US3811652A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Systems of anchorage to the traction jack of reinforcements to be post-tensioned
Assignee: VALENZUELA R DE
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Filing: 1972-05-04
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Granted: 1974-05-21
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Expires: 1992-05-04
Abstract
Abstract The present invention relates to an improvement in an anchoring device for post-tensioning reinforcement elements by a cooperating traction jack, and a conical wedge and mating interior conical ring of the traction jack. In accordance with the invention, a truncated conical wedge is solidly united to the head of a hydraulic piston, the cylinder of which has fixed to its front end an interior conical ring acting in conjunction with the wedge in order to fix the terminal ends of the rods or cables. The ends of the rods or cables enter into the anterior chamber of the body of the cylinder part of the body of the cylinder has an external screw-thread to which there is directly coupled the front extremity of the body of the traction jack.
Inventors
- 👤 Valenzuela R De
- 👤 R Villaverde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:53
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/12; E04G21/121
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
175 words
In an anchorage device for post-tensioning reinforcement elements, including a traction jack cooperating with a truncated hollow conical wedge, the wedge having distortion grooves running longitudinally of the axis of the wedge and along the inner surface of the hollow wedge, the wedge also having a longitudinal exterior channel opposite each distortion groove, the improvement wherein said traction jack comprises a detachable nose member threadably coupled at one end to the output connection of the traction jack, the nose membeR housing said wedge and comprising: a hydraulic piston member having a piston head solidly affixed to the base of said wedge; a cylinder for said piston; an interior conical ring at the end of said nose member opposite the threaded end, said interior conical ring having longitudinal internal channels complementary to and disposed opposite the exterior channels of said wedge, each pair of opposed channels adapted to accept a reinforcing element the ends of which are caused to enter into an internal chamber formed between the body of the nose member and the piston head.
Claim 2
Dependent Claim
175 words
In an anchorage device for post-tensioning reinforcement elements, including a traction jack cooperating with a truncated hollow conical wedge, the wedge having distortion grooves running longitudinally of the axis of the wedge and along the inner surface of the hollow wedge, the wedge also having a longitudinal exterior channel opposite each distortion groove, the improvement wherein said traction jack comprises a detachable nose member threadably coupled at one end to the output connection of the traction jack, the nose membeR housing said wedge and comprising: a hydraulic piston member having a piston head solidly affixed to the base of said wedge; a cylinder for said piston; an interior conical ring at the end of said nose member opposite the threaded end, said interior conical ring having longitudinal internal channels complementary to and disposed opposite the exterior channels of said wedge, each pair of opposed channels adapted to accept a reinforcing element the ends of which are caused to enter into an internal chamber formed between the body of the nose member and the piston head.
Claim 3
Dependent Claim
32 words
The improvement as claimed in claim 1, wherein said piston member includes a main piston portion slidable within said cylinder, said piston head being of smaller diameter than said main piston portion.
Claim 4
Dependent Claim
99 words
The improvement as claimed in claim 2, wherein said cylinder communicates with a posterior inlet disposed at the threaded end of said nose member and an anterior inlet disposed anteriorly of said main piston portion, such that fluid under pressure may be forced into either inlet to cause, when the fluid is forced into said posterior inlet, the piston and wedge to be thrust forwardly clamping said reinforcing elements in said channels, and to cause, when the fluid is forced into said anterior inlet, the piston and wedge to be thrust rearwardly releasing said reinforcing elements from the channels.
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |