Patent US3666026A successfully refreshed from Google Patents.
US3666026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for gripping and actuating a boring tube, foundation pile or the like
Assignee: Individual
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Filing: 1970-08-21
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Granted: 1972-05-30
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Expires: 1990-08-21
Abstract
Abstract A device for tightening and actuating a boring tube, and comprising a collar constituted by a first and a second chain links or sections interconnected through the medium of linking elements, the ends of said first link being secured directly to the said linking elements while the ends of said second link are adapted to be actuated respectively by traction means solid with the said linking elements, so as to ensure a uniform and accurate tightening of the collar on the tube by exerting a tractional action on both ends of said second chain link.
Inventors
- 👤 Pierre Jean-Marie Theod Allard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:58
CPC Classifications
E; E21; E21B; E21B3/00; E21B3/02; E21B3/025
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
128 words
A device for tightening and actuating a boring tube comprising a first and a second chain sections adapted to surround said tube, two U-shaped linking members fitting the contour of said tube and interconnecting said first and second chain sections, tightening hydraulic cylinders fitted within said linking members respectively, each of said cylinders including a body rotatably mounted inside said linking members and a rod to which respective ends of said second chain section are secured, whereas said linking members include securing means by which the respective ends of said first chain section are directly attached to said linking members so that when said cylinder rods exert a traction upon both ends of said second chain section, the first chain section is tightened by reaction against the tube.
Claim 2
Independent Claim
128 words
A device for tightening and actuating a boring tube comprising a first and a second chain sections adapted to surround said tube, two U-shaped linking members fitting the contour of said tube and interconnecting said first and second chain sections, tightening hydraulic cylinders fitted within said linking members respectively, each of said cylinders including a body rotatably mounted inside said linking members and a rod to which respective ends of said second chain section are secured, whereas said linking members include securing means by which the respective ends of said first chain section are directly attached to said linking members so that when said cylinder rods exert a traction upon both ends of said second chain section, the first chain section is tightened by reaction against the tube.
Claim 3
Dependent Claim
39 words
A device according to claim 1, wherein the body of said cylinders is provided with projecting studs and said linking members comprise two substantially parallel confronting walls each having bore holes so that said studs may freely rotate therein.
Claim 4
Dependent Claim
28 words
A device according to claim 1, wherein said cylinder rods are removably connected to the respective ends of said second chain section through the medium of a fork-piece.
Claim 5
Dependent Claim
29 words
A device according to claim 1, wherein said linking members include fixing means which are solid with rod means controlling the vertical and alternate rotary motion of said tube.
Claim 6
Dependent Claim
35 words
A device according to claim 1, wherein said securing means include one removable pin in order to increase or reduce the number of links of said chain sections depending on the diameter of said tube.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |