Apparatus for dispensing low viscosity semi-fluid material under pressure
摘要
An injection gun especially useful for injecting low volume, high pressure shots of bone cement. The gun includes a cylindrical housing with a plunger including a plunger rod extending axially through the housing. The plunger rod includes a segment which is provided with an axial series of notches. A ratchet block is slidable axially within the cylindrical housing and is concentric with the plunger rod. The ratchet cylinder mounts at least a ratchet pawl urged against the plunger rod and adapted to engage and lock into the series of notches for forward movement. A pistol grip extends from the cylindrical housing, and a lever is pivoted thereto with an extension of the lever engaging the ratchet cylinder for advancing the plunger. A second ratchet pawl is mounted on a fixed member of the cylindrical housing for retaining the plunger against rearward movement when the pawl in the ratchet cylinder is disengaged from the rod.
申请公布号
US4994065(A)
申请公布日期
1991.02.19
申请号
US19900524793
申请日期
1990.05.18
申请人
ZIMMER, INC.
发明人
GIBBS, REBECCA;KRYGIER, JAN J.;MILLER, DECEASED, JOSEPH E.;DESROCHERS, EXECUTOR, BY L. A.;O'DONNELL, EXECUTOR, BY BRYAN;MILLER, EXECUTOR, BY PATRICIA