Patent US4466427A successfully refreshed from Google Patents.
US4466427A
Expired / Lapsed
US
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Traction device
Assignee: GRANBERG PUMP AND METER Ltd
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Filing: 1981-10-02
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Granted: 1984-08-21
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Expires: 2001-10-02
Abstract
Abstract A portable traction device includes a frame which has an upper surface to support the individual to be subjected to traction. The frame has at least one mounting point at one end of the upper surface. At least one tension member emanates from the frame and has a free end passing through the mounting point and back toward the upper surface of the frame. The free end of the tension member is secured to the individual who is to be subjected to traction. A takeup mechanism for applying tension to the tension member is located on the frame. The takeup mechanism is activated, usually by the patient. The activation mechanism is adapted to disengage when the applied tension reaches a preselected value, while maintaining the preselected tension on the tension member.
Inventors
- 👤 Elof Granberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:27
CPC Classifications
A; A61; A61H; A61H1/00; A61H1/02; A61H1/0218
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
201 words
A traction device comprising: a portable frame having an upper surface adapted to support an individual to be subjected to traction, and a pair of rods releasably engageable with the frame proximate the opposite ends of the upper surface and providing mounting points spaced from said upper surface; a pair of tension members emanating from the frame and having free ends passing through the respective mounting points and back toward the upper surface of the frame; a pelvic strap assembly attachable to the free end of one of the tension members and secured to the individual to provide pelvic traction, and a cervical halter attachable to the free end of the other tension member and secured to the individual to provide cervical traction; a hydraulic cylinder mounted on the frame and capable of being secured to the tension members so that traction is applied to the individual when the cylinder is actuated; a manually-operated pump mounted to the frame and fluidly connected to hydraulically actuate the cylinder; means for adjustably limiting the maximum force applied to the cylinder by the pump while maintaining that maximum force until released; and means for releasing the force applied by the pump to the cylinder.
Claim 2
Dependent Claim
201 words
A traction device comprising: a portable frame having an upper surface adapted to support an individual to be subjected to traction, and a pair of rods releasably engageable with the frame proximate the opposite ends of the upper surface and providing mounting points spaced from said upper surface; a pair of tension members emanating from the frame and having free ends passing through the respective mounting points and back toward the upper surface of the frame; a pelvic strap assembly attachable to the free end of one of the tension members and secured to the individual to provide pelvic traction, and a cervical halter attachable to the free end of the other tension member and secured to the individual to provide cervical traction; a hydraulic cylinder mounted on the frame and capable of being secured to the tension members so that traction is applied to the individual when the cylinder is actuated; a manually-operated pump mounted to the frame and fluidly connected to hydraulically actuate the cylinder; means for adjustably limiting the maximum force applied to the cylinder by the pump while maintaining that maximum force until released; and means for releasing the force applied by the pump to the cylinder.
Claim 3
Dependent Claim
55 words
The traction device of claim 1, wherein the rod providing the mounting point for the tension member associated with the cervical halter has a vertical portion, and wherein the mounting point associated with cervical traction is movable along the vertical portion of said rod to vary the angle at which the cervical traction is applied.
Claim 4
Dependent Claim
33 words
The traction device of claim 1, further including a countertraction belt attachable to the patient below the rib cage and connected to the frame to provide countertraction during the application to pelvic traction.
Claim 5
Dependent Claim
41 words
The traction device of claim 1, wherein the means for adjustably limiting the maximum force applied is a relief valve having an adjustable set point and connected to relieve hydraulic pressure applied by the pump when it exceeds the set point.
Claim 6
Dependent Claim
28 words
The traction device of cliam 1, wherein the means for releasing the force applied by the pump is a valve connected to relieve hydraulic pressure in the cylinder.
Claim 7
Dependent Claim
28 words
The traction device of cliam 1, wherein the means for releasing the force applied by the pump is a valve connected to relieve hydraulic pressure in the cylinder.
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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) | 1987-08-21 | 1988-02-20 | 1988-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-21 | 1992-02-20 | 1992-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-21 | 1996-02-20 | 1996-08-21 | $7700.00 | Window Closed / Lapsed |