US4949960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butterfly chair stretching apparatus
Assignee: BALLET DESIGN Inc A CORP OF CT
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Filing: 1989-04-14
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Granted: 1990-08-21
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Expires: 2009-04-14
Abstract
Abstract A stretching apparatus for stretching leg and hip muscles and increasing rotation of the leg in the hip joint of a human user. Flexible straps attach two body support platforms to a frame. Movement of one of the body support platforms to a reclining position against the force of the straps forces the knees of a user outward, thus stretching the leg and hip muscles and causing the legs to rotate in the hip joints, increasing flexibility in the joints.
Inventors
- 👤 Sven Harlan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:56
CPC Classifications
A; A63; A63B; A63B23/00; A63B23/035; A63B23/04; A63B23/0482; A63B2208/00; A63B2208/02; A63B2208/0228; Y; Y10; Y10S; Y10S482/00; Y10S482/907
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
167 words
A muscle and joint stretching apparatus for stretching human leg and hip muscles and increasing rotation of the leg in the hip joint of a user when in a reclining position, said apparatus comprising: (a) two body support platforms connected end-to-end at an angle .arranged such that a user may sit upright on a first support body platform and rest the back of the body on a second platform or lie on the top sides of both platforms; (b) a frame connected to one end of the first body support platform; (c) a crossbar connected to the second body support platform; and (d) a pair flexible straps, each strap connected to said crossbar at one end and said frame at the other end, whereby upon expansion of the angle between the body support platforms by the reclining of the user against the force of the flexible strap, the user's leg muscles and hip joint are stretched, and the user's leg is rotated outwardly in the hip joint.
Claim 2
Dependent Claim
167 words
A muscle and joint stretching apparatus for stretching human leg and hip muscles and increasing rotation of the leg in the hip joint of a user when in a reclining position, said apparatus comprising: (a) two body support platforms connected end-to-end at an angle .arranged such that a user may sit upright on a first support body platform and rest the back of the body on a second platform or lie on the top sides of both platforms; (b) a frame connected to one end of the first body support platform; (c) a crossbar connected to the second body support platform; and (d) a pair flexible straps, each strap connected to said crossbar at one end and said frame at the other end, whereby upon expansion of the angle between the body support platforms by the reclining of the user against the force of the flexible strap, the user's leg muscles and hip joint are stretched, and the user's leg is rotated outwardly in the hip joint.
Claim 3
Dependent Claim
19 words
Apparatus according to claim 1, further comprising means on said frame for preventing the apparatus from sliding during use.
Claim 4
Dependent Claim
19 words
Apparatus according to claim 1, wherein said crossbar is V-shaped at a location behind said second body support platform.
Claim 5
Independent Claim
109 words
A method of stretching leg and hip muscles and increasing rotation of the leg in the hip joint of the human user, comprising: (a) arranging two body support platforms connected end-to-end at an angle such that a user lies or sits on both platforms; (b) arranging two flexible straps over the knees of a human user such that when the angle between said body support platforms increases, the straps become taut around the knees; and (c) causing the angle between the platforms to increase, thereby forcing the straps to cause the knees to point outward, the muscles to become stretched and the legs to rotate in the hip joints.
Claim 6
Independent Claim
109 words
A method of stretching leg and hip muscles and increasing rotation of the leg in the hip joint of the human user, comprising: (a) arranging two body support platforms connected end-to-end at an angle such that a user lies or sits on both platforms; (b) arranging two flexible straps over the knees of a human user such that when the angle between said body support platforms increases, the straps become taut around the knees; and (c) causing the angle between the platforms to increase, thereby forcing the straps to cause the knees to point outward, the muscles to become stretched and the legs to rotate in the hip joints.
References Cited (Backward Citations)
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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) | 1993-08-20 | 1994-02-19 | 1994-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-20 | 1998-02-19 | 1998-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-20 | 2002-02-19 | 2002-08-21 | $7700.00 | Window Closed / Lapsed |