Back to results
US 4,644,952 AGranted
Surgical operating instrument
AssigneePalm Beach Medical Engineering, Inc.
InventorsMichael Patipa, Thomas A. McMillan, Henry W. Mitchell
Life of this patent
Estimating the term…
Abstract
A compact surgical operating instrument, including an elongated cylindrical housing supporting a projecting shaft which is mounted for reciprocation by a coaxially arranged cam assembly rotated by a motor drive. The cam assembly includes two continuous, opposed, canted cam surfaces which positively and alternatively drive forwardly and rearwardly a cam follower mounted on the inner end of said shaft, thereby converting rotation of the cam assembly to reciprocal movement of said shaft without the use of return springs.
Claims4
A compact surgical operating instrument comprising
- (a) a generally cylindrical elongated housing an axial bore therein;
- (b) a shaft mounted in said housing for limited axial reciprocable movement, the forward end of said shaft projecting outwardly through said bore;
- (c) a hollow cylindrical cam assembly mounted in said housing in coaxial relation with said shaft for rotation about said shaft;
- (d) drive housing for rotating said cam assembly;
- (e) the rearward end of said shaft being connected to said cam assembly;
- (f) said cam assembly having spaced, opposed forward and rearward continuous cam surfaces;
- (g) said forward cam surface having an opening therethrough;
- (h) the rearward end of said shaft extending through the opening of said forward cam surface;
- (i) cam follower means mounted on the rearward end of said shaft and being positioned between said facing cam surfaces;
- (j) said cam follower being displaced axially of said housing by said cam surfaces to convert rotating movement of said cam assembly to reciprocal movement of said shaft.
7 more elements
Dependencies are inferred from the claim text.