Surgery – Instruments – Cutting – puncturing or piercing
Patent
1997-12-04
1999-06-08
Buiz, Michael
Surgery
Instruments
Cutting, puncturing or piercing
A61B 1732
Patent
active
059101539
ABSTRACT:
To allow easy replacement of tools in a surgical punch with a tubular shaft, the distal end of which forms an annular cutting edge, a cutting member is mounted for longitudinal displacement in relation to the shaft, interacts with a cutting edge, and is held on an advancing element mounted for displacement in the shaft. An actuating member, arranged at the proximal end of the shaft, displaces the advancing element in the shaft. The cutting member is releasably connected to the advancing element and/or a sleeve bearing the cutting edge to the shaft. The releasable connections are provided using radially and elastically displaceable projections or detents on one part which engage behind recesses on the other part in a locking position and thereby secure the parts inserted into one another in an axial direction against any separation. The detents are prevented from moving radially out of the locking position into a release position by the abutment of the cutting member and advancing element on the inner wall of the shaft and/or the sleeve in the region of the detents. The advancing element and the cutting member are displaceable in an axial direction after release of the connection to the actuating member to such an extent in relation to the shaft that the radial movement of the detents into the release position is no longer hindered.
REFERENCES:
patent: 3837345 (1974-09-01), Matar
patent: 4018228 (1977-04-01), Goosen
patent: 5129913 (1992-07-01), Ruppert
patent: 5192294 (1993-03-01), Blake, III
patent: 5350392 (1994-09-01), Purcell et al.
Aesculap AG & Co. KG
Buiz Michael
Hoppin Ralph F.
Lipsitz Barry R.
Trinh Vikki
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