Pressurized fluid actuation system for amplifying operator input

Details Pressurized fluid actuation system for amplifying operator input Pressurized fluid actuation system for amplifying operator input

1993-09-30

1994-08-23

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Fluid operated

91403, 91410, 91428, 606206, F15B 1316, A61B 1728

Patent

active

053397231

ABSTRACT:
A pressurized fluid actuation system as provided for a surgical instrument. The system includes a double-acting fluid pressure actuator with an extension chamber and a retraction chamber separated by a piston for engaging a component of the instrument. An operating lever is pivotally mounted to the piston. The operating lever is also pivotally connected to a servo valve that has a valve spool. The valve is connected to a source of pressurized fluid and has first and second return ports for venting the fluid. The actuator extension and retraction chambers are connected with the valve for each communicating with the pressurized fluid source and with one of the return ports in response to the position of the valve spool. The system includes a feedback line communicating between the extension chamber and the valve to apply a force to the valve spool in one direction when the extension chamber is pressurized. The system also includes a sensing line communicating between the retraction chamber and the valve to apply a force to the valve spool in the opposite direction when the retraction chamber is pressurized.

REFERENCES:
patent: 3171329 (1965-03-01), Rasmussen
patent: 3628421 (1971-12-01), George
patent: 4485817 (1984-12-01), Swiggett
patent: 4488523 (1984-12-01), Shichman
patent: 4637474 (1987-01-01), Leonard
patent: 4721099 (1988-01-01), Chikama
patent: 4815450 (1989-03-01), Patel
patent: 4832473 (1989-05-01), Ueda
patent: 4890602 (1990-01-01), Hake
patent: 4893613 (1990-01-01), Hake
patent: 5080000 (1992-01-01), Bubic
patent: 5147378 (1992-09-01), Markham
patent: 5179934 (1993-01-01), Nagayoshi et al.
patent: 5250074 (1993-10-01), Wilk et al.
patent: 5271313 (1993-12-01), Lindegren
U.S. patent application Ser. No. 08/130,068 entitled "Articulable Socket Joint Assembly For An Endoscopic Instrument And Surgical Fastener Track Therefor". F.D: Sep. 30, 1993.
U.S. patent application Ser. No. 08/129,976 entitled "Pressurized Fluid Actuation System With Variable Force And Stroke Output For Use In A Surgical Instrument". F.D.: Sep. 30, 1993.
U.S. patent application Ser. No. 08/130,065. F.D: Sep. 30, 1993.

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