GB1344837A - Gas powered drive unit - Google Patents

Gas powered drive unit

Info

Publication number
GB1344837A
GB1344837A GB1023971*[A GB1023971A GB1344837A GB 1344837 A GB1344837 A GB 1344837A GB 1023971 A GB1023971 A GB 1023971A GB 1344837 A GB1344837 A GB 1344837A
Authority
GB
United Kingdom
Prior art keywords
piston
spool
gas
seats
communicating
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
Application number
GB1023971*[A
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.)
United States Surgical Corp
Original Assignee
United States Surgical Corp
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.)
Filing date
Publication date
Application filed by United States Surgical Corp filed Critical United States Surgical Corp
Publication of GB1344837A publication Critical patent/GB1344837A/en
Expired legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
    • A61B17/0682—Surgical staplers, e.g. containing multiple staples or clamps for applying U-shaped staples or clamps, e.g. without a forming anvil
    • A61B17/0684—Surgical staplers, e.g. containing multiple staples or clamps for applying U-shaped staples or clamps, e.g. without a forming anvil having a forming anvil staying above the tissue during stapling
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B2017/00535—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated
    • A61B2017/00544—Surgical instruments, devices or methods, e.g. tourniquets pneumatically or hydraulically operated pneumatically

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Molecular Biology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Actuator (AREA)
  • Sliding Valves (AREA)

Abstract

1344837 Pneumatic actuators UNITED STATES SURGICAL CORP 20 April 1971 [28 April 1970] 10239/71 Heading F1D [Also in Division A5] A pneumatic actuator 10 for operating a surgical skin stapling instrument comprises a piston 16 with an integral output shaft for actuating the stapler, the piston 16 being reciprocable in a casing member 20, and a spool 28 for controlling reciprocation of piston 16, the spool 28 being movable over a short distance in a plug 22 and having a seal 46 which normally closes gas inlet 46 under the bias of spring 30 urging the piston and spool rightwards, Fig.1. Spool 28 and piston 16 have O-rings 58, 62, 72 housed in annular seats 60, 64, 74, the depth of the seats being greater than the O-ring diameters. Communicating with seats 60, 64, 74 are bores 56, 66, 76 which, during piston reciprocation, transmit gas pressure to the inner side of O-rings 58, 62, 72 to urge them into tight sealing contact with plug 22 and casing member 20. In operation, a triggering means Fig.3 (not shown) moves shaft 14 in the direction 116 thus permitting gas pressure in inlet 42 to act on seal 46 to urge the spool 28 leftwards. Gas thus passes through bore 56, communicating with seat 60, and then through a restriction and threaded bore 48 to the right side of piston 16 which is thus moved to the left. Gas is fed to bores 66, 76 which communicate with seats 64, 74. The end of the movement to the left of piston 16 is damped by progressive throttling through co-operating chambers 82, 84 on the piston 16 and member 20. The return stroke is effected by spring 30 which causes piston 16 to thrust gas through a by-pass 68 in spool 28 to an annular chamber 70 communicating with an exhaust port 90.
GB1023971*[A 1970-04-28 1971-04-20 Gas powered drive unit Expired GB1344837A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3255070A 1970-04-28 1970-04-28

Publications (1)

Publication Number Publication Date
GB1344837A true GB1344837A (en) 1974-01-23

Family

ID=21865535

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1023971*[A Expired GB1344837A (en) 1970-04-28 1971-04-20 Gas powered drive unit

Country Status (3)

Country Link
US (1) US3613507A (en)
DE (1) DE2120448A1 (en)
GB (1) GB1344837A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3905276A (en) * 1972-09-29 1975-09-16 United States Surgical Corp Multiple spool power pack unit
US3836116A (en) * 1972-09-29 1974-09-17 Surgical Corp Self-energizing valve
US4331277A (en) * 1980-05-23 1982-05-25 United States Surgical Corporation Self-contained gas powered surgical stapler
US4349028A (en) * 1980-10-03 1982-09-14 United States Surgical Corporation Surgical stapling apparatus having self-contained pneumatic system for completing manually initiated motion sequence
GB8800909D0 (en) * 1988-01-15 1988-02-17 Ethicon Inc Gas powered surgical stapler
CA2117744A1 (en) * 1993-10-14 1995-04-15 David T. Green Gas powered apparatus for applying surgical fasteners to body tissue

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US878805A (en) * 1900-12-11 1908-02-11 Chicago Pneumatic Tool Co Pneumatic riveter.
GB525773A (en) * 1938-03-01 1940-09-04 Charles Auguste Maire Improvements in pneumatic hammers
US2870749A (en) * 1957-04-18 1959-01-27 Nat Supply Co Control valve for fluid operated engines for down well pumps
GB1172224A (en) * 1965-12-29 1969-11-26 Gaston E Marbaix Ltd Improvements relating to Pneumatic Devices for Driving Fasteners or like purposes

Also Published As

Publication number Publication date
DE2120448A1 (en) 1971-11-11
US3613507A (en) 1971-10-19

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees