US5057112A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatically powered orthopedic broach
Assignee: Zimmer Inc
•
Filing: 1990-01-04
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Granted: 1991-10-15
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Expires: 2010-01-04
Abstract
Abstract A pneumatically driven orthopedic broach inserter comprising a continuously reciprocating piston which strikes a proximal anvil during each cycle. The impact of the piston with the proximal anvil drives the broach out of a bone. To drive the broach into the bone, a surgeon pushes on the power broach inserter, bringing a distal anvil into the path of the piston, and creating a forward action which dominates over the on-going reverse action produced by the piston striking the proximal anvil. The piston is provided with a low-friction sleeve so that completely oilless operation is possible. A fast-acting chuck having a key and a wedge is provided whereby broaches of different size can be quickly attached to the power broach inserter. In addition, means whereby the relative angular orientation between the broach and the power broach inserter may be changed continuously as the surgeon presents the broach toward the bone, but whereby the angular orientation is fixed as the surgeon pushes the broach into the bone is provided.
Inventors
- 👤 Randy G. Sherman
- 👤 Marc Vreede
- 👤 Fred D. Tripp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:04
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/16; A61B17/1659; A61B17/1604; A61B17/56; A61B17/58; A61B17/88; A61B17/92; A61B2017/00535; A61B2017/00544; A61B2017/922; A61B2017/924; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/3662; A61F2/367; A61F2/46; A61F2/4603; A61F2/4607; A61F2002/4619
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
81 words
An apparatus for driving an orthopedic broach into a bone of a patient, comprising: means for mounting a broach on the apparatus, means continually operative to apply a periodic percussive force to the broach in a first direction, means selectively operative to apply a second periodic percussive force to the broach in a second direction, said second direction being substantially opposite to said first direction, and means for controlling the magnitude of the second percussive force applied by selectively operative means.
Claim 2
Independent Claim
81 words
An apparatus for driving an orthopedic broach into a bone of a patient, comprising: means for mounting a broach on the apparatus, means continually operative to apply a periodic percussive force to the broach in a first direction, means selectively operative to apply a second periodic percussive force to the broach in a second direction, said second direction being substantially opposite to said first direction, and means for controlling the magnitude of the second percussive force applied by selectively operative means.
Claim 3
Dependent Claim
36 words
The apparatus according to claim 1 wherein the continually operative force-applying means further comprises: retracting means and proximal anvil means, said retracting means striking said anvil means during substantially each cycle of operation of the apparatus.
Claim 4
Dependent Claim
48 words
The apparatus according to claim 2 wherein the selectively operative force-applying means further comprises: inserting means and a distal, moveable anvil means, said distal anvil means being connected to the broach mounting means, and means for displacing the moveable anvil means into the path of the inserting means.
Claim 5
Dependent Claim
48 words
The apparatus according to claim 3, wherein the anvil displacing means comprise: a shaft connected at one end thereof to the broach mounting means and at an other end thereof to the moveable anvil means, and spring means tending to hold the shaft away from the inserting means.
Claim 6
Dependent Claim
29 words
The apparatus according to claim 4 wherein the retracting means comprise a proximal face of a piston and wherein the inserting means comprise a distal face of a piston.
Claim 7
Dependent Claim
20 words
The apparatus according to claim 5 wherein the piston comprises means for providing a low-friction sliding surface without a lubricant.
Claim 8
Dependent Claim
15 words
The apparatus according to claim 6 wherein the surface providing means comprise a polyamide-imide sleeve.
Claim 9
Dependent Claim
33 words
The apparatus according to claim 7 wherein the polyamideimide sleeve further comprises a first ridge at a proximal end of the sleeve, and a second ridge at a distal end of the sleeve.
Claim 10
Dependent Claim
18 words
The apparatus according to claim 8 further comprising a semi-gloss surface engaging the sliding surface of the piston.
Claim 11
Dependent Claim
16 words
The apparatus according to claim 9 further comprising means for selectively rotating the broach mounting means.
Claim 12
Dependent Claim
58 words
The apparatus according to claim 10 wherein the rotating means comprise means for permitting rotation of the broach mounting means during operation of the continually operative force applying means as long as the inserting force applying means is not selected and means for prohibiting rotation of the broach mounting means when the inserting force applying means is selected.
Claim 13
Dependent Claim
40 words
The apparatus according to claim 11 wherein the rotation prohibiting means comprise a plurality of splines on the shaft and at least one pin for selectively engaging at least one of the splines, whereby rotation of the shaft is prevented.
Claim 14
Dependent Claim
17 words
The apparatus according to claim 12 wherein the splines are parallel to an axis of the shaft.
Claim 15
Dependent Claim
14 words
The apparatus according to claim 13 wherein the splines extend radially from the shaft.
Claim 16
Dependent Claim
18 words
The apparatus according to claim 14 wherein the rotation permitting means comprise a sleeve mounted on the shaft.
Claim 17
Dependent Claim
33 words
The apparatus according to claim 15 wherein the broach mounting means comprise means for gripping a pin in a bore in a broach, and means for wedging the gripping means against the ridge.
Claim 18
Dependent Claim
32 words
The apparatus according to claim 16 wherein the wedging means further comprise means for insertion into the bore in the broach and a sleeve surrounding the gripping means and the insertion means.
Claim 19
Dependent Claim
18 words
The apparatus according to claim 17 wherein the sleeve comprises an inclined end for pushing against the broach.
Claim 20
Dependent Claim
35 words
The apparatus according to claim 18 wherein the broach mounting means further comprise chuck means for tightening the insertion means into the broach and for tightening the inclined end of the sleeve against the broach.
Claim 21
Dependent Claim
22 words
The apparatus according to claim 19 wherein the chuck means further comprise means for locking the chuck means in a tightened position.
Claim 22
Dependent Claim
48 words
The apparatus according to claim 20 wherein the locking means comprise a pair of opposed flats on the shaft and a lock ring having a central opening with at least two surfaces for engaging the opposed flats and means for connecting the lock ring and the chuck means.
Claim 23
Dependent Claim
29 words
The apparatus according to claim 21 wherein the connecting means comprise at least one pin on the lock ring and a plurality of opposed bores in the chuck means.
Claim 24
Dependent Claim
16 words
The apparatus according to claim 4 further comprising means for selectively rotating the broach mounting means.
Claim 25
Dependent Claim
58 words
The apparatus according to claim 23 wherein the rotating means comprise means for permitting rotation of the broach mounting means during operation of the continually operative force applying means as long as the inserting force applying means is not selected and means for prohibiting rotation of the broach mounting means when the inserting force applying means is selected.
Claim 26
Dependent Claim
39 words
The apparatus according to claim 24 wherein the rotation prohibiting means comprise a plurality of splines on the shaft and at least one pin for engaging at least one of the splines, whereby rotation of the shaft is prevented.
Claim 27
Dependent Claim
17 words
The apparatus according to claim 25 wherein the splines are parallel to an axis of the shaft.
Claim 28
Dependent Claim
14 words
The apparatus according to claim 26 wherein the splines extend radially from the shaft.
Claim 29
Dependent Claim
18 words
The apparatus according to claim 27 wherein the rotation permitting means comprise a sleeve mounted on the shaft.
Claim 30
Independent Claim
78 words
An apparatus for driving an orthopedic broach into a patient's bone, comprising: means for mounting a broach on the apparatus, means for producing a periodic percussive force, means for selectively applying said force to the broach, means for permitting rotation of the broach mounting means, whenever said periodic percussive force is being produced but is not applied to the broach and means for prohibiting rotation of the broach mounting means whenever said force is applied to the broach.
Claim 31
Independent Claim
78 words
An apparatus for driving an orthopedic broach into a patient's bone, comprising: means for mounting a broach on the apparatus, means for producing a periodic percussive force, means for selectively applying said force to the broach, means for permitting rotation of the broach mounting means, whenever said periodic percussive force is being produced but is not applied to the broach and means for prohibiting rotation of the broach mounting means whenever said force is applied to the broach.
Claim 32
Dependent Claim
60 words
The apparatus according to claim 29 further comprising a shaft connected to said mounting means and slidable axially with respect to the force producing means and wherein the rotation prohibiting means comprise a plurality of splines on the shaft and at least one pin for selectively engaging at least one of the splines, whereby rotation of the shaft is prevented.
Claim 33
Dependent Claim
17 words
The apparatus according to claim 30 wherein the splines are parallel to an axis of the shaft.
Claim 34
Dependent Claim
14 words
The apparatus according to claim 31 wherein the splines extend radially from the shaft.
Claim 35
Dependent Claim
18 words
The apparatus according to claim 32 wherein the rotation permitting means comprise a sleeve mounted on the shaft.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-10-14 | 1995-04-15 | 1995-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-14 | 1999-04-15 | 1999-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-14 | 2003-04-15 | 2003-10-15 | $7700.00 | Window Closed / Lapsed |