Patent US4738254A successfully refreshed from Google Patents.
US4738254A
Expired / Lapsed
US
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Positioner for surgical instruments
Assignee: BIOMEDICAL ENGINEERING TRUST A CORP OF NJ
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Filing: 1984-03-07
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Granted: 1988-04-19
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Expires: 2004-03-07
Abstract
Abstract A positioner for positioning a surgical instrument which acts as a guide for a cutting instrument which produces a surgical cut in an anatomical structure; in one embodiment the positioner positions a surgical instrument which acts as a guide for the cutting instrument at a predetermined position with respect to a previously resected surface whereby a further resection is made at a predetermined position with respect to the previously resected surface; and in a further embodiment the positioner acts as an adaptor for a surgical instrument which aids in producing surgical sections thereby allowing the surgical instrument to produce surgical cuts at various predetermined positions relative to a previous surgical cut made at one of several levels.
Inventors
- 👤 Frederick F. Buechel
- 👤 Michael J. Pappas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:41
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/14; A61B17/15; A61B17/154; A61B17/155
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
192 words
A positioner for surgical instruments used to invade a bone, comprising: a body means, said body means including at least one guide surface for positioning a resectioning surgical instrument for resectioning a first bone; an alignment plate secured to said body means, said alignment plate including a planar reference surface for engaging in surface-to-surface contact with a surface on a second bone defining a reference plane, said planar reference surface being in a desired geometric relationship with said one guide surface on said body means, and wherein said first bone and said second bone are joined by ligaments, said alignment plate including means for spacing said first bone with respect to said second bone to establish a desired ligamentous tension; and an alignment rod means disposed on said body means, said alignment rod means for engaging said first bone to cooperate with said alignment plate to space said first and second bones to establish said desired ligamentous tension wherein said alignment rod means is slidably received within a bore formed axially in said first bone and said first bone is rotatable with respect to said body means on said alignment rod means.
Claim 2
Dependent Claim
192 words
A positioner for surgical instruments used to invade a bone, comprising: a body means, said body means including at least one guide surface for positioning a resectioning surgical instrument for resectioning a first bone; an alignment plate secured to said body means, said alignment plate including a planar reference surface for engaging in surface-to-surface contact with a surface on a second bone defining a reference plane, said planar reference surface being in a desired geometric relationship with said one guide surface on said body means, and wherein said first bone and said second bone are joined by ligaments, said alignment plate including means for spacing said first bone with respect to said second bone to establish a desired ligamentous tension; and an alignment rod means disposed on said body means, said alignment rod means for engaging said first bone to cooperate with said alignment plate to space said first and second bones to establish said desired ligamentous tension wherein said alignment rod means is slidably received within a bore formed axially in said first bone and said first bone is rotatable with respect to said body means on said alignment rod means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-19 | 1991-10-19 | 1992-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-19 | 1995-10-19 | 1996-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-19 | 1999-10-19 | 2000-04-19 | $7700.00 | Window Closed / Lapsed |