US3789493A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic actuated fusion unit for plastic pipe
Assignee: TDW DELAWARE Inc 8506 EAST 61ST TULSA OK 74101 A CORP OF
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Filing: 1972-02-07
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Granted: 1974-02-05
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Expires: 1992-02-07
Abstract
Abstract This invention describes an improved method of supporting and axially traversing a movable pipe clamping means in a fusion type plastic pipe joining apparatus. Two rods are provided, one on each side of the frame, on which are supported hydraulic cylinders. Pistons are mounted centrally on the rods and the cylinders are adapted to fit the pistons and also to seal along the rods which serve both as support and guide rods and as pistons rods. The movable pipe clamp is supported by the two cylinders and is adapted to slide axially supported on the two piston rods. The piston rods are drilled axially from each and so that hydraulic fluid can be inserted through the axial conduits into the cylinder spaces on each side of the pistons so that by applying pressurized liquid to one side or the other of the pistons the cylinders carrying the movable pipe clamp, and movable pipe section, can be traversed axially.
Inventors
- 👤 W Province
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:44
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/14; B25B27/16; B29; B29C; B29C65/00; B29C65/02; B29C65/78; B29C65/7802; B29C65/7841; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/114; B29C66/1142; B29C66/50; B29C66/51; B29C66/52; B29C66/522; B29C66/5221; B29C66/80; B29C66/82; B29C66/824; B29C66/8242; B29C66/84; B29C66/865; B29C66/8652; B29C65/18; B29C65/20; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/5367; Y10T29/53796; Y10T29/5383; Y10T29/53987
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
160 words
In a fusion joining apparatus for plastic pipe, including: a frame, a first pipe clamp fastened in fixed position on said frame; a second movable pipe clamp coaxial with said first clamp and mounted for axial motion along said frame, the improvement in mounting and control for said movable pipe clamp, comprising: a. at least one piston rod mounted on the frame parallel to the axis of said first pipe clamp; b. piston means on said piston rod, and cylinder means enclosing and sealing said piston and piston rod, said cylinder attached to and supporting said movable second pipe clamp; c. conduit means along the axis of, from each end of, said piston rod terminating in the cylinder spaced on each side of said piston; and d. means to apply pressurized liquid selectively to said conduit means; whereby said piston rod serves to conduct pressurized liquid to said cylinder, and to provide guide rail support for said movable pipe clamp.
Claim 2
Dependent Claim
160 words
In a fusion joining apparatus for plastic pipe, including: a frame, a first pipe clamp fastened in fixed position on said frame; a second movable pipe clamp coaxial with said first clamp and mounted for axial motion along said frame, the improvement in mounting and control for said movable pipe clamp, comprising: a. at least one piston rod mounted on the frame parallel to the axis of said first pipe clamp; b. piston means on said piston rod, and cylinder means enclosing and sealing said piston and piston rod, said cylinder attached to and supporting said movable second pipe clamp; c. conduit means along the axis of, from each end of, said piston rod terminating in the cylinder spaced on each side of said piston; and d. means to apply pressurized liquid selectively to said conduit means; whereby said piston rod serves to conduct pressurized liquid to said cylinder, and to provide guide rail support for said movable pipe clamp.
Claim 3
Dependent Claim
43 words
The pipe joining apparatus as in claim 1 including two spaced apart piston rods each mounted parallel to the axis of said first pipe clamp, one on each side of said axis, and including piston means and cylinder means on each piston rod.
Claim 4
Dependent Claim
50 words
The pipe joining apparatus as in claim 1 including pressure liquid delivery means and pressure liquid withdrawal means, and including valve means to simultaneously deliver said pressure liquid to one pair of ends of said rods and withdraw the pressure liquid from the other pair of ends of said rods.
References Cited (Backward Citations)
US409008A
Cited
US2404639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |