US3799288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotatable stair assembly adapted for attachment to a vehicle platform
Assignee: Individual
•
Filing: 1972-05-17
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Granted: 1974-03-26
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Expires: 1992-05-17
Abstract
Abstract A stair assembly attachable to a vehicle platform to provide one or more rotatably positionable stair members. The described stair assembly includes two stair members, four support arms, two brackets, hinge fasteners for hinge fastening the support arms to the brackets, and hinge fasteners for hinge fastening the stair members to the support arms.
Inventors
- 👤 L Manuel
- 👤 R Manuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:30
CPC Classifications
B; B60; B60R; B60R3/00; B60R3/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
249 words
In a rotatable stair assembly, the combination comprising; a first stair member, a second stair member, a first support arm, a second support arm, a third support arm, and a fourth support arm, a first mounting bracket, and a second mounting bracket; each support arm having a first arm portion and a second arm portion that is perpendicular to said first arm portion thereof, each support arm having a first end at the end of said first arm portion and further having a second end at the end of said second arm portion; a first coupling means for rotatably coupling said first end of said first support arm to said first bracket, a second coupling means for rotatably coupling said first end of said second support arm to said second bracket, a third coupling means for rotatably coupling said second end of said first support arm to said first stair member, and fourth coupling means for rotatably coupling said second end of said second support arm to said first stair member; a fifth coupling means for rotatably coupling said first end of said third support arm to said first bracket, a sixth coupling means for rotatably coupling said first end of said fourth support arm to said second bracket, a seventh coupling means for rotatably coupling said second end of said third support arm to said second stair member, and an eighth means for rotatably coupling said second end of said fourth support arm to said second stair member.
Claim 2
Dependent Claim
249 words
In a rotatable stair assembly, the combination comprising; a first stair member, a second stair member, a first support arm, a second support arm, a third support arm, and a fourth support arm, a first mounting bracket, and a second mounting bracket; each support arm having a first arm portion and a second arm portion that is perpendicular to said first arm portion thereof, each support arm having a first end at the end of said first arm portion and further having a second end at the end of said second arm portion; a first coupling means for rotatably coupling said first end of said first support arm to said first bracket, a second coupling means for rotatably coupling said first end of said second support arm to said second bracket, a third coupling means for rotatably coupling said second end of said first support arm to said first stair member, and fourth coupling means for rotatably coupling said second end of said second support arm to said first stair member; a fifth coupling means for rotatably coupling said first end of said third support arm to said first bracket, a sixth coupling means for rotatably coupling said first end of said fourth support arm to said second bracket, a seventh coupling means for rotatably coupling said second end of said third support arm to said second stair member, and an eighth means for rotatably coupling said second end of said fourth support arm to said second stair member.
Claim 3
Dependent Claim
154 words
The combination set forth in claim 1 wherein each stair member includes a first lateral portion and a second lateral portion situated at opposite lateral sides thereof, each stair member including a forward portion and a rearward portion, the second end of the first arm and the second end of the second arm being rotatably coupled to the rearward poRtion of the first stair member, the second end of the third arm and the second end of the fourth arm being rotatably coupled to the forward portion of the second stair member, the second arm portions of said first arm and said second arm being arranged to operatively support said first lateral portion and said second lateral portion of said first stair member, and the second arm portions of said third arm and said fourth arm being arranged to operatively support said first lateral portion and said second lateral portion of second stair member.
Claim 4
Dependent Claim
44 words
The combination set forth in claim 1 wherein said first coupling means and said fifth coupling means include a bolt and nut common to each and wherein said second coupling means and said sixth coupling means include a bolt and nut common to each.
Claim 5
Dependent Claim
50 words
The combination set forth in claim 1 wherein each bracket includes a base portion adapted for attachment to one side of a platform and further includes a leg portion oriented perpendicular to the base portion and adapted for rotatable coupling thereto of the first ends of the corresponding support arms.
Claim 6
Dependent Claim
17 words
The combination set forth in claim 1 further comprising bumps formed in each of said stair members.
Claim 7
Dependent Claim
88 words
The combination set forth in claim 1 wherein each bracket includes a stop formation, the stop formation of the first bracket being located thereon to operatively abut the first arm portion of the third arm, the stop formation of the second bracket being located thereon to operatively abut the first arm portion of the fourth arm, the stop formations operatively abutting the first arm portions of the third and fourth arms to thereby maintain the second arm portions of the third and fourth arms in a horizontal plane.
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |