Patent US4789218A successfully refreshed from Google Patents.
Patent US4283152A successfully refreshed from Google Patents.
US4283152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand and guard rails
Assignee: Rover Co Ltd
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Filing: 1977-03-14
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Granted: 1981-08-11
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Expires: 1997-03-14
Abstract
Abstract A hand and guard rail system has a clamp member made up of two identical elements which have semi-circular sectional portions at right angles to one another. The elements co-operate in clamping so that each portion forms a tubular portion to locate a pair of tubular rail members at right angles to each other.
Inventors
- 👤 Sydney J. Smith
- 👤 Peter F. Chambers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:33
CPC Classifications
F; F16; F16B; F16B7/00; F16B7/04; F16B7/044; F16B7/048; F16B7/0486; B; B60; B60N; B60N3/00; B60N3/02; B60N3/026; F16B2/00; F16B2/02; F16B2/06; F16B2/065; Y; Y10; Y10T; Y10T403/00; Y10T403/34; Y10T403/341; Y10T403/345
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
181 words
An assembly for use in constructing a hand and/or guard rail characterized by: (a) a clamp member (1) comprising two identical elements, each element having two semi-circular sectioned portions (6,7) at right angles to one another and the two elements being detachably connected to each other by securing means (2) so that each of the two corresponding semi-circular portions cooperate to form two tubular portions at right angles to each other; and (b) a tubular rail member (4) having an external diameter substantially the same as the internal diameter of the tubular portions (6) of the clamp member (1) and adapted to fit in the tubular portion (6) to be clamped therein by the securing means, and further comprising a two-piece generally cylindrical adaptor (13) which is split axially to form two portions (13a, 13b) which are of substantially semi-circular cross-section, each portion having at least two internal webs (14, 15) of different diameter so that when the adaptor is fitted within the clamp member (1) it can grip the ends of two tubes of different diameters within the clamp member.
Claim 2
Dependent Claim
181 words
An assembly for use in constructing a hand and/or guard rail characterized by: (a) a clamp member (1) comprising two identical elements, each element having two semi-circular sectioned portions (6,7) at right angles to one another and the two elements being detachably connected to each other by securing means (2) so that each of the two corresponding semi-circular portions cooperate to form two tubular portions at right angles to each other; and (b) a tubular rail member (4) having an external diameter substantially the same as the internal diameter of the tubular portions (6) of the clamp member (1) and adapted to fit in the tubular portion (6) to be clamped therein by the securing means, and further comprising a two-piece generally cylindrical adaptor (13) which is split axially to form two portions (13a, 13b) which are of substantially semi-circular cross-section, each portion having at least two internal webs (14, 15) of different diameter so that when the adaptor is fitted within the clamp member (1) it can grip the ends of two tubes of different diameters within the clamp member.
Claim 3
Dependent Claim
161 words
An assembly for use in constructing a hand and/or guard rail characterized by: (a) a clamp member (1) comprising two identical elements, each element having two semi-circular sectioned portions (6,7) at right angles to one another and the two elements being detachably connected to each other by securing means (2) so that each of the two corresponding semi-circular portions cooperate to form two tubular portions at right angles to each other; and (b) a tubular rail member (4) having an external diameter substantially the same as the internal diameter of the tubular portions (6) of the clamp member (1) and adapted to fit in the tubular portion (6) to be clamped therein by the securing means, and wherein said tubular rail member comprises a composite structure made up of an outer resilient bush (27) with the external diameter substantially the same as the internal diameter of the tubular portion (6) of the clamp member (1) and an inner rigid tube (28).
Claim 4
Dependent Claim
161 words
An assembly for use in constructing a hand and/or guard rail characterized by: (a) a clamp member (1) comprising two identical elements, each element having two semi-circular sectioned portions (6,7) at right angles to one another and the two elements being detachably connected to each other by securing means (2) so that each of the two corresponding semi-circular portions cooperate to form two tubular portions at right angles to each other; and (b) a tubular rail member (4) having an external diameter substantially the same as the internal diameter of the tubular portions (6) of the clamp member (1) and adapted to fit in the tubular portion (6) to be clamped therein by the securing means, and wherein said tubular rail member comprises a composite structure made up of an outer resilient bush (27) with the external diameter substantially the same as the internal diameter of the tubular portion (6) of the clamp member (1) and an inner rigid tube (28).
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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) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |