US4993880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trench-box panel
Assignee: Mabey Hire Co Ltd
•
Filing: 1990-05-03
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Granted: 1991-02-19
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Expires: 2010-05-03
Abstract
Abstract A trench-box panel (200, 202) comprises an array of horizontal elongate "C-section" members (210) one on top of another and welded together at w continuously along their lengths. The members (210) are longitudinally staggered to leave spaces (234) between the ends of alternate members (210) at each side edge (200C, 202C) of the panel (200, 202). Robust vertical angle-members (236) and flat members (238) are welded to the ends of the horizontal members (210) to seal the ends of cavities (220) inside the horizontal members (210).
Inventors
- 👤 John Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:21
CPC Classifications
E; E02; E02D; E02D17/00; E02D17/06; E02D17/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
169 words
A trench-box panel comprising an array of horizontal members, arranged one on top of another and welded together in mutually adjoining pairs, at least one element of one member of each said pair of mutually adjoining members co-operating with at least one adjoining element of the other member of the pair to define a horizontally-extending cavity which is closed by said elements except at the ends of the cavity, adjacent ends of mutually adjoining members being in mutually staggered relationship to leave spaces between the ends of alternate horizontal members at each of two vertical edges of the panel, and vertical panel-strengthening members welded to said ends of the horizontal members, at both said vertical edges of the panel, by means of welds, so as to seal the ends of said horizontally-extending cavities, some of said welds being welds in said spaces between the horizontal members on the one hand and at least one said vertical member at each said vertical edge of the panel on the other hand.
Claim 2
Dependent Claim
169 words
A trench-box panel comprising an array of horizontal members, arranged one on top of another and welded together in mutually adjoining pairs, at least one element of one member of each said pair of mutually adjoining members co-operating with at least one adjoining element of the other member of the pair to define a horizontally-extending cavity which is closed by said elements except at the ends of the cavity, adjacent ends of mutually adjoining members being in mutually staggered relationship to leave spaces between the ends of alternate horizontal members at each of two vertical edges of the panel, and vertical panel-strengthening members welded to said ends of the horizontal members, at both said vertical edges of the panel, by means of welds, so as to seal the ends of said horizontally-extending cavities, some of said welds being welds in said spaces between the horizontal members on the one hand and at least one said vertical member at each said vertical edge of the panel on the other hand.
Claim 3
Dependent Claim
27 words
A panel as claimed in claim 1 wherein the horizontal members are of a uniform length and are longitudinally staggered to provide said spaces between the ends.
Claim 4
Dependent Claim
54 words
A panel as claimed in claim 1, wherein the vertical members at each said vertical edge of the panel comprise a vertical, two-element, angle member and a vertical flat member which extends from one edge of one said element of the angle member and which faces the other said element of the angle member.
Claim 5
Dependent Claim
24 words
A panel as claimed in claim 3 wherein said vertical angle member is said one member welded in said spaces to said horizontal members.
Claim 6
Dependent Claim
87 words
A panel as claimed in claim 1, each said horizontal member comprising a horizontal element, a pair of mutually facing vertical elements extending from inside and outside edges of the horizontal element, and a pair of flange elements extending inwardly towards each other from distal edges of the vertical elements, mutually adjacent flange elements and horizontal elements of mutually adjacent members being welded together, and a horizontal closed-section or box-section member welded to the flange elements of a top or bottom one of the first-mentioned horizontal members.
Claim 7
Dependent Claim
172 words
A panel as claimed in claim 1 wherein the horizontal members are of a uniform length and are longitudinally staggered to provide said spaces between the ends; wherein the vertical members at each said vertical edge of the panel comprise a vertical, two-element, angle member and a vertical flat member which extends from one edge of one said element of the angle member and which faces the other said element of the angle member; wherein said vertical angle member is said one member welded in said spaces to said horizontal members; and each said horizontal member comprising a horizontal element, a pair of mutually facing vertical elements extending from inside and outside edges of the horizontal element, and a pair of flange elements extending inwardly towards each other from distal edges of the vertical elements, mutually adjacent flange elements and horizontal elements of mutually adjacent members being welded together, and a horizontal closed-section or box-section member welded to the flange elements of a top or bottom one of the first-mentioned horizontal members.
References Cited (Backward Citations)
US2878904A
Cited
US2899028A
Cited
US3750409A
Cited
DE2422404A1
Cited
US3999393A
Cited
US4044564A
Cited
EP0023566A2
Cited
US4345857A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-18 | 1994-08-20 | 1995-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-18 | 1998-08-20 | 1999-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-18 | 2002-08-20 | 2003-02-19 | $7700.00 | Window Closed / Lapsed |