Patent US3707731A successfully refreshed from Google Patents.
US3707731A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Artificial leg
Assignee: Individual
•
Filing: 1971-06-09
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Granted: 1973-01-02
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Expires: 1991-06-09
Abstract
Abstract An artificial leg constructed to be particularly adapted for use by amputees engaged in activities requiring particular degrees of freedom of movement, such as golf. The leg comprises a lightweight socket adapted to receive a stump and a leg part with a joint between the socket and leg part allowing 360* of relative rotation therebetween. The socket and leg part are rigidly aligned. At the lower end of the leg part is a foot with a joint between the foot and leg part allowing lateral tilting of the leg relative to the foot and to provide a cushioning shock absorber effect. The foot member is round and symmetrical about its center, thus, avoiding any problem of foot alignment with the socket and leg stump.
Inventors
- 👤 R Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:12
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/50; A61F2/60; A61F2/601
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
80 words
An artificial leg comprising a socket adapted to receive a stump; a leg part extending from said socket and having rigid, inflexible alignment with said socket along a longitudinal vertical axis; and means providing a joint between said leg part and said socket including a bearing providing for substantially 360* freedom of rotation as between said socket and leg part about said axis, said joint means maintaining said rigid alignment at all rotative positions between said socket and leg part.
Claim 2
Dependent Claim
80 words
An artificial leg comprising a socket adapted to receive a stump; a leg part extending from said socket and having rigid, inflexible alignment with said socket along a longitudinal vertical axis; and means providing a joint between said leg part and said socket including a bearing providing for substantially 360* freedom of rotation as between said socket and leg part about said axis, said joint means maintaining said rigid alignment at all rotative positions between said socket and leg part.
Claim 3
Dependent Claim
40 words
An artificial leg as in claim 1, including a foot member at the end of said leg part, said leg part being joined to the foot member at the center thereof and the foot member being symmetrical about said center.
Claim 4
Dependent Claim
36 words
An artificial leg as in claim 2, wherein said foot member has means to provide shock absorbing cushioning resiliency and to allow tilt of the leg part from the vertical with respect to the foot member.
Claim 5
Dependent Claim
16 words
An artificial leg as in claim 1, including means for adjusting said leg part for length.
Claim 6
Dependent Claim
37 words
An artificial leg as in claim 3, wherein said foot member is circular, said foot member having a bottom layer of resilient cushioning material and means providing resilient attachment of the leg part to the foot member.
Claim 7
Dependent Claim
58 words
An artificial leg as in claim 3, wherein the end of said leg part is attached centrally within the foot member, the end of the leg part having attachment to the foot member, and attachment means comprising interleaving members surrounding the end of the leg part, said interleaving members comprising laminations of resilient cushioning material and semi-rigid material.
Claim 8
Dependent Claim
17 words
An artificial leg as in claim 6, comprising a covering of saddle leather covering said foot member.
Claim 9
Dependent Claim
29 words
An artificial leg as in claim 6, said covering having a flat bottom surface, said resilient cushioning material being secured to the flat bottom portion by being glued thereto.
Claim 10
Dependent Claim
55 words
An artificial leg as in claim 2, said leg part being tubular, and attachment means between the leg part and foot member including cylindrical members fitting within, said leg part having juxtaposed bevelled cam surfaces, and means to draw said cylindrical members together whereby to produce relative lateral movement for locking to said leg part.
References Cited (Backward Citations)
US507453A
Cited
US612282A
Cited
GB214096A
Cited
DE847794C
Cited
US2897512A
Cited
GB978586A
Cited
FR1445102A
Cited
US3461464A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |