US5490860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable power cutting tool
Assignee: Medtronic Sofamor Danek Inc
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Filing: 1993-12-08
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Granted: 1996-02-13
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Expires: 2013-12-08
Abstract
Abstract A portable power cutting tool is disclosed, having a plurality of replaceable tool assemblies for connection to the power cutting tool, with each tool assembly having a different cutting blade and a mode of motion selected for optimum operation of the cutting blade. Each tool assembly has a mode of motion selected from the group of rotation, reciprocation, and a combination of rotation and reciprocation. The tool assemblies can be disposable.
Inventors
- 👤 George H. Middle
- 👤 Edward A. Evans
- 👤 Craig Purdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:32
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/32; A61B17/320016; A61B17/32002; A61B2017/0023; A61B2017/00681; A61B2017/00734
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
125 words
A system for performing cutting operations during surgery, comprising: a housing; a motor mounted within said housing, said motor having a rotating output shaft; and a plurality of surgical implement assemblies, each of which includes a different surgical implement and a transmission mechanism designed to impart a characteristic mode of motion to said surgical implement, a first said assembly producing rotary motion, a second said assembly producing reciprocating motion, and a third said assembly producing a combination of rotary and reciprocating motion; wherein each of said surgical implement assemblies is selectively attachable one-at-a-time by a user to said motor output shaft to perform a different desired cutting operation using said different surgical implement and said mode of motion which is characteristic to said selected assembly.
Claim 2
Independent Claim
125 words
A system for performing cutting operations during surgery, comprising: a housing; a motor mounted within said housing, said motor having a rotating output shaft; and a plurality of surgical implement assemblies, each of which includes a different surgical implement and a transmission mechanism designed to impart a characteristic mode of motion to said surgical implement, a first said assembly producing rotary motion, a second said assembly producing reciprocating motion, and a third said assembly producing a combination of rotary and reciprocating motion; wherein each of said surgical implement assemblies is selectively attachable one-at-a-time by a user to said motor output shaft to perform a different desired cutting operation using said different surgical implement and said mode of motion which is characteristic to said selected assembly.
Claim 3
Independent Claim
114 words
A system for performing cutting operations during surgery, comprising: a housing; a motor mounted within said housing, said motor having a rotating output shaft; a cam follower attached to said housing; a plurality of transmission mechanisms, each said mechanism having an output drive shaft, each said mechanism being designed to impart a different mode of motion to its respective drive shaft, and each said mechanism being selectively attachable one-at-a-time by a user to said motor output shaft to product a selected one of said different modes of motion; and a surgical implement attached to each said drive shaft; wherein said different modes of motion include rotation, reciprocation, and a combination of rotation and reciprocation.
Claim 4
Independent Claim
114 words
A system for performing cutting operations during surgery, comprising: a housing; a motor mounted within said housing, said motor having a rotating output shaft; a cam follower attached to said housing; a plurality of transmission mechanisms, each said mechanism having an output drive shaft, each said mechanism being designed to impart a different mode of motion to its respective drive shaft, and each said mechanism being selectively attachable one-at-a-time by a user to said motor output shaft to product a selected one of said different modes of motion; and a surgical implement attached to each said drive shaft; wherein said different modes of motion include rotation, reciprocation, and a combination of rotation and reciprocation.
Claim 5
Dependent Claim
85 words
A system as claimed in claim 2, wherein a first said transmission mechanism comprises: a first transmission body attachable to said housing; a first drive piston attachable to said motor output shaft for rotation by said motor output shaft; a cam groove on said first drive piston engaging with said cam follower to cause said first drive piston to reciprocate as said first drive piston rotates; and a drive shaft attached to said first drive piston for rotation and reciprocation by said first drive piston.
Claim 6
Dependent Claim
138 words
A system as claimed in claim 3, wherein a second said transmission mechanism comprises: a second transmission body attachable to said housing; a second drive piston attachable to said motor output shaft for rotation by said motor output shaft; a cam groove on said second drive piston engaging with said cam follower to cause said second drive piston to reciprocate relative to said housing as said second drive piston rotates; a second drive shaft attached to said second drive piston for reciprocation by said second drive piston; a rotation limiter piston fixedly attached to said second drive shaft; wherein said second drive piston is free to rotate relative to said second drive shaft; and wherein said rotation limiter piston is constrained by said second transmission body to prevent rotation of said second drive shaft relative to said housing.
Claim 7
Dependent Claim
90 words
A system as claimed in claim 4, wherein a third said transmission mechanism comprises; a third transmission body attachable to said housing; a drive bushing attachable to said motor output shaft for rotation by said motor output shaft; a third drive shaft fixedly attached to said drive bushing for rotation by said drive bushing; and a reciprocation limiter bushing fixedly attached to said third drive shaft; wherein said reciprocation limiter bushing is constrained by said third transmission body to prevent reciprocation of said third drive shaft relative to said housing.
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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) | 1999-02-12 | 1999-08-14 | 2000-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-02-12 | 2003-08-14 | 2004-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-02-12 | 2007-08-14 | 2008-02-13 | $7700.00 | Window Closed / Lapsed |