Surgery – Instruments – Forceps
Patent
1997-09-30
1999-02-09
Kamm, Willam E.
Surgery
Instruments
Forceps
A61P 1728
Patent
active
058687840
ABSTRACT:
A surgical instrument for laparoscopic surgery 21 including a handle having a body with a ratchet formed thereon. The handle including a trigger arm pivotally mounted on the body and adapted to operate a tool. The handle further includes a locking mechanism having a pawl moveably mounted on the trigger arm. The pawl is selectively movable relative to the trigger arm between an engaged position and a disengaged position. In the engaged position, the pawl is moved into engagement with the ratchet to prevent relative movement between the trigger arm and the body. In the disengaged position the pawl is disengaged from the ratchet. The handle also includes a bellcrank lever having first and second arms which are formed at an angle to one another. The bellcrank lever is pivotally mounted on the trigger arm at a pivot point positioned at the intersection of the first and second arms. Pivotal movement of the bellcrank lever operatively moves the pawl between the engaged and disengaged positions.
REFERENCES:
patent: 1274669 (1918-08-01), Bohn
patent: 1397732 (1921-11-01), Goodloe
patent: 4009712 (1977-03-01), Burstein et al.
patent: 5234460 (1993-08-01), Stouder, Jr.
patent: 5275608 (1994-01-01), Forman et al.
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