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US4347638A Expired / Lapsed US ⏱️ 0.0 years remaining

Retractable porch and stair apparatus for trailers

Assignee: Individual
•
Filing: 1980-03-10
•
Granted: 1982-09-07
•
Expires: 2000-03-10
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Abstract

Abstract A retractable porch and stair apparatus suitable for use with trailers and the like has a pair of parallel elongate channel members for attachment to the underside of a trailer. A floor member having preferably iron grating therein for strength and cleanliness is disposed on a pair of parallel runner members slidingly mounted on the channel members so that the floor member can be slidingly moved from the underside of the trailer to a position adjacent thereto. A stair combination having parallel side support members in the form of channel members is connected at one end to a corresponding pair of second channel members mounted on the underside of the floor member and extending to the side of the floor member so that the stair combination can be raised to horizontal position and slidingly moved underneath the floor member, and the floor member and stair members can then be slidingly moved under the trailer for storage.

Inventors

  • 👤 Murland L. Weaver

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-02 15:08
CPC Classifications
B; B60; B60R; B60R3/00; B60R3/02

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 111 words
A combination retractable porch and stair apparatus for trailers, comprising in combination; floor means mounted on a pair of elongate spaced-apart channel iron support members; a second pair of cooperating elongate, spaced-apart channel iron support members slidingly receiving said first pair of support members, said second pair of support members being adapted for attachment on the underside of a trailer; a third pair of spaced-apart, elongate channel iron support members mounted on the underside of said second pair of support members perpendicularly of said first pair of support members; and stair means having a pair of spaced-apart elongate stair side support members slidingly mounted on said third pair of support members.
Claim 2
Dependent Claim 111 words
A combination retractable porch and stair apparatus for trailers, comprising in combination; floor means mounted on a pair of elongate spaced-apart channel iron support members; a second pair of cooperating elongate, spaced-apart channel iron support members slidingly receiving said first pair of support members, said second pair of support members being adapted for attachment on the underside of a trailer; a third pair of spaced-apart, elongate channel iron support members mounted on the underside of said second pair of support members perpendicularly of said first pair of support members; and stair means having a pair of spaced-apart elongate stair side support members slidingly mounted on said third pair of support members.
Claim 3
Dependent Claim 52 words
An apparatus as set forth in claim 1, wherein said pair of stair side support members are slidingly mounted on said third pair of channel iron support members with a plurality of roller means mounted on said pair of side support members for engagement with said pair of channel iron support members.
Claim 4
Dependent Claim 26 words
An apparatus as set forth in claim 1, including securing means for securing said stair means in place in the downward position with said floor means.
Claim 5
Dependent Claim 24 words
An apparatus as set forth in claim 1, including locking means for securing said floor means in the extended position with respect to said
Claim 6
Dependent Claim 32 words
An apparatus as set forth in claim 4, wherein said locking means comprises a "C"-clamp for disposition around each respective pair of cooperating first and second pairs of channel iron support members.
Claim 7
Dependent Claim 23 words
An apparatus as set forth in claim 1, including removable railing means for security around said floor means and aong said stair means.

References Cited (Backward Citations)

US2457380A Cited
US2786710A Cited
US2929654A Cited
US3515406A Cited
US3693754A Cited
US3796456A Cited
US3808757A Cited
US3906690A Cited
US3912298A Cited
US4078678A Cited
US4139078A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1985-09-06 1986-03-08 1986-09-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1989-09-06 1990-03-08 1990-09-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1993-09-06 1994-03-08 1994-09-07 $7700.00 Window Closed / Lapsed

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