Single acting endoscopic instruments

Details Single acting endoscopic instruments Single acting endoscopic instruments

1992-09-11

1993-09-07

Cohen, Lee S.

Surgery

Truss

Pad

606205, 606207, 606208, A61B 1000

Patent

active

052419681

ABSTRACT:
Surgical instruments of the invention are provided with distal ends having a clevis and two discrete investment cast end effectors. One end effector is stationary relative to the clevis, and the other moves or rotates about a transverse pin of the clevis. The rotating end effector includes a first hole through which the transverse pin extends, and the surgical instrument includes an actuation mechanism for causing the rotating end effector to rotate about the transverse pin. The actuation mechanism preferably includes a push rod which is either directly coupled to the proximal end of the rotating end effector or coupled by a staple element. On the other hand, the stationary second end effector, while including a first hole through which the transverse pin extends, has a boss which preferably engages a hole in the clevis and is not coupled to the actuation mechanism. With the clevis and second end effector being coupled at two locations, the second end effector is not free to rotate about the clevis pin, but is held stationary. Other manners of holding the second end effector stationary are to provide the clevis with a boss, and the stationary end effector with a second hole into which the boss extends, or to provide another pin which extends through one arm of the clevis and the stationary end effector only.

REFERENCES:
patent: 3828791 (1974-08-01), Santos
patent: 4122856 (1978-10-01), Mosior et al.
patent: 4785825 (1988-11-01), Romaniuk et al.
patent: 4898157 (1990-02-01), Messroghli et al.
patent: 4944093 (1990-07-01), Falk
patent: 4950273 (1992-08-01), Briggs
patent: 5147373 (1992-09-01), Ferzli
patent: 5152780 (1992-10-01), Honkenen et al.

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