwardly with the flexing movement. All of the ribbon springs flex, but they do not stretch.
  • the tube pincher 111 moves to its phantom position shown in FIG. 4 over the linear distance x, to open the IV tube 112 to fluid flow each time the floating corner block 139 moves inwardly.
  • the tube pincher 111 is opcrated cyclically in this fashion to control the rate of fluid flow through the IV tube 112.
  • a pair of noise damping pads 151, of rubber or the like, are secured to opposite faces of the flat ribbon spring 1 l4, and a similar pair of pads 152 are secured to opposite faces of the ribbon spring 129, to minimize vibration of the flexible springs at harmonic frequencies.
  • FIG. 8 of the drawings there is shown an alternate embodiment of a drop flow controller 210 constructed in accordance with the present invention.
  • the reference numerals 210 through 247 indicate like or corresponding parts indicated by the reference numerals through 147, respectively, in the embodiment of FIGS. 3-7.
  • the drop flow controller 210 may be further simplified by elimination of one of the ribbon springs 246, but here again, while the apparatus will function in the prescribed manner, the simpler configuration will be subject to greater twisting, not only of the actuator shaft 221, but of the IV tube pincher 211 as well.
  • the drop flow controller 210 possesses all of the other advantages of the combined floating suspension and toggle mechanism drive of the embodiments previously described.
  • the flexible toggle mechanism requires only a very low deflection force for retraction of the tube pincher to open the IV tube to fluid flow, yet provides an extremely high tube clamping force for shutting off flow whenever the ribbon spring 214 is in its relaxed state.
  • the vibrating apparatus is extremely quiet, since both the actuator shaft 221 and the tube pincher 211 are essentially floating and encounter virtually no friction.
  • the overall system is extremely reliable and experiences substantially no mechanical fatigue, even over extended periods of operation.
  • valve member connected to one end of said flexible member and driven by said toggle mechanism, whereby motion of said rigid member actuates said valve member.
  • valve member is .a tube pincher for squeezing an IV tube.
  • driver member connected intermediate the fixed and free ends of said resilient member to define, together with said resilient member, a toggle mechanism, whereby motion of said driver member drives said valve member.
  • valve member is a tube pincher for squeezing an IV tube.
  • an elongate, resilient member having one end fixed and its opposite end free to move at least linearly along the relaxation axis of said member when said member is flexed;
  • an actuator means located intermediate the fixed and free ends of said resilient member and moveable in a direction generally perpendicular to said relaxation axis for flexing said resilient member to impart movement to said valve member.
  • said actuator means is a voice coil actuator.
  • valve member is a tube pincher for squeezing an IV tube.
  • said actuator means includes a rigid shaft having its opposite ends connected to said elongate resilient member and a second resilient member, respectively, whereby said shaft is supported in a floating suspension defined by both resilient members.
  • a first elongate, resilient member having a fixed end and a free end;
  • valve member carried at the free end of said resilient member
  • a second elongate, resilient member having a fixed end and a free end
  • actuator means having a driver shaft with one end connected to said first resilient member intermediate said fixed end and said free end of said first member, said shaft also having its opposite end connected to said second resilient member, whereby movement of said shaft causes said first and said second resilient members to flex and impart movement to said valve member.
  • valve member is a tube pincher for squeezing an IV tube.
  • a first elongate, substantially flat ribbon spring having one end secured to said first anchor means and having its opposite free end attached to said junction means;
  • a second elongate, substantially flat ribbon spring having one end secured to said second anchor means and having its opposite free end attached to said junction means;
  • actuator means having a driver shaft with one end connected to said first spring intermediate said one end and said free end of said first spring, whereby flexing of said first spring by said shaft imparts movement to said junction means and said valve member.
  • a third elongate, substantially flat ribbon spring having one end secured to said second anchor means, said third spring also being coupled to the end of said driver shaft opposite said one end connected to said first spring, whereby said driver shaft is supported in a floating suspension.
  • a fourth elongate, substantially flat ribbon spring having one end secured to said first anchor means and having its opposite free end attached to said second junction means 30.
  • said actuator means is a voice coil actuator.
  • valve member is an IV tube pincher.
  • a first elongate, substantially flat ribbon spring having one end secured to said first anchor block and having its opposite free end attached to said first corner block;
  • a second elongate, substantially flat ribbon spring having one end secured to said second anchor block and having its opposite free end attached to said first corner block;
  • a third elongate, substantially flat ribbon spring having one end secured to saidsecond anchor block and having its opposite free end attached to said second corner block;
  • a fourth elongate, substantially flat ribbon spring having one end secured to said first anchor block and having its opposite free end attached to said second corner block;
  • a tube pincher carried at said first corner block and adapted to move therewith;
  • an actuator means having a driver shaft substantially normal to said first spring and said third spring, said shaft having one end connected to the center of said first spring and having its opposite end connected to the center of said third spring, whereby said shaft is supported in a floating suspension.
  • a sixth elongate, substantially flat ribbon spring parallel to and spaced apart from said fourth spring, said sixth spring having one end secured to said first anchor block and having its opposite end attached to said second corner block.

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Magnetically Actuated Valves (AREA)
US00158897A 1971-07-01 1971-07-01 Fluid flow control apparatus Expired - Lifetime US3756556A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15889771A 1971-07-01 1971-07-01

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Publication Number Publication Date
US3756556A true US3756556A (en) 1973-09-04

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Application Number Title Priority Date Filing Date
US00158897A Expired - Lifetime US3756556A (en) 1971-07-01 1971-07-01 Fluid flow control apparatus

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US (1) US3756556A (enExample)
JP (1) JPS5517403B1 (enExample)
CA (1) CA948177A (enExample)
CH (1) CH537574A (enExample)
DE (1) DE2162330A1 (enExample)
FR (1) FR2144190A5 (enExample)
GB (1) GB1366929A (enExample)
NL (1) NL169546C (enExample)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2533317A1 (de) * 1974-08-12 1976-02-26 Ivac Corp Durchflussregelsystem
WO1982001651A1 (en) * 1980-11-07 1982-05-27 Corp Ivac Combined load and latch mechanism for fluid control apparatus
US4421207A (en) * 1981-11-10 1983-12-20 Falconer David G Combination anti-friction bearing and force-generating mechanism
US4626241A (en) * 1985-03-06 1986-12-02 Ivac Corporation Apparatus and method for controlling the parenteral administration of fluids
US5553741A (en) * 1993-08-06 1996-09-10 River Medical, Inc. Liquid delivery device
US5588556A (en) * 1993-08-06 1996-12-31 River Medical, Inc. Method for generating gas to deliver liquid from a container
USD383206S (en) * 1990-10-22 1997-09-02 Nutricare Medical Products, Inc. Medical fluid drip container
US5700245A (en) * 1995-07-13 1997-12-23 Winfield Medical Apparatus for the generation of gas pressure for controlled fluid delivery
US20040099711A1 (en) * 2002-11-21 2004-05-27 Asm Technology Singapore Pte Ltd Clamp actuation mechanism
US8197235B2 (en) 2009-02-18 2012-06-12 Davis David L Infusion pump with integrated permanent magnet
US20120153551A1 (en) * 2010-12-15 2012-06-21 Grammer Ag Suspension device for vehicle seats and/or vehicle cabins having an elastomer member
US8353864B2 (en) 2009-02-18 2013-01-15 Davis David L Low cost disposable infusion pump
US8678508B2 (en) 2010-08-02 2014-03-25 Grammer Ag Horizontal springing means with inclination compensation
US8926012B2 (en) 2010-08-31 2015-01-06 Grammer Ag Vehicle seats for vehicles
US8960802B2 (en) 2010-11-29 2015-02-24 Grammer Ag Vehicle seat with guided scissor arms
US8973967B2 (en) 2011-09-15 2015-03-10 Grammer Ag Vehicle seat, motor vehicle and method for spring-mounting a vehicle seat
US9266452B2 (en) 2010-12-08 2016-02-23 Grammer Ag Vehicle vibration device for vehicle seats or vehicle cabs
US9376042B2 (en) 2010-08-04 2016-06-28 Grammer Ag Horizontal springing device for vehicle seats with elastomer spring element with progressive spring characteristic curve
US10065541B2 (en) 2015-08-10 2018-09-04 Grammer Ag Horizontal vibration device for a vehicle seat

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1886514A (en) * 1932-03-07 1932-11-08 Mentore L Angelini Collapsible tube cap
US2037844A (en) * 1935-03-01 1936-04-21 Judson W Wright Solenoid valve
US2744748A (en) * 1952-12-22 1956-05-08 Hamilton Thomas Corp Zero scale spring
US2894741A (en) * 1957-11-01 1959-07-14 Sigma Instr Co Ltd Mechanical guiding devices
GB983010A (en) * 1961-06-29 1965-02-10 Heinz Teves Improvements in cut-in valves for a pressure medium source
US3218935A (en) * 1962-11-23 1965-11-23 Fluid Tec Company Concrete finishing tool
US3278153A (en) * 1963-06-04 1966-10-11 Gorman Rupp Ind Inc Double action pinch tube valve
US3401711A (en) * 1966-07-29 1968-09-17 Abex Corp Single receiver port jet displacement servovalve
US3460572A (en) * 1966-12-21 1969-08-12 Remington Arms Co Inc Fluidic system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1886514A (en) * 1932-03-07 1932-11-08 Mentore L Angelini Collapsible tube cap
US2037844A (en) * 1935-03-01 1936-04-21 Judson W Wright Solenoid valve
US2744748A (en) * 1952-12-22 1956-05-08 Hamilton Thomas Corp Zero scale spring
US2894741A (en) * 1957-11-01 1959-07-14 Sigma Instr Co Ltd Mechanical guiding devices
GB983010A (en) * 1961-06-29 1965-02-10 Heinz Teves Improvements in cut-in valves for a pressure medium source
US3218935A (en) * 1962-11-23 1965-11-23 Fluid Tec Company Concrete finishing tool
US3278153A (en) * 1963-06-04 1966-10-11 Gorman Rupp Ind Inc Double action pinch tube valve
US3401711A (en) * 1966-07-29 1968-09-17 Abex Corp Single receiver port jet displacement servovalve
US3460572A (en) * 1966-12-21 1969-08-12 Remington Arms Co Inc Fluidic system

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2533317A1 (de) * 1974-08-12 1976-02-26 Ivac Corp Durchflussregelsystem
WO1982001651A1 (en) * 1980-11-07 1982-05-27 Corp Ivac Combined load and latch mechanism for fluid control apparatus
US4460358A (en) * 1980-11-07 1984-07-17 Ivac Corporation Combined load and latch mechanism for fluid flow control apparatus
US4421207A (en) * 1981-11-10 1983-12-20 Falconer David G Combination anti-friction bearing and force-generating mechanism
US4626241A (en) * 1985-03-06 1986-12-02 Ivac Corporation Apparatus and method for controlling the parenteral administration of fluids
USD383206S (en) * 1990-10-22 1997-09-02 Nutricare Medical Products, Inc. Medical fluid drip container
US5553741A (en) * 1993-08-06 1996-09-10 River Medical, Inc. Liquid delivery device
US5558255A (en) * 1993-08-06 1996-09-24 River Medical, Inc. Liquid delivery device
US5588556A (en) * 1993-08-06 1996-12-31 River Medical, Inc. Method for generating gas to deliver liquid from a container
US5700245A (en) * 1995-07-13 1997-12-23 Winfield Medical Apparatus for the generation of gas pressure for controlled fluid delivery
US20040099711A1 (en) * 2002-11-21 2004-05-27 Asm Technology Singapore Pte Ltd Clamp actuation mechanism
US6783052B2 (en) * 2002-11-21 2004-08-31 Asm Technology Singapore Pte Ltd Clamp actuation mechanism
US8197235B2 (en) 2009-02-18 2012-06-12 Davis David L Infusion pump with integrated permanent magnet
US8353864B2 (en) 2009-02-18 2013-01-15 Davis David L Low cost disposable infusion pump
US8678508B2 (en) 2010-08-02 2014-03-25 Grammer Ag Horizontal springing means with inclination compensation
US9376042B2 (en) 2010-08-04 2016-06-28 Grammer Ag Horizontal springing device for vehicle seats with elastomer spring element with progressive spring characteristic curve
US8926012B2 (en) 2010-08-31 2015-01-06 Grammer Ag Vehicle seats for vehicles
US8960802B2 (en) 2010-11-29 2015-02-24 Grammer Ag Vehicle seat with guided scissor arms
US9266452B2 (en) 2010-12-08 2016-02-23 Grammer Ag Vehicle vibration device for vehicle seats or vehicle cabs
US20120153551A1 (en) * 2010-12-15 2012-06-21 Grammer Ag Suspension device for vehicle seats and/or vehicle cabins having an elastomer member
US8800977B2 (en) * 2010-12-15 2014-08-12 Grammer Ag Suspension device for vehicle seats and/or vehicle cabins having an elastomer member
US8973967B2 (en) 2011-09-15 2015-03-10 Grammer Ag Vehicle seat, motor vehicle and method for spring-mounting a vehicle seat
US10065541B2 (en) 2015-08-10 2018-09-04 Grammer Ag Horizontal vibration device for a vehicle seat

Also Published As

Publication number Publication date
CA948177A (en) 1974-05-28
DE2162330A1 (de) 1973-01-11
JPS5517403B1 (enExample) 1980-05-12
GB1366929A (en) 1974-09-18
CH537574A (de) 1973-05-31
FR2144190A5 (enExample) 1973-02-09
NL169546B (nl) 1982-03-01
NL7117228A (enExample) 1973-01-03
NL169546C (nl) 1982-08-02

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Owner name: NEW IVAC, INC.

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