US4379451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intramedullary hip pin and cortical plate
Assignee: Individual
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Filing: 1980-11-04
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Granted: 1983-04-12
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Expires: 2000-11-04
Abstract
Abstract To receive the weight of the body from the pelvis and distribute it evenly to the shaft of a fractured femur while bracing the fractured femur, an intramedullary hip pin engages a plate secured to the lateral cortex of the shaft. The hip pin has an enlarged end portion positionable within the head and neck of the femur to receive and distribute forces from the pelvis and to impede protrusion of the pin through the head of the femur. The hip pin also includes an expansible member in the form of a cage for tightly securing the hip pin within the head and neck of the femur. The plate is adapted to be secured to the outer surface of the femur and includes an inclined, tubular, pin-receiving portion extending partially into an opening formed through the surface of the femur and into the neck of the femur.
Inventors
- 👤 Philip E. Getscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:01
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/56; A61B17/58; A61B17/68; A61B17/74; A61B17/742; A61B17/746; A61F; A61F2/00; A61F2/02; A61F2/30; A61F2/32; A61F2/36; A61F2/3601; A61F2002/30001; A61F2002/30316; A61F2002/30535; A61F2002/30579; A61F2/3609; A61F2002/3625
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
271 words
An intramedullary pin, comprising: an elongate shaft having a longitudinally extending groove and a threaded portion formed intermediate its ends, the shaft having an enlarged, flattened end; an expansible cage adapted to be secured to the shaft, the cage including a first section in the form of a ring encircling the shaft, the ring including a boss extending into the groove, the first section being a generally concave or conical basket including a pair of fingers having reversely bent end portions as well as a pair of legs having openings formed near their ends, the fingers and legs alternating circumferentially of the ring and being spaced 90 degrees from each other, the cage also including a second section, the second section having a generally concave or conical basket the generally concave or conical baskets of the first and second sections having their concave sides facing one another, wherein the fingers extend through openings in the legs to form an interlocking cage; the bosses of the first and second sections being axially aligned for engagement with the longitudinal groove in the shaft; a nut engagable with the threads on the shaft and with one of the sections such that, upon tightening the nut, the sections are clamped between the nut and the enlarged end and are compressed axially, thereby expanding the fingers radially outwardly of the shaft; an elongate section securable to the lateral cortex of the shaft of a femur; and a tubular portion positioned at an obtuse angle with respect to the longitudinal axis of the elongate section, the tubular portion adapted to receive the shaft in sliding, non-rotating relationship.
Claim 2
Dependent Claim
271 words
An intramedullary pin, comprising: an elongate shaft having a longitudinally extending groove and a threaded portion formed intermediate its ends, the shaft having an enlarged, flattened end; an expansible cage adapted to be secured to the shaft, the cage including a first section in the form of a ring encircling the shaft, the ring including a boss extending into the groove, the first section being a generally concave or conical basket including a pair of fingers having reversely bent end portions as well as a pair of legs having openings formed near their ends, the fingers and legs alternating circumferentially of the ring and being spaced 90 degrees from each other, the cage also including a second section, the second section having a generally concave or conical basket the generally concave or conical baskets of the first and second sections having their concave sides facing one another, wherein the fingers extend through openings in the legs to form an interlocking cage; the bosses of the first and second sections being axially aligned for engagement with the longitudinal groove in the shaft; a nut engagable with the threads on the shaft and with one of the sections such that, upon tightening the nut, the sections are clamped between the nut and the enlarged end and are compressed axially, thereby expanding the fingers radially outwardly of the shaft; an elongate section securable to the lateral cortex of the shaft of a femur; and a tubular portion positioned at an obtuse angle with respect to the longitudinal axis of the elongate section, the tubular portion adapted to receive the shaft in sliding, non-rotating relationship.
Claim 3
Dependent Claim
231 words
An intramedullary pin, comprising: an elongate shaft having a longitudinally extending groove and a threaded portion formed intermediate its ends; the shaft having an enlarged, flattened end; an expansible cage adapted to be secured to the shaft; the cage including a first section in the form of a ring encircling the shaft; the ring including a boss extending into the groove; the first section also including a pair of radially extending fingers having reversely bent end portions and a pair of radially extending legs having openings formed near their ends; the fingers and legs alternating circumferentially of the ring and being spaced 90 degrees from each other; the cage also including a second section, the second section being substantially identical with the first section and having the reversely bent portions of the fingers interlocking with the openings in the legs of the first section, the openings of the legs in the second section engaging the reversely bent portions of the fingers of the first section, the bosses of the first and second sections being axially aligned for engagement with the longitudinal groove in the shaft; and a nut engagable with the threads on the shaft and with one of the sections such that, upon tightening the nut, the sections are clamped between the nut and the enlarged end and are compressed axially, thereby expanding the fingers radially outwardly of the shaft.
Claim 4
Dependent Claim
231 words
An intramedullary pin, comprising: an elongate shaft having a longitudinally extending groove and a threaded portion formed intermediate its ends; the shaft having an enlarged, flattened end; an expansible cage adapted to be secured to the shaft; the cage including a first section in the form of a ring encircling the shaft; the ring including a boss extending into the groove; the first section also including a pair of radially extending fingers having reversely bent end portions and a pair of radially extending legs having openings formed near their ends; the fingers and legs alternating circumferentially of the ring and being spaced 90 degrees from each other; the cage also including a second section, the second section being substantially identical with the first section and having the reversely bent portions of the fingers interlocking with the openings in the legs of the first section, the openings of the legs in the second section engaging the reversely bent portions of the fingers of the first section, the bosses of the first and second sections being axially aligned for engagement with the longitudinal groove in the shaft; and a nut engagable with the threads on the shaft and with one of the sections such that, upon tightening the nut, the sections are clamped between the nut and the enlarged end and are compressed axially, thereby expanding the fingers radially outwardly of the shaft.
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) | 1986-04-11 | 1986-10-11 | 1987-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-11 | 1990-10-11 | 1991-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-11 | 1994-10-11 | 1995-04-12 | $7700.00 | Window Closed / Lapsed |