Patent US2895860A successfully refreshed from Google Patents.
Patent US3668874A successfully refreshed from Google Patents.
US3668874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shoring apparatus
Assignee: Individual
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Filing: 1971-06-15
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Granted: 1972-06-13
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Expires: 1991-06-15
Abstract
Abstract Apparatus for shoring the walls of trenches or ditches including fluid motors carried by a framework and being adapted to cooperate with sheet members for forcing the sheet members into place to support the trench walls and for removing the sheet members after work has been completed.
Inventors
- 👤 Josef Krings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:00
CPC Classifications
E; E02; E02D; E02D17/00; E02D17/06; E02D17/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
94 words
Apparatus for shoring walls of a trench with sheeting elements, said apparatus including a frame having a pair of spaced frame members, extensible spacing means for holding said frame members in spaced apart relation, fluid motor means carried by said frame outwardly of said spaced frame members, said fluid motor means including a pair of spaced pistons disposed within spaced cylinders and connected together by a piston rod, valve means for connecting opposite ends of said cylinders to a source of fluid pressure, and means for connecting said piston rod to said sheeting elements.
Claim 2
Dependent Claim
94 words
Apparatus for shoring walls of a trench with sheeting elements, said apparatus including a frame having a pair of spaced frame members, extensible spacing means for holding said frame members in spaced apart relation, fluid motor means carried by said frame outwardly of said spaced frame members, said fluid motor means including a pair of spaced pistons disposed within spaced cylinders and connected together by a piston rod, valve means for connecting opposite ends of said cylinders to a source of fluid pressure, and means for connecting said piston rod to said sheeting elements.
Claim 3
Dependent Claim
22 words
Apparatus as defined in claim 1 including a cover plate, and means for adjustably connecting said cover plate to said frame members.
Claim 4
Dependent Claim
19 words
Apparatus as defined in claim 2 including lifting ring means fixed to said cover plate on its uppermost side.
Claim 5
Dependent Claim
21 words
Apparatus as defined in claim 1 including leg means extending downwardly from said spaced frame members below said fluid motor means.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |