US4817224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable doorway ramp apparatus
Assignee: Individual
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Filing: 1988-09-08
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Granted: 1989-04-04
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Expires: 2008-09-08
Abstract
Abstract An adjustable doorway ramp apparatus is set forth wherein a doorway ramp is of a triangular wedge member configuration and includes a first, second, third, fourth, fifth, sixth, and seventh ramp associated therewith. The first ramp is positioned at an uppermost portion of the ramp apparatus and is pivotally mounted in forwardmost portion thereof with a fourth ramp pivotally mounted displaceably rearwardly therefrom by a rack and pinion arrangement. A second ramp is in underlying position to said first ramp and is of a trapezoidal configuration and releasably securable to a third ramp of trapezoidal configuration dimension substantially greater than that of said second ramp. A fifth ramp is positionable between said first and second ramps to arcuately position said first ramp relative to said second ramp with a sixth ramp and seventh ramp slidably mounted within said third ramp for positioning about an associated door sill.
Inventors
- 👤 Daniel Visnaw
- 👤 Dale Lockwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:19
CPC Classifications
B; B65; B65G; B65G69/00; B65G69/28; B65G69/30; Y; Y10; Y10S; Y10S52/00; Y10S52/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
130 words
An adjustable wedge-shaped ramp apparatus positionable on a first level relative to a vertically spaced upper level comprising, a first wedge-shaped member including a lower planar face, a rear planar face orthogonally formed to said lower face, and an upper surface joining said rear and lower planar faces, and said first member pivotally joined at an edge, formed by the junction of the upper surface and the lower planar face, to an underlying second member wherein the pivotal joining includes a plurality of hinges secured to said upper surface of said first member and to an upper surface of said second member, and a third member underlying said second member and mechanically and removably secured to said second member, and said second and third members formed of trapezoidal cross-sectional configurations.
Claim 2
Dependent Claim
130 words
An adjustable wedge-shaped ramp apparatus positionable on a first level relative to a vertically spaced upper level comprising, a first wedge-shaped member including a lower planar face, a rear planar face orthogonally formed to said lower face, and an upper surface joining said rear and lower planar faces, and said first member pivotally joined at an edge, formed by the junction of the upper surface and the lower planar face, to an underlying second member wherein the pivotal joining includes a plurality of hinges secured to said upper surface of said first member and to an upper surface of said second member, and a third member underlying said second member and mechanically and removably secured to said second member, and said second and third members formed of trapezoidal cross-sectional configurations.
Claim 3
Dependent Claim
49 words
An adjustable wedge-shaped ramp apparatus as set forth in claim 1 wherein said first member includes a pivotally mounted fourth member positionable within a cavity of said first member and movable between a first position interiorly of said first member to a second position exteriorly of said first member.
Claim 4
Dependent Claim
56 words
An adjustable wedge-shaped ramp apparatus as set forth in claim 2 wherein said fourth member includes a gear rack cooperative with a pinion rack wherein said pinion rack is formed on a shaft coextensive to said fourth member and terminating in a side face of said first member for access to enable rotation of said pinion.
Claim 5
Dependent Claim
49 words
An adjustable wedge-shaped ramp apparatus as set forth in claim 3 wherein said second member is mechanically secured to said third member by a plurality of dovetails integrally formed to said third member and slidably secured within complementary dovetail recesses formed through a lower face of said second member.
Claim 6
Dependent Claim
41 words
An adjustable wedge-shaped ramp apparatus as set forth in claim 4 wherein said third member includes a plurality of coextensive recesses therethrough of triangular cross-sectional configuration for slidably receiving therein a like plurality of fifth, sixth, and seventh triangular wedge members.
Claim 7
Dependent Claim
36 words
An adjustable wedge-shaped ramp apparatus as set forth in claim 5 wherein said fifth member is positionable between said first member and said second member for pivotally elevating said first member relative to said second member.
Claim 8
Dependent Claim
36 words
An adjustable wedge-shaped ramp apparatus as set forth in claim 6 wherein said sixth member is slidably removable from within said third member and positionable adjacent a door sill associated with said vertically spaced upper level.
Claim 9
Dependent Claim
38 words
An adjustable wedge-shaped ramp apparatus as set forth in claim 7 wherein said seventh member is slidably removable from said third member and positionable adjacent said door sill on the opposite side thereof relative to said sixth member.
References Cited (Backward Citations)
US976666A
Cited
US1210133A
Cited
US1262930A
Cited
US1568303A
Cited
US2437479A
Cited
US3153798A
Cited
US3353789A
Cited
GB1353286A
Cited
US3994474A
Cited
US4329752A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |