US4030255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Folding handrail system for telescoping seating systems
Assignee: UNIVERSAL BLEACHER Co
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Filing: 1976-06-28
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Granted: 1977-06-21
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Expires: 1996-06-28
Abstract
Abstract A plurality of telescoping tubes form a rail assembly which is pivotally connected at its lower end to a post, a sleeve is slidably received in the uppermost tube which is provided with an upper stop ring and a lower ring to limit the motion of the sleeve. A link is pivotally connected between the sleeve and an upper post. Thus, as the seating system is extended for use or retracted for storage, the handrail also extends and retracts. A stop element on the link limits the position of the link in the extended position so that the axes of upper and lower rail assemblies are aligned. In a preferred embodiment, the posts are inclined forwardly so that the rail assemblies are vertical in the storage position.
Inventors
- 👤 Arlin Philip Hartman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:24
CPC Classifications
E; E04; E04H; E04H3/00; E04H3/10; E04H3/12; E04H3/123; E04F; E04F11/00; E04F11/18; E04F2011/1868; E04F2011/187
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
127 words
In combination with a telescoping seating system having a plurality of rows movable between an extended use position in which said rows are in stepped relation and a retracted position in which said rows are in superposed relation, a telescoping handrail comprising at least a pair of posts, one mounted to an upper row and the other to a lower row, a handrail comprising a plurality of telescoping tubular elements forming a rail assembly; means for pivotally mounting the lower end of said rail assembly to one of said posts; a sleeve slidably received on the uppermost tubular element of said rail assembly; and link means pivotally connected at one end to said sleeve and pivotally connected at the other end to the other of said posts.
Claim 2
Dependent Claim
127 words
In combination with a telescoping seating system having a plurality of rows movable between an extended use position in which said rows are in stepped relation and a retracted position in which said rows are in superposed relation, a telescoping handrail comprising at least a pair of posts, one mounted to an upper row and the other to a lower row, a handrail comprising a plurality of telescoping tubular elements forming a rail assembly; means for pivotally mounting the lower end of said rail assembly to one of said posts; a sleeve slidably received on the uppermost tubular element of said rail assembly; and link means pivotally connected at one end to said sleeve and pivotally connected at the other end to the other of said posts.
Claim 3
Dependent Claim
45 words
The apparatus of claim 1 wherein each uppermost tubular element of a rail assembly includes upper and lower limit means for engaging said sleeve respectively when said rail assembly is extended and retracted for limiting the motion of the upper portion of said rail assembly.
Claim 4
Dependent Claim
29 words
The system of claim 2 wherein said upper and lower limit means each comprise a peripheral ridge extending outwardly of an associated upper tubular element of a rail assembly.
Claim 5
Dependent Claim
60 words
The system of claim 1 further comprising stop means interposed between said link and its associated post when said rail assembly is in an extended position to limit the pivoting of said rail assembly whereby all tubes of a rail assembly are substantially axially aligned with the tubular elements of a corresponding rail assembly of a higher or lower section.
Claim 6
Dependent Claim
14 words
The apparatus of claim 4 wherein said stop means is secured to said link.
Claim 7
Dependent Claim
33 words
The apparatus of claim 5 further comprising means for adjusting said stop means on said link to thereby adjust the position of said link relative to an associated post in the lowered position.
Claim 8
Dependent Claim
24 words
The system of claim 1 wherein said posts are forwardly inclined, whereby said rail assemblies assume a generally upright position in the retracted position.
Claim 9
Dependent Claim
53 words
The apparatus of claim 1 wherein the means for mounting said rail assemblies to a post comprises: a pin extending through an associated post, said link being journaled on said pin; a knuckle in the lowermost tubular element and journaled on said pin, and a spacer element between said link and said knuckle.
References Cited (Backward Citations)
US699509A
Cited
US2933149A
Cited
US3401918A
Cited
US3667171A
Cited
US3871479A
Cited
US3995832A
Cited
US3964215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-20 | 1980-12-20 | 1981-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-20 | 1984-12-20 | 1985-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-20 | 1988-12-20 | 1989-06-21 | $7700.00 | Window Closed / Lapsed |