Patent US5054476A successfully refreshed from Google Patents.
US5054476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Orthosis for assistance in walking
Assignee: Petrofsky Res Inc
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Filing: 1990-08-10
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Granted: 1991-10-08
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Expires: 2010-08-10
Abstract
Abstract An orthosis for assistance in walking includes a pair of flexible risers and a flexible pelvic band. Each time a leg moves forward the pelvic band is twisted and the risers are bent, thereby storing energy. At the end of the step the pelvic band and the risers tend to resume undistorted configuration, and this thrusts the opposite foot forward. An improved hip joint is also disclosed for use in combination with such risers and pelvic band. The joint has a lock plate which may be locked to a riser and also to a leg brace connected thereto.
Inventors
- 👤 Jerrold S. Petrofsky
- 👤 Wes Piotrowski
- 👤 Jannike Petrovska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:18
CPC Classifications
A; A61; A61F; A61F5/00; A61F5/01; A61F5/0102; A61F5/0123; A61F5/0125
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
134 words
An orthosis for stimulated walking comprising a pair of leg braces including lockable hip and knee joints for supporting the legs of an assisted person, a thoracic band for attachment to the upper body of said person, a pair of risers having lower ends secured to said leg braces and upper ends secured to said thoracic band, and a pelvic band shaped to fit around the body of said person and interconnect the lower ends of said risers; characterized in that said pelvic band conforms to the body of the wearer and is constructed from an energy storing material which is sufficiently flexible to twist during walking movement by said person and sufficiently stiff to untwist at the end of a step with a force which will initiate forward movement of a rearward leg.
Claim 2
Dependent Claim
134 words
An orthosis for stimulated walking comprising a pair of leg braces including lockable hip and knee joints for supporting the legs of an assisted person, a thoracic band for attachment to the upper body of said person, a pair of risers having lower ends secured to said leg braces and upper ends secured to said thoracic band, and a pelvic band shaped to fit around the body of said person and interconnect the lower ends of said risers; characterized in that said pelvic band conforms to the body of the wearer and is constructed from an energy storing material which is sufficiently flexible to twist during walking movement by said person and sufficiently stiff to untwist at the end of a step with a force which will initiate forward movement of a rearward leg.
Claim 3
Dependent Claim
20 words
An orthosis according to claim 1 characterized in that said pelvic band comprises a stress-free graphite and fiberglass cloth laminate.
Claim 4
Dependent Claim
18 words
An orthosis according to claim 2 characterized in that said graphite cloth is permeated by a thermosetting resin.
Claim 5
Dependent Claim
16 words
An orthosis according to claim 3 characterized in that said thermosetting resin is an acrylic resin.
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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) | 1994-10-07 | 1995-04-08 | 1995-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-10-07 | 1999-04-08 | 1999-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-10-07 | 2003-04-08 | 2003-10-08 | $7700.00 | Window Closed / Lapsed |