GB1522727A

GB1522727A – Twin check valve pump system having fail-safe characteristic
– Google Patents

GB1522727A – Twin check valve pump system having fail-safe characteristic
– Google Patents
Twin check valve pump system having fail-safe characteristic

Info

Publication number
GB1522727A

GB1522727A
GB45297/76A
GB4529776A
GB1522727A
GB 1522727 A
GB1522727 A
GB 1522727A
GB 45297/76 A
GB45297/76 A
GB 45297/76A
GB 4529776 A
GB4529776 A
GB 4529776A
GB 1522727 A
GB1522727 A
GB 1522727A
Authority
GB
United Kingdom
Prior art keywords
fluid
inlet
pumping chamber
pump
fail
Prior art date
1975-11-07
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

Application number
GB45297/76A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Baxter International Inc

Original Assignee
Baxter Travenol Laboratories Inc
Priority date (The priority date 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 date listed.)
1975-11-07
Filing date
1976-11-01
Publication date
1978-08-31

1976-11-01
Application filed by Baxter Travenol Laboratories Inc
filed
Critical
Baxter Travenol Laboratories Inc

1978-08-31
Publication of GB1522727A
publication
Critical
patent/GB1522727A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

Discuss

Classifications

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

F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 – F04B23/00 or F04B39/00 – F04B47/00

F04B53/06—Venting

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

A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use

A61M39/22—Valves or arrangement of valves

A61M39/24—Check- or non-return valves

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

A61M5/36—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 with means for eliminating or preventing injection or infusion of air into body

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

F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 – F04B47/00

F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 – F04B47/00 by means of valves

F04B49/24—Bypassing

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

A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use

A61M39/22—Valves or arrangement of valves

A61M39/24—Check- or non-return valves

A61M2039/2433—Valve comprising a resilient or deformable element, e.g. flap valve, deformable disc

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

A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use

A61M39/22—Valves or arrangement of valves

A61M39/24—Check- or non-return valves

A61M2039/2433—Valve comprising a resilient or deformable element, e.g. flap valve, deformable disc

A61M2039/2446—Flexible disc

A61M2039/246—Flexible disc being fixed along all or a part of its periphery

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

A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use

A61M39/22—Valves or arrangement of valves

A61M39/24—Check- or non-return valves

A61M2039/2473—Valve comprising a non-deformable, movable element, e.g. ball-valve, valve with movable stopper or reciprocating element

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

A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use

A61M39/22—Valves or arrangement of valves

A61M39/24—Check- or non-return valves

A61M2039/2473—Valve comprising a non-deformable, movable element, e.g. ball-valve, valve with movable stopper or reciprocating element

A61M2039/2486—Guided stem, e.g. reciprocating stopper

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

A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use

A61M39/22—Valves or arrangement of valves

A61M39/24—Check- or non-return valves

A61M2039/2493—Check valve with complex design, e.g. several inlets and outlets and several check valves in one body

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

Y10T137/00—Fluid handling

Y10T137/2931—Diverse fluid containing pressure systems

Y10T137/3003—Fluid separating traps or vents

Y10T137/3084—Discriminating outlet for gas

Abstract

1522727 Reciprocating pumps and compressors BAXTER TRAVENOL LABORATORIES Inc 1 Nov 1976 [7 Nov 1975] 45297/76 Headings F1A and F1N [ Also in Division F2] A pump, e.g. for parenteral solution infusion, has a porous member 40 communicating on one side with the inlet side upstream of the inlet valve 34 and on the other side with the pumping chamber 18, the member 40 permitting the passage of a first fluid but preventing the passage of a second fluid, so that the second fluid can be pumped but presence of the first fluid will prevent pumping. The first fluid may be a gas, e.g. air, and the second fluid, a liquid, e.g. blood, or vice versa. As shown, the pump inlet and outlet valves are constituted by a single member 32, having an inlet valve portion 34, and a duck-bill, outlet valve portion 36, which requires a predetermined delivery pressure to open. In Fig. 4 (not shown), the porous member (62) is supported by grates (64) in a partition between an inlet chamber (50) and a pumping chamber (54), a duckbill inlet valve (52) being located in the partition, and a spring-loaded, outlet valve (58) controlling flow from the pumping chamber. The pumping chamber 18 communicates with a syringe pump 30 which may be part of an infusion set, Figs. 1 and 3 (not shown).

GB45297/76A
1975-11-07
1976-11-01
Twin check valve pump system having fail-safe characteristic

Expired

GB1522727A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

US05/629,835

US4030495A
(en)

1975-11-07
1975-11-07
Twin check valve pump system having fail-safe characteristic

Publications (1)

Publication Number
Publication Date

GB1522727A
true

GB1522727A
(en)

1978-08-31

Family
ID=24524697
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB45297/76A
Expired

GB1522727A
(en)

1975-11-07
1976-11-01
Twin check valve pump system having fail-safe characteristic

Country Status (15)

Country
Link

US
(1)

US4030495A
(en)

JP
(1)

JPS5259986A
(en)

AU
(1)

AU1924976A
(en)

BE
(1)

BE848024A
(en)

BR
(1)

BR7607419A
(en)

CA
(1)

CA1070585A
(en)

DE
(1)

DE2649813A1
(en)

DK
(1)

DK491276A
(en)

ES
(1)

ES453082A1
(en)

FR
(1)

FR2330883A1
(en)

GB
(1)

GB1522727A
(en)

IL
(1)

IL50733A
(en)

IT
(1)

IT1063549B
(en)

NO
(1)

NO142605C
(en)

ZA
(1)

ZA766600B
(en)

Cited By (2)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

GB2181790A
(en)

*

1984-03-06
1987-04-29
Brightwell Dispensers Ltd
Manually operated pump

GB2213207A
(en)

*

1987-12-03
1989-08-09
Philips Nv
Steam iron

Families Citing this family (59)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US4114617A
(en)

*

1977-02-28
1978-09-19
Turner Thomas D
Apparatus for infusion of a measured volume of blood

US4140118A
(en)

*

1977-03-09
1979-02-20
Andros Incorporated
Cassette chamber for intravenous delivery system

US4136693A
(en)

*

1977-05-10
1979-01-30
Johnson & Johnson
Constant flow I.V. device

US4231724A
(en)

*

1978-03-09
1980-11-04
Hope Henry F
Adjustable metering pump

US4243031A
(en)

*

1978-12-18
1981-01-06
Abbott Laboratories
Intravenous pump filter protector

US4391600A
(en)

*

1979-03-09
1983-07-05
Avi, Inc.
Nonpulsating IV pump and disposable pump chamber

US4382753A
(en)

*

1979-03-09
1983-05-10
Avi, Inc.
Nonpulsating IV pump and disposable pump chamber

US4410322A
(en)

*

1979-03-09
1983-10-18
Avi, Inc.
Nonpulsating TV pump and disposable pump chamber

US4262668A
(en)

*

1979-04-06
1981-04-21
Baxter Travenol Laboratories, Inc.
Fixed volume infusion device

US4253501A
(en)

*

1979-11-09
1981-03-03
Ims Limited
Transfer system

US4336800A
(en)

*

1980-08-01
1982-06-29
Oximetrix, Inc.
Intravenous metering device

US4453932A
(en)

*

1980-08-01
1984-06-12
Oximetrix, Inc.
Intravenous metering device

US4336036A
(en)

*

1981-01-08
1982-06-22
Amf Incorporated
Filter and method of making same

JPS5919736B2
(en)

*

1981-02-09
1984-05-08
株式会社ニチリヨ−

pipetting device

US4515606A
(en)

*

1981-03-19
1985-05-07
Brunswick Corporation
Gas separating and venting filter

US4642098A
(en)

*

1981-06-29
1987-02-10
Valleylab, Inc.
IV system and controller and combination IV filter and pump assembly for use therein and method

US4468224A
(en)

*

1982-01-28
1984-08-28
Advanced Cardiovascular Systems, Inc.
System and method for catheter placement in blood vessels of a human patient

US4535818A
(en)

*

1983-09-26
1985-08-20
Vernay Laboratories, Inc.
Valve assembly

CA1257165A
(en)

*

1984-02-08
1989-07-11
Paul Epstein
Infusion system having plural fluid input ports and at least one patient output port

US4828545A
(en)

*

1984-02-08
1989-05-09
Omni-Flow, Inc.
Pressure responsive multiple input infusion system

US5100380A
(en)

*

1984-02-08
1992-03-31
Abbott Laboratories
Remotely programmable infusion system

US4608042A
(en)

*

1985-09-25
1986-08-26
Warner-Lambert Company
Apparatus for sequential infusion of medical solutions

US5070899A
(en)

*

1986-11-03
1991-12-10
Pall Corporation
Check valve

US4900308A
(en)

*

1987-05-27
1990-02-13
Level 1 Technologies, Inc.
Gas elimination device

US4857048A
(en)

*

1987-05-29
1989-08-15
Hewlett-Packard Company
IV pump and disposable flow chamber with flow control

US4850807A
(en)

*

1987-06-16
1989-07-25
Frantz Medical Development Ltd.
Disposable cassette for fluid delivery pump systems

US4845487A
(en)

*

1987-07-20
1989-07-04
Frantz Medical Development Ltd.
Pump system for enteral/parenteral fluid control and delivery

US5237309A
(en)

*

1987-07-20
1993-08-17
Frantz Medical Development, Ltd.
Pump cassette and method of pumping

AU2522388A
(en)

*

1987-10-05
1989-04-18
Gunter Heimhilcher
Nonreturn valve arrangement

US4838875A
(en)

*

1987-12-09
1989-06-13
Somor Andrew T
Method and apparatus for dealing with intravenous fluids

US5803712A
(en)

*

1988-05-17
1998-09-08
Patient Solutions, Inc.
Method of measuring an occlusion in an infusion device with disposable elements

US5074756A
(en)

*

1988-05-17
1991-12-24
Patient Solutions, Inc.
Infusion device with disposable elements

US5246347A
(en)

*

1988-05-17
1993-09-21
Patients Solutions, Inc.
Infusion device with disposable elements

US4936753A
(en)

*

1988-06-03
1990-06-26
The Aro Corporation
Diaphragm pump with interchangeable valves and manifolds

US4968301A
(en)

*

1989-02-02
1990-11-06
Imed Corporation
Disposable infusion device

US4972865A
(en)

*

1989-08-04
1990-11-27
Mattson Roy D
Anti-spillage and anti-drip device

US5261883A
(en)

*

1990-10-26
1993-11-16
Alcon Surgical, Inc.
Portable apparatus for controlling fluid flow to a surgical site

US5098405A
(en)

*

1991-01-31
1992-03-24
Becton, Dickinson And Company
Apparatus and method for a side port cathether adapter with a one piece integral combination valve

US5267964A
(en)

*

1992-03-23
1993-12-07
Clintec Nutrition Co.
Fluid control device including automatic valve

DE9216558U1
(en)

*

1992-12-04
1994-03-31
Zwaan Martin Dr

Gas injector

US5407424A
(en)

*

1993-02-24
1995-04-18
Scimed Life Systems, Inc.
Angioplasty perfusion pump

US6746419B1
(en)

1993-04-19
2004-06-08
Stryker Corporation
Irrigation handpiece with built in pulsing pump

US5470305A
(en)

*

1993-04-19
1995-11-28
Stryker Corporation
Irrigation handpiece with built in pulsing pump

US6213970B1
(en)

1993-12-30
2001-04-10
Stryker Corporation
Surgical suction irrigation

DE4439962A1
(en)

*

1994-11-09
1996-05-15
Lang Apparatebau Gmbh

Dosing pump with venting device

US5827941A
(en)

*

1994-12-12
1998-10-27
Pulmonary Data Service Instrumentation, Inc.
Flow-controlled calibration syringe

JP3524452B2
(en)

*

1999-02-10
2004-05-10
大研医器株式会社

Backflow regulating structure and backflow regulating unit of chemical liquid injector

US6652488B1
(en)

2000-09-11
2003-11-25
Stryker Corporation
Surgical suction irrigator

US6604915B1
(en)

2002-03-20
2003-08-12
Csa Engineering, Inc.
Compact, high efficiency, smart material actuated hydraulic pump

US7517387B2
(en)

*

2002-06-24
2009-04-14
Gambro Lundia Ab
Gas separation devices

US6874999B2
(en)

*

2002-08-15
2005-04-05
Motorola, Inc.
Micropumps with passive check valves

BRPI0518524A2
(en)

*

2004-12-30
2008-11-25
Vasogen Ireland Ltd

apparatus for controlled flow of fluid materials for use in medical materials

US7438537B2
(en)

*

2005-03-09
2008-10-21
Dosmatic Usa, Inc.
Liquid additive injection pump with mixing chamber and one way valve

US20060224125A1
(en)

*

2005-03-15
2006-10-05
Vasogen Ireland Limited
Multiport syringe

US8337486B2
(en)

*

2007-07-20
2012-12-25
Medingo Ltd.
Energy supply for fluid dispensing device

CN103470466B
(en)

*

2007-12-10
2016-08-17
拜耳医疗保健公司
Continuous print fluid delivery system and method

CN102631733B
(en)

*

2012-05-10
2014-04-30
浙江康泰医疗器械有限公司
Automatic exhaust and liquid stop and anti-blood backflow high-speed precision intelligent security infusion set

WO2016112163A1
(en)

2015-01-09
2016-07-14
Bayer Healthcare Llc
Multiple fluid delivery system with multi-use disposable set and features thereof

US11672908B2
(en)

*

2020-09-23
2023-06-13
Carefusion 303, Inc.
Intravenous filter

Family Cites Families (5)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US3033911A
(en)

*

1958-07-30
1962-05-08
Electric Storage Battery Co
Vent plug

US3572375A
(en)

*

1967-06-02
1971-03-23
David Rosenberg
Twin valve t-connector

US3559644A
(en)

*

1967-12-14
1971-02-02
Robert F Shaw
Liquid infusion apparatus

US3650093A
(en)

*

1970-01-08
1972-03-21
Pall Corp
Sterile disposable medicament administration system

US3803810A
(en)

*

1972-05-01
1974-04-16
Pall Corp
Liquid-gas separator and filter

1975

1975-11-07
US
US05/629,835
patent/US4030495A/en
not_active
Expired – Lifetime

1976

1976-10-18
CA
CA263,566A
patent/CA1070585A/en
not_active
Expired

1976-10-20
IL
IL50733A
patent/IL50733A/en
unknown

1976-10-29
DK
DK491276A
patent/DK491276A/en
not_active
Application Discontinuation

1976-10-29
DE
DE19762649813
patent/DE2649813A1/en
active
Pending

1976-11-01
GB
GB45297/76A
patent/GB1522727A/en
not_active
Expired

1976-11-02
AU
AU19249/76A
patent/AU1924976A/en
not_active
Expired

1976-11-03
ZA
ZA766600A
patent/ZA766600B/en
unknown

1976-11-04
JP
JP51133127A
patent/JPS5259986A/en
active
Pending

1976-11-05
NO
NO763764A
patent/NO142605C/en
unknown

1976-11-05
IT
IT29080/76A
patent/IT1063549B/en
active

1976-11-05
BE
BE172102A
patent/BE848024A/en
unknown

1976-11-05
FR
FR7633376A
patent/FR2330883A1/en
active
Granted

1976-11-05
ES
ES453082A
patent/ES453082A1/en
not_active
Expired

1976-11-05
BR
BR7607419A
patent/BR7607419A/en
unknown

Cited By (3)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

GB2181790A
(en)

*

1984-03-06
1987-04-29
Brightwell Dispensers Ltd
Manually operated pump

GB2213207A
(en)

*

1987-12-03
1989-08-09
Philips Nv
Steam iron

GB2213207B
(en)

*

1987-12-03
1991-11-27
Philips Nv
Steam iron

Also Published As

Publication number
Publication date

NO142605B
(en)

1980-06-09

AU1924976A
(en)

1978-05-11

BE848024A
(en)

1977-03-01

ES453082A1
(en)

1977-11-01

IL50733A
(en)

1979-03-12

FR2330883A1
(en)

1977-06-03

NO142605C
(en)

1980-09-17

BR7607419A
(en)

1977-09-20

JPS5259986A
(en)

1977-05-17

FR2330883B3
(en)

1979-07-20

CA1070585A
(en)

1980-01-29

US4030495A
(en)

1977-06-21

IL50733A0
(en)

1976-12-31

DE2649813A1
(en)

1977-05-18

IT1063549B
(en)

1985-02-11

NO763764L
(en)

1977-05-10

ZA766600B
(en)

1977-10-26

DK491276A
(en)

1977-05-08

Similar Documents

Publication
Publication Date
Title

GB1522727A
(en)

1978-08-31

Twin check valve pump system having fail-safe characteristic

GB1337407A
(en)

1973-11-14

Liquid infusion apparatus

GB1119665A
(en)

1968-07-10

Improvements in coaxially disposed suction and delivery lift valve assemblies for reciprocating pumps and compressors

GB1498398A
(en)

1978-01-18

Fluid infusion pump

GB1387978A
(en)

1975-03-19

Self-valving fluid reservoir and bubble trap

ES471363A1
(en)

1979-01-16

Medical infusion system

AU2003249296A8
(en)

2004-02-09

Systems and methods for performing peritoneal dialysis

GB1010067A
(en)

1965-11-17

Improvements relating to the control of fluids

GB1510129A
(en)

1978-05-10

Portable artificial kidney system

DK0596021T3
(en)

1997-09-22

Multiple valve assembly line for a drug infusion system.

IT1275135B
(en)

1997-07-30

PULSATILE PUMPING EQUIPMENT FOR LIQUIDS, IN PARTICULAR BLOOD.

WO2002026288A3
(en)

2002-09-06

Disposable cartridge for a blood perfusion system

ATE297768T1
(en)

2005-07-15

HEART CHAMBER SUPPORT SYSTEM WITH SECOND IMPELLER

GB1297794A
(en)

1972-11-29

GB1271130A
(en)

1972-04-19

Improvements in air pumps

GB1432974A
(en)

1976-04-22

GB1425115A
(en)

1976-02-18

Fluid pressure energy translating device

GB1160433A
(en)

1969-08-06

Improvements in or relating to Valveless Pumps.

GB1449075A
(en)

1976-09-08

Apparatus for the determination of liquid consumption

GB1334620A
(en)

1973-10-24

Pumps for pumping two fluids

GB1232738A
(en)

1971-05-19

GB1406245A
(en)

1975-09-17

Fuel supply arrangement for a gas turbine engine

US3405645A
(en)

1968-10-15

Dual fluid pumping system

ATE44882T1
(en)

1989-08-15

ARRANGEMENT FOR CHANGING THE FLUID PRESSURE.

GB1257427A
(en)

1971-12-15

Legal Events

Date
Code
Title
Description

1978-12-20
PS
Patent sealed [section 19, patents act 1949]

1984-07-11
PCNP
Patent ceased through non-payment of renewal fee

Download PDF in English

None