US5033457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air assisted medical devices
Assignee: P Tech LLC
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Filing: 1989-06-23
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Granted: 1991-07-23
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Expires: 2009-06-23
Abstract
Abstract An air assisted device for positioning or moving a limb or a joint uses compressed air as a motive force. In a first embodiment, the air assisted device is a one piece air bag with bellows or accordion-like construction to allow controlled variable degrees of abduction. The bag is placed between a limb to be positioned and a relatively fixed body part or other surface. As compressed air enters the bag, the bag expands and moves the limb away from the body part or other surface. If the bag is maintained in an expanded condition, it immobilizes the limb relative to the body part or other surface. As the bag deflates, the limb returns to its original position. In a second embodiment, the device utilizes a pneumatic piston and cylinder unit to provide the motive force for positioning two relatively movable parts. As compressed air is forced into the cylinder, the piston moves outwardly, moving one of the relatively movable parts away from the other part. Relative movement of the parts moves the limb toward or away from the body part or other surface. The air assisted device may also be used to resist motion of a limb.
Inventors
- 👤 Peter M. Bonutti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:55
CPC Classifications
A; A61; A61F; A61F5/00; A61F5/01; A61H; A61H1/00; A61H1/02; A61H2201/00; A61H2201/01; A61H2201/0173; A61H2201/018; A61H2201/12; A61H2201/1238; A61H2201/1246
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
192 words
Apparatus for assisting or resisting movement of a body part relative to a relatively fixed surface comprising a one-piece expandable air bag for placement between the body part and the relatively fixed surface and having first and second relatively movable surfaces, said first surface for contact with the body part, said second surface for contact with the relatively fixed surface, accordion-like expansion means interconnecting said first and second relatively movable surfaces for assisting or resisting movement of said first surface relative to said second surface upon varying the amount of air in said air bag, control means for controlling the amount of air in said air bag and means for supplying pressurized air into said air bag, wherein said means for controlling includes valve means for controlling flow of air into and out of said air bag and settable timer means for controlling the flow of air into and out of said airbag in accordance with a predetermined time sequence, and wherein said accordion-like expansion means includes a plurality of expansion means portions having differing degrees of flexibility to vary the rate of relative movement of separate portions of said air bag.
Claim 2
Dependent Claim
192 words
Apparatus for assisting or resisting movement of a body part relative to a relatively fixed surface comprising a one-piece expandable air bag for placement between the body part and the relatively fixed surface and having first and second relatively movable surfaces, said first surface for contact with the body part, said second surface for contact with the relatively fixed surface, accordion-like expansion means interconnecting said first and second relatively movable surfaces for assisting or resisting movement of said first surface relative to said second surface upon varying the amount of air in said air bag, control means for controlling the amount of air in said air bag and means for supplying pressurized air into said air bag, wherein said means for controlling includes valve means for controlling flow of air into and out of said air bag and settable timer means for controlling the flow of air into and out of said airbag in accordance with a predetermined time sequence, and wherein said accordion-like expansion means includes a plurality of expansion means portions having differing degrees of flexibility to vary the rate of relative movement of separate portions of said air bag.
Claim 3
Dependent Claim
127 words
Apparatus for assisting or resisting movement of a body part relative to a relatively fixed surface comprising a one-piece expandable air bag for placement between the body part and the relatively fixed surface and having first and second relatively movable surfaces, said first surface for contact with the body part, said second surface for contact with the relatively fixed surface, and accordion-like expansion means interconnecting said first and second relatively movable surfaces for assisting or resisting movement of said first surface relative to said second surface upon varying the amount of air in said air bag, wherein said accordion-like expansion means includes first and second expansion means portions having differing degrees of flexibility to vary the rate of relative movement of separate portions of said air bag.
Claim 4
Dependent Claim
127 words
Apparatus for assisting or resisting movement of a body part relative to a relatively fixed surface comprising a one-piece expandable air bag for placement between the body part and the relatively fixed surface and having first and second relatively movable surfaces, said first surface for contact with the body part, said second surface for contact with the relatively fixed surface, and accordion-like expansion means interconnecting said first and second relatively movable surfaces for assisting or resisting movement of said first surface relative to said second surface upon varying the amount of air in said air bag, wherein said accordion-like expansion means includes first and second expansion means portions having differing degrees of flexibility to vary the rate of relative movement of separate portions of said air bag.
Claim 5
Dependent Claim
20 words
Apparatus as defined in claim 10 wherein said accordion-like expansion means defines a plurality of chambers in said air bag.
Claim 6
Dependent Claim
20 words
Apparatus as defined in claim 3 wherein at least two of said plurality of chambers have different rates of expansion.
References Cited (Backward Citations)
US2245909A
Cited
US2998817A
Cited
US3492988A
Cited
US3795242A
Cited
US3811431A
Cited
US3821951A
Cited
US3982531A
Cited
US4003374A
Cited
US4343302A
Cited
US4248421A
Cited
US4370975A
Cited
US4418690A
Cited
US4596240A
Cited
US4573453A
Cited
US4635931A
Cited
US4671258A
Cited
US4558692A
Cited
US4867140A
Cited
US4865020A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-22 | 1995-01-21 | 1995-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-22 | 1999-01-21 | 1999-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-22 | 2003-01-21 | 2003-07-23 | $7700.00 | Window Closed / Lapsed |