Patent US3554492A successfully refreshed from Google Patents.
US3554492A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for drawing an anchor head on a rod or a tight cable
Assignee: Societe des Grands Travaux de Marseille SA
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Filing: 1968-11-14
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Granted: 1971-01-12
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Expires: 1988-11-14
Abstract
Abstract An apparatus for drawing an anchor head on a rod or a tight cable, which comprises a single hydraulic piston-cylinder unit of which the cylinder receives the cable therethrough and engages with one end the base plate, and of which the piston rigid with a hollow piston rod having a die secured therein is slidably mounted in a working chamber adapted to be connected to a source of fluid under pressure. An annular distance-piece slidably mounted in said working chamber is adapted to be either interposed between said piston rod and a pair of transverse keys adapted to slide in longitudinal slots formed in said cylinder and disposed between said annular distance-piece and said cable clamping device when said cable is being tensioned, or positioned to bear against the cylinder bottom. A hollow central punch fitted in the bore of said hollow piston rod receives said cable therethrough and engages with one end the socket to be drawn and with the opposite end said pair of transverse keys.
Inventors
- 👤 Rene Beghi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:37
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/12; E04G21/121
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
233 words
An apparatus for drawing an anchor head on a rod or tight cable from a drawing socket receiving said cable therethrough, which comprises a base plate through which said socket bears against the structure in which said cable is embedded, a cable clamping device mounted on the cable end, a single hydraulic piston and cylinder unit comprising an elongated cylinder, a cylinder bottom, a working chamber formed within said cylinder, a working piston slidably mounted in said working chamber and a hollow piston rod rigid with said working piston, said cylinder receiving said cable therethrough and contacting said base plate with one end, a die secured within said hollow piston rod, an annular distance-piece slidably mounted in the working chamber of said cylinder, longitudinal slots formed through said cylinder, a pair of transverse keys adapted to slide in said slots, said annular distance-piece being interposed, during the tensioning of said cable, between said hollow piston rod and said pair of transverse keys, said transverse keys also bearing against said cable clamping device, said annular distance-piece bearing on the other hand against said cylinder bottom, between said bottom and said transverse keys, when drawing the anchor head, and a hollow central punch engaged within said hollow piston rod and receiving said cable therethrough, said hollow central punch contacting with one end said socket to be drawn and with its opposite end said transverse keys.
Claim 2
Independent Claim
233 words
An apparatus for drawing an anchor head on a rod or tight cable from a drawing socket receiving said cable therethrough, which comprises a base plate through which said socket bears against the structure in which said cable is embedded, a cable clamping device mounted on the cable end, a single hydraulic piston and cylinder unit comprising an elongated cylinder, a cylinder bottom, a working chamber formed within said cylinder, a working piston slidably mounted in said working chamber and a hollow piston rod rigid with said working piston, said cylinder receiving said cable therethrough and contacting said base plate with one end, a die secured within said hollow piston rod, an annular distance-piece slidably mounted in the working chamber of said cylinder, longitudinal slots formed through said cylinder, a pair of transverse keys adapted to slide in said slots, said annular distance-piece being interposed, during the tensioning of said cable, between said hollow piston rod and said pair of transverse keys, said transverse keys also bearing against said cable clamping device, said annular distance-piece bearing on the other hand against said cylinder bottom, between said bottom and said transverse keys, when drawing the anchor head, and a hollow central punch engaged within said hollow piston rod and receiving said cable therethrough, said hollow central punch contacting with one end said socket to be drawn and with its opposite end said transverse keys.
Claim 3
Dependent Claim
49 words
An apparatus as set forth in claim 1, wherein said cable clamping device comprises an externally screw-threaded portion, said apparatus further comprising a nut adapted to engage said screw-threaded portion when said cable is tensioned, in order to hold the cable under tension by reacting against thE cylinder end.
Claim 4
Dependent Claim
36 words
An apparatus as set forth in claim 1, wherein said cylinder comprises another chamber isolated from said working chamber, and a return piston slidably mounted in said other chamber and rigid with said hollow piston rod.
Claim 5
Dependent Claim
26 words
An apparatus as set forth in claim 1 wherein said transverse keys extend completely through said cylinder and their ends project from the outer surface thereof.
Claim 6
Dependent Claim
39 words
An apparatus as set forth in claim 1, which further comprises, in the said cylinder bottom, a nut screwed in said cylinder and provided with a central bore of a diameter greater than that of said cable clamping device.
Claim 7
Dependent Claim
83 words
An apparatus as set forth in claim 5, wherein said nut screwed in said cylinder bottom has a cylindrical skirtlike extension forming in conjunction with the bore of said cylinder an annular chamber filled with fluid under pressure, an annular bearing piston slidably mounted in said annular chamber, a stop-forming ring secured to said cylindrical skirt and limiting the axial stroke of said annular bearing piston, said annular piston providing a bearing surface for said distance-piece during the drawing of said anchor head.
Claim 8
Dependent Claim
25 words
An apparatus as set forth in claim 6, wherein said annular surface area of the working piston is smaller than that of said bearing piston.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |