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Patent US3583676A successfully refreshed from Google Patents.
US3583676A
Expired / Lapsed
US
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Barricade
Assignee: Sekisui Adohfya Kogyo KK
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Filing: 1969-04-18
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Granted: 1971-06-08
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Expires: 1989-04-18
Abstract
Abstract A demountable barricade comprising an elongated crosspiece having openings adapted to receive a supporting leg assembly which includes a connecting portion adapted for insertion in said openings and at least two channels straddling said connecting portion and adapted to receive supporting legs for the barricade.
Inventors
- 👤 Kiyoshi Yamakawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:34
CPC Classifications
E; E01; E01F; E01F13/00; E01F13/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
147 words
A free-standing, demountable barricade comprising an elongated crosspiece member and at least two support means therefor; said crosspiece member having spaced openings at opposite ends thereof; said support means having a connecting portion adapted for insertion in the openings in said crosspiece member and also having at least two channels bracketing said connecting portion for supporting legs for said barricade; at least two pairs of elongated supporting legs, specularly opposite with respect to a plane of symmetry passing through said crosspiece member, the upper portion of which are removably confined in the channels of said support means; and spreading means for yieldably urging apart the lower portions of said supporting legs and thereby firmly fixing the upper portions of said supporting legs to said support means through a compression generated, in the channels of said support means, by a rotational coupling force caused by said spreading means.
Claim 2
Dependent Claim
147 words
A free-standing, demountable barricade comprising an elongated crosspiece member and at least two support means therefor; said crosspiece member having spaced openings at opposite ends thereof; said support means having a connecting portion adapted for insertion in the openings in said crosspiece member and also having at least two channels bracketing said connecting portion for supporting legs for said barricade; at least two pairs of elongated supporting legs, specularly opposite with respect to a plane of symmetry passing through said crosspiece member, the upper portion of which are removably confined in the channels of said support means; and spreading means for yieldably urging apart the lower portions of said supporting legs and thereby firmly fixing the upper portions of said supporting legs to said support means through a compression generated, in the channels of said support means, by a rotational coupling force caused by said spreading means.
Claim 3
Dependent Claim
43 words
The barricade of claim 1 wherein the spreading means comprises an elongated connecting rod which is flexed and resilient and is connected to said leg members by connectors which are removably affixed to said leg members and to said flexed, resilient, connecting rod.
Claim 4
Dependent Claim
15 words
The barricade of claim 2 wherein said support means is made from a flexible plastic.
Claim 5
Dependent Claim
47 words
The barricade of claim 3 wherein said supporting legs are made of hollow construction in which flowable ballast material is enclosed, so that when the barricade is assembled, the flowable ballast material falls to the lower portion of said legs and improves the stability of the barricade.
Claim 6
Dependent Claim
78 words
The barricade of claim 4 wherein the width of said opening of said elongated crosspiece member is substantially equal to the thickness of the connecting portion of said support means; wherein the thickness of said opening of said elongated crosspiece member is substantially equal to the width of said connecting portion; and wherein the outer dimension of the channel of said support means is substantially equal to an outer dimension of the upper end of said supporting legs.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |