Patent US3580373A successfully refreshed from Google Patents.
US3580373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable ramp
Assignee: Doosan Bobcat North America Inc
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Filing: 1968-11-21
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Granted: 1971-05-25
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Expires: 1988-11-21
Abstract
Abstract A portable ramp having a plurality of elongated floor members with devices for detachably securing the floor members together in side-by-side relation to form a complete floor portion. A transverse member is detachably secured to the floor member at one end thereof and to a vehicle and another detachable transverse member is detachably secured to the floor portion at the other end thereof.
Inventors
- 👤 Stanley A Stickle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:17
CPC Classifications
B; B65; B65G; B65G69/00; B65G69/28; B65G69/30
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
122 words
A portable ramp comprising: a plurality of elongated floor members having sidewalls, said sidewalls having key-slot means for detachably securing the said floor members together in side-by-side relation to form a complete floor portion, a first transverse member having gravity means for detachably securing the said floor portion at one end thereof to the said first transverse member and for detachably connecting said transverse member to a vehicle, said first transverse member maintaining said key-slot means in a position to secure said floor members together when said floor portion is secured to said first transverse member, and a second transverse member having gravity means for detachably securing the said floor portion at the other end thereof to be said second transverse member.
Claim 2
Dependent Claim
122 words
A portable ramp comprising: a plurality of elongated floor members having sidewalls, said sidewalls having key-slot means for detachably securing the said floor members together in side-by-side relation to form a complete floor portion, a first transverse member having gravity means for detachably securing the said floor portion at one end thereof to the said first transverse member and for detachably connecting said transverse member to a vehicle, said first transverse member maintaining said key-slot means in a position to secure said floor members together when said floor portion is secured to said first transverse member, and a second transverse member having gravity means for detachably securing the said floor portion at the other end thereof to be said second transverse member.
Claim 3
Dependent Claim
53 words
A portable ramp as specified in claim 1 in which a cross brace is provided intermediate the ends of the said floor portion, said cross brace having means at each end thereof for securing it to the sides of the said floor portion, and at least one jack supporting the said cross brace.
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |