Patent US3961881A successfully refreshed from Google Patents.
Patent US4912796A successfully refreshed from Google Patents.
US4912796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable height wheelchair ramp with supporting legs
Assignee: Individual
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Filing: 1989-01-13
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Granted: 1990-04-03
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Expires: 2009-01-13
Abstract
Abstract This invention discloses a new, novel and unique adjustable height wheelchair ramp with supporting legs comprised of a pair of ramps, each end of each ramp containing a ramp end section and attached to each ramp is a height adjustment and supporting mechanism to support the ramps when in use. This height adjustment and supporting mechanism is comprised of a first and second leg and a foot which supports the ramps when they are in use. In conventional wheelchair ramps, especially where long distances are being spanned by the ramps, conventional ramps will tend to deflect resulting in a dangerous condition for the individual using the ramp and also limiting the life and utility of the ramp. By use of the height adjustment ramp support of the adjustable height, wheelchair ramp with supporting legs the ramp can be used for a large range of heights while still providing a stable, secure, relatively light wheelchair ramp system.
Inventors
- 👤 Robert Crump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:37
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: 21
Claim 1
Independent Claim
119 words
An adjustable height wheelchair ramp with supporting legs system comprising: (a) a pair of ramps each containing a bottom and two sides, wherein each side contains a plurality of adjustment openings and wherein each ramp is composed of a plurality of telescoping sections; (b) attached to each end of each ramp is a ramp end section; and (c) attached to each ramp is a height adjustment mechanism comprised of a first and second leg and a generally flat foot wherein said first leg is secured to the bottom of the ramp and to the foot and wherein said second leg is secured to the foot and contains leg hooks which are insertable in the adjustment openings of the ramp.
Claim 2
Dependent Claim
119 words
An adjustable height wheelchair ramp with supporting legs system comprising: (a) a pair of ramps each containing a bottom and two sides, wherein each side contains a plurality of adjustment openings and wherein each ramp is composed of a plurality of telescoping sections; (b) attached to each end of each ramp is a ramp end section; and (c) attached to each ramp is a height adjustment mechanism comprised of a first and second leg and a generally flat foot wherein said first leg is secured to the bottom of the ramp and to the foot and wherein said second leg is secured to the foot and contains leg hooks which are insertable in the adjustment openings of the ramp.
Claim 3
Dependent Claim
153 words
An adjustable height wheelchair ramp with supporting legs system comprising: (a) a pair of ramps each containing a bottom and two sides wherein each side contains a plurality of adjustment openings and wherein each ramp is comprised of a plurality of telescoping sections; (b) attached to each end of each ramp is a removable ramp end section; and (c) attached to each ramp is a height adjustment mechanism comprised of a first and second leg and a generally flat foot wherein said first leg is comprised of a bottom section secured to the foot, two side sections and a top portion which are secured to the bottom of the ramp and wherein the second leg is an upturned, generally C-shaped member comprised of a bottom section secured to the foot, two arm sections and two leg hook members secured to the arm sections which are insertable in the adjustment openings in the ramp.
Claim 4
Dependent Claim
153 words
An adjustable height wheelchair ramp with supporting legs system comprising: (a) a pair of ramps each containing a bottom and two sides wherein each side contains a plurality of adjustment openings and wherein each ramp is comprised of a plurality of telescoping sections; (b) attached to each end of each ramp is a removable ramp end section; and (c) attached to each ramp is a height adjustment mechanism comprised of a first and second leg and a generally flat foot wherein said first leg is comprised of a bottom section secured to the foot, two side sections and a top portion which are secured to the bottom of the ramp and wherein the second leg is an upturned, generally C-shaped member comprised of a bottom section secured to the foot, two arm sections and two leg hook members secured to the arm sections which are insertable in the adjustment openings in the ramp.
Claim 5
Dependent Claim
21 words
The adjustable height wheelchair ramp with supporting legs system of claim 1 wherein the ramps are comprised of three telescoping sections.
Claim 6
Dependent Claim
20 words
The adjustable height wheelchair ramp with supporting legs system of claim 1 wherein the ramp end sections can be reversed.
Claim 7
Dependent Claim
21 words
The adjustable height wheelchair ramp with supporting legs system of claim 1 wherein the ramps are manufactured from high strength aluminum.
Claim 8
Dependent Claim
52 words
The adjustable height wheelchair ramp with supporting legs system of claim 1 wherein the foot is comprised of a foot channel secured to a flat bottom section wherein said flat bottom section is comprised of a generally flat, rectangular metal piece and a foot slip resistant pad secured to said metal piece.
Claim 9
Dependent Claim
25 words
The adjustable height wheelchair ramp with supporting legs system of claim 1 wherein there is provided a pin secured to the ramp on a chain.
Claim 10
Dependent Claim
25 words
The adjustable height wheelchair ramp with supporting legs system of claim 1 wherein the ramps are secured in their open position by bullet catch locks.
Claim 11
Dependent Claim
44 words
The adjustable height wheelchair ramp with supporting legs system of claim 1 wherein the top portion of the first leg is secured to the bottom of the ramp by placing it within a bottom channel which is secured to the bottom of the ramp.
