US4002322A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interlocking handrail construction for balustrades
Assignee: YKK Corp
•
Filing: 1975-09-24
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Granted: 1977-01-11
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Expires: 1995-09-24
Abstract
Abstract An interlocking construction for balustrades mounted on a parapet or like foundation. The construction includes a bracket mounted on a foundation and having at its top end an arm terminating in a first locking prong and a securing member connected at its one end to the bracket and having at the other end a second locking prong. A handrail is provided with a pair of spaced-apart locking means such as grooves or prongs each extending along the handrail. The first and second locking prongs engage the locking means to grip the handrail in place on the bracket arm and the bracket-mounted securing member.
Inventors
- 👤 Isamu Matsubara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:27
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/18; E04F11/1802; E04F11/1804
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
145 words
An interlocking construction for balustrades to be secured to a foundation, which comprises: a. a bracket having means at one end adapted to be mounted on the foundation, said bracket having an arm at its other end, said arm terminating in a first locking prong; b. a securing member connected at one end to said bracket and having its other end formed into a second locking prong; c. A handrail having a pair of peripherally spaced-apart locking means each extending along the length of the handrail, said first and second locking prongs engaging said locking means to grip said handrail in place on said arm and said securing member; and d. said arm and said securing member jointly providing a continuous surface conforming to the portion of the peripheral surface of said handrail lying between said pair of locking means, and supporting said handrail thereon.
Claim 2
Dependent Claim
145 words
An interlocking construction for balustrades to be secured to a foundation, which comprises: a. a bracket having means at one end adapted to be mounted on the foundation, said bracket having an arm at its other end, said arm terminating in a first locking prong; b. a securing member connected at one end to said bracket and having its other end formed into a second locking prong; c. A handrail having a pair of peripherally spaced-apart locking means each extending along the length of the handrail, said first and second locking prongs engaging said locking means to grip said handrail in place on said arm and said securing member; and d. said arm and said securing member jointly providing a continuous surface conforming to the portion of the peripheral surface of said handrail lying between said pair of locking means, and supporting said handrail thereon.
Claim 3
Dependent Claim
11 words
A device according to claim 1, said continuous surface being concave.
Claim 4
Dependent Claim
27 words
A device according to claim 1, said bracket and said securing member jointly having a Y-shaped cross section, one arm of the Y-shape being said securing member.
Claim 5
Dependent Claim
23 words
A device according to claim 1, said first locking prong being integral with said bracket and hence fixed with respect to the foundation.
Claim 6
Dependent Claim
32 words
A device according to claim 1, said one end of said securing member being inset into said bracket such that the external surfaces of said securing member and said bracket are continuous.
Claim 7
Dependent Claim
27 words
An interlocking construction as defined in claim 1, wherein said locking means are located only at the position at which said bracket is mounted on said foundation.
Claim 8
Dependent Claim
16 words
An interlocking construction as defined in claim 1, wherein said locking means are radially projecting prongs.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |