Patent US4522202A successfully refreshed from Google Patents.
US4522202A
Expired / Lapsed
US
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Curved intramedullary lower leg spike
Assignee: Schwarzkopf Technologies Corp
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Filing: 1983-12-29
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Granted: 1985-06-11
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Expires: 2003-12-29
Abstract
Abstract There is disclosed a curved intramedullary lower leg spike in which the face over which cooperates with a driving tool is disposed at an angle with respect to the longitudinal axis of the spike and in which the face area and the front plane of the spike define a divided frontal surface at the leading end of the spike and form an acute angle with the longitudinal axis thereof.
Inventors
- 👤 Wolf-Dieter Otte
- 👤 Heinz Otte
- 👤 Siegfried Schider
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:14
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/88; A61B17/92; A61B17/921; A61B17/68; A61B17/72
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
147 words
A curved, unitary intramedullary, lower leg spike suitable for being driven laterally at an acute angle with respect to the longitudinal axis of a bone, into a spike-receiving duct in said bone, said spike comprising a longitudinal portion, a curved portion, a striking end, and a shaped outer surface which extends along said longitudinal portion up to said striking end, said shaped outer surface being adapted to provide stability against twisting, said striking end having structured elements for actively engaging a driving tool to said spike, and further defining an exposed face area wherein a line drawn in a plane which lies across said face area and which intersects the front planar surface of said spike forms an acute angle with the longitudinal axis of said spike at said striking end, said spike being adapted to contact corticalis along said outer surface up to said striking end.
Claim 2
Dependent Claim
147 words
A curved, unitary intramedullary, lower leg spike suitable for being driven laterally at an acute angle with respect to the longitudinal axis of a bone, into a spike-receiving duct in said bone, said spike comprising a longitudinal portion, a curved portion, a striking end, and a shaped outer surface which extends along said longitudinal portion up to said striking end, said shaped outer surface being adapted to provide stability against twisting, said striking end having structured elements for actively engaging a driving tool to said spike, and further defining an exposed face area wherein a line drawn in a plane which lies across said face area and which intersects the front planar surface of said spike forms an acute angle with the longitudinal axis of said spike at said striking end, said spike being adapted to contact corticalis along said outer surface up to said striking end.
Claim 3
Dependent Claim
31 words
A curved, unitary, intramedullary lower leg spike according to claim 1 wherein the striking end is segmented and at that part thereof is perpendicular to the longitudinal axis of said spike.
Claim 4
Dependent Claim
23 words
A curved, unitary, intramedullary lower leg spike according to claim 2 wherein a surface of the striking end is a plurality of steps.
Claim 5
Dependent Claim
36 words
A curved, unitary, lower leg spike according to claim 1 wherein the striking end has a slot-shaped recess commencing at the face area which extends downwardly in the direction of the longitudinal axis of said spike.
Claim 6
Dependent Claim
30 words
A curved, unitary, intramedullary lower leg spike according to claim 1 wherein the striking end, viewed in a longitudinal direction, has an annular-shaped profile and walls of substantially uniform thickness.
Claim 7
Dependent Claim
17 words
A curved, unitary, intramedullary lower leg spike according to claim 1, wherein said striking end is segmented.
Claim 8
Dependent Claim
63 words
A curved, unitary, intramedullary lower leg spike according to claim 1 wherein said spike is adapted to be driven into a bone laterally at an acute angle with respect to the longitudinal axis of said bone into a spike-receiving duct in said bone in a direction radically deviating from a normal line extending onto the surface of said bone from said spike-receiving duct.
References Cited (Backward Citations)
US3441017A
Cited
US4011863A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-06-10 | 1988-12-10 | 1989-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-10 | 1992-12-10 | 1993-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-10 | 1996-12-10 | 1997-06-11 | $7700.00 | Window Closed / Lapsed |