Claim 12
Dependent Claim
21 words
The adjustable height wheelchair ramp with supporting legs system of claim 2 wherein the ramps are comprised of three telescoping sections.
Claim 13
Dependent Claim
20 words
The adjustable height wheelchair ramp with supporting legs system of claim 2 wherein the ramp end sections can be reversed.
Claim 14
Dependent Claim
21 words
The adjustable height wheelchair ramp with supporting legs system of claim 2 wherein the ramps are manufactured from high strength aluminum.
Claim 15
Dependent Claim
52 words
The adjustable height wheelchair ramp with supporting legs system of claim 2 wherein the foot is comprised of a foot channel secured to a flat bottom section wherein said flat bottom section is comprised of a generally flat, rectangular metal piece and a foot slip resistant pad secured to said metal piece.
Claim 16
Dependent Claim
25 words
The adjustable height wheelchair ramp with supporting legs system of claim 2 wherein there is provided a pin secured to the ramp on a chain.
Claim 17
Dependent Claim
25 words
The adjustable height wheelchair ramp with supporting legs system of claim 2 wherein the ramps are secured in their open position by bullet catch locks.
Claim 18
Dependent Claim
170 words
An adjustable height wheelchair ramp with supporting legs system comprising: (a) a pair of ramps each containing a bottom and two sides, wherein each side contains a plurality of adjustment openings and wherein each ramp is composed of a plurality of telescoping sections; (b) attached to each end of each ramp is a ramp end section; and (c) attached to each ramp is a height adjustment mechanism comprised of a first and second leg and a generally flat foot wherein said first leg is secured to the bottom of the ramp and to the foot, wherein said second leg is secured to the foot and contains leg hooks which are insertable in the adjustment openings of the ramp, wherein the foot is comprised of a foot channel secured to a flat bottom section wherein said flat bottom section is comprised of a generally flat, rectangular metal piece and a foot slip resistant pad secured to said metal piece, and wherein there is provided a flat spring within the foot channel.
Claim 19
Dependent Claim
170 words
An adjustable height wheelchair ramp with supporting legs system comprising: (a) a pair of ramps each containing a bottom and two sides, wherein each side contains a plurality of adjustment openings and wherein each ramp is composed of a plurality of telescoping sections; (b) attached to each end of each ramp is a ramp end section; and (c) attached to each ramp is a height adjustment mechanism comprised of a first and second leg and a generally flat foot wherein said first leg is secured to the bottom of the ramp and to the foot, wherein said second leg is secured to the foot and contains leg hooks which are insertable in the adjustment openings of the ramp, wherein the foot is comprised of a foot channel secured to a flat bottom section wherein said flat bottom section is comprised of a generally flat, rectangular metal piece and a foot slip resistant pad secured to said metal piece, and wherein there is provided a flat spring within the foot channel.
Claim 20
Dependent Claim
204 words
An adjustable height wheelchair ramp with supporting legs system comprising: (a) a pair of ramps each containing a bottom and two sides wherein each side contains a plurality of adjustment openings and wherein each ramp is comprised of a plurality of telescoping sections; (b) attached to each end of each ramp is a removable ramp end section; and (c) attached to each ramp is a height adjustment mechanism comprised of a first and second leg and a generally flat foot wherein said first leg is comprised of a bottom section secured to the foot, two side sections and a top portion which are secured to the bottom of the ramp, wherein the second leg is an upturned, generally C-shaped member comprised of a bottom section secured to the foot, two arm sections and two leg hook members secured to the arm sections which are insertable in the adjustment openings in the ramp, wherein the foot is comprised of a foot channel secured to a flat bottom section wherein said flat bottom section is comprised of a generally flat, rectangular metal piece and a foot slip resistant pad secured to said metal piece, and wherein there is provided a flat spring within the foot channel.
Claim 21
Dependent Claim
204 words
An adjustable height wheelchair ramp with supporting legs system comprising: (a) a pair of ramps each containing a bottom and two sides wherein each side contains a plurality of adjustment openings and wherein each ramp is comprised of a plurality of telescoping sections; (b) attached to each end of each ramp is a removable ramp end section; and (c) attached to each ramp is a height adjustment mechanism comprised of a first and second leg and a generally flat foot wherein said first leg is comprised of a bottom section secured to the foot, two side sections and a top portion which are secured to the bottom of the ramp, wherein the second leg is an upturned, generally C-shaped member comprised of a bottom section secured to the foot, two arm sections and two leg hook members secured to the arm sections which are insertable in the adjustment openings in the ramp, wherein the foot is comprised of a foot channel secured to a flat bottom section wherein said flat bottom section is comprised of a generally flat, rectangular metal piece and a foot slip resistant pad secured to said metal piece, and wherein there is provided a flat spring within the foot channel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-02 | 1993-10-02 | 1994-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-02 | 1997-10-02 | 1998-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-02 | 2001-10-02 | 2002-04-03 | $7700.00 | Window Closed / Lapsed |