US5325558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wheelchair ramp apparatus
Assignee: Individual
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Filing: 1993-10-04
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Granted: 1994-07-05
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Expires: 2013-10-04
Abstract
Abstract A wheelchair ramp structure is arranged to include first and second U-shaped tracks hingedly mounted relative to one another cooperative and parallel to third and fourth U-shaped tracks, wherein the first and third U-shaped tracks include an adjusting connector link directed therebetween to provide for adjustment and maintaining such adjustment in a spatial relationship of the first and second tracks relative to the third and fourth tracks. The first and second tracks are arranged for hinged mounting relative to one another, as well as the third and fourth tracks permitting ease of storage of the organization during periods of non-use.
Inventors
- 👤 Brent J. Labreche
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:09
CPC Classifications
B; B65; B65G; B65G69/00; B65G69/28; B65G69/30; A; A61; A61G; A61G3/00; A61G3/02; A61G3/06; A61G3/061
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
413 words
A wheel chair ramp apparatus, comprising, a first ramp member spaced from a second ramp member, the first ramp member including a first U-shaped track and a second U-shaped track, wherein the first U-shaped track includes a first track first end plate projecting beyond the first U-shaped track, and a first U-shaped track second end hinge hingedly mounting the first U-shaped track to the second U-shaped track, and the second ramp member includes a third U-shaped track, with a third U-shaped first end plate extending beyond the third U-shaped track, and a third U-shaped track second end hinge hingedly securing the third U-shaped track to a fourth U-shaped track, with the first U-shaped track having a first floor, the second track having a second floor, with the first floor and the second floor in a coplanar relationship in a first position and arranged in a parallel spaced relationship in a second position, with the third track having a third floor, the fourth track having a fourth floor, with the third floor and the fourth floor arranged in a coplanar relationship in the first position, and the third floor and the fourth floor arranged in a parallel spaced relationship in the second position, and the first U-shaped track having first track side walls, the third track having third track side walls, wherein one of said first track side walls is arranged in a facing relationship to a further one of said third track side walls, with a connector link adjustably directed between the first U-shaped track and the third U-shaped track and mounted to one of said first U-shaped track side walls and to a facing one of said third U-shaped track side walls, wherein the connecting link includes a first L-shaped link fixedly mounted to said one of said first track side walls, and a second L-shaped link mounted fixedly to one of said third track side walls, and with a first adjuster rod directed into the first L-shaped link and a second adjuster rod directed into the second L-shaped link, wherein the first adjuster rod and the second adjuster rod are arranged in a coaxially aligned relationship relative to one another, with the first adjuster rod having a right hand thread, the second adjuster rod having a left hand thread, and an internally threaded adjuster sleeve having a sleeve right hand threaded portion threadedly receiving the first adjuster rod, and a sleeve left hand threaded portion threadedly receiving the second adjuster rod.
Claim 2
Dependent Claim
413 words
A wheel chair ramp apparatus, comprising, a first ramp member spaced from a second ramp member, the first ramp member including a first U-shaped track and a second U-shaped track, wherein the first U-shaped track includes a first track first end plate projecting beyond the first U-shaped track, and a first U-shaped track second end hinge hingedly mounting the first U-shaped track to the second U-shaped track, and the second ramp member includes a third U-shaped track, with a third U-shaped first end plate extending beyond the third U-shaped track, and a third U-shaped track second end hinge hingedly securing the third U-shaped track to a fourth U-shaped track, with the first U-shaped track having a first floor, the second track having a second floor, with the first floor and the second floor in a coplanar relationship in a first position and arranged in a parallel spaced relationship in a second position, with the third track having a third floor, the fourth track having a fourth floor, with the third floor and the fourth floor arranged in a coplanar relationship in the first position, and the third floor and the fourth floor arranged in a parallel spaced relationship in the second position, and the first U-shaped track having first track side walls, the third track having third track side walls, wherein one of said first track side walls is arranged in a facing relationship to a further one of said third track side walls, with a connector link adjustably directed between the first U-shaped track and the third U-shaped track and mounted to one of said first U-shaped track side walls and to a facing one of said third U-shaped track side walls, wherein the connecting link includes a first L-shaped link fixedly mounted to said one of said first track side walls, and a second L-shaped link mounted fixedly to one of said third track side walls, and with a first adjuster rod directed into the first L-shaped link and a second adjuster rod directed into the second L-shaped link, wherein the first adjuster rod and the second adjuster rod are arranged in a coaxially aligned relationship relative to one another, with the first adjuster rod having a right hand thread, the second adjuster rod having a left hand thread, and an internally threaded adjuster sleeve having a sleeve right hand threaded portion threadedly receiving the first adjuster rod, and a sleeve left hand threaded portion threadedly receiving the second adjuster rod.
Claim 3
Dependent Claim
115 words
An apparatus as set forth in claim 1 including a boss member mounted to the sleeve exteriorly thereof, with the boss member including a first spring plate extending over the first adjuster rod and a second spring plate extending over the second adjuster rod, the first adjuster rod having a plurality of first annular discs mounted about the first adjuster rod concentrically thereof, and second annular discs mounted to the second adjuster rod concentrically thereof, with the first spring plate having a first bifurcated engaging leg arranged to receive one of said first annular discs, and the second spring plate including a second bifurcated engaging leg arranged to receive one of said second annular discs.
Claim 4
Dependent Claim
162 words
An apparatus as set forth in claim 2 wherein the second U-shaped track includes at least one second track side wall, wherein the at least one second track side wall includes a position boss fixedly mounted thereon, and the position boss includes a locking rod slidably directed through the position boss, and the locking rod including a spline fixedly mounted onto the locking rod, with the locking rod including a locking rod lowermost pointed end and a locking rod upper end, wherein the pointed end and the upper end are on opposed sides of the position boss, and the upper end includes a handle fixedly mounted to the locking rod obliquely mounted thereto, and the position boss includes a spline receiving slot receiving the spline slidably therethrough, and the locking rod including a spring plate fixedly mounted to the locking rod between the position boss and the lowermost pointed end, and a spring captured between the spring plate and the position boss.
References Cited (Backward Citations)
US3532058A
Cited
US3820912A
Cited
US4528711A
Cited
FR2597129A1
Cited
FR2611682A1
Cited
US5143478A
Cited
US4874284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-04 | 1998-01-03 | 1998-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-04 | 2002-01-03 | 2002-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-04 | 2006-01-03 | 2006-07-05 | $7700.00 | Window Closed / Lapsed |