US3701550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupling device for pipes with circular cross sections
Assignee: Saab Bofors AB
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Filing: 1971-03-08
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Granted: 1972-10-31
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Expires: 1991-03-08
Abstract
Abstract Two pipes having at their ends to be coupled internal threads of the opposite hand are coupled by a coupling ring which has corresponding external threads. Rotating of the coupling ring is effected by means of an intermediate member encompassing the ring axially displaceable thereon. A locking device in the form of movable guide rings is interposed between the coupling ring and the intermediate member. These guide rings have protrusions which are engageable with corresponding recesses at the ends of the pipes. In the event the threads on the coupling ring are initially engaged with the threads on one pipe end only, rotation of the intermediate member causes axial displacement thereof with respect to its position relative to the threads on the coupling ring thereby causing engagement of the threads on the coupling ring with the threads of the second pipe also. Upon completion of the threading operation the guide rings are in pressure engagement with the intermediate member so that the latter is locked in its position relative to the pipes thereby absorbing torsional forces as may occur between the coupling ring and the intermediate member.
Inventors
- 👤 Gunnar Jacobson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:43
CPC Classifications
F; F16; F16L; F16L15/00; F16L15/08; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/926; Y10T; Y10T403/00; Y10T403/29; Y10T403/299
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
272 words
A coupling device for pipes, said pipe coupling device comprising in combination: two pipes disposed in alignment with their facing ends spaced apart and having at their ends internal threads of the opposite hand, each of said pipe ends having in its rim at least one recess; a tubular connecting member axially displaceably and rotatably fitted into the pipes between their ends thereof and having at its ends external threads engageable with the pipe end threads; a tubular intermediate member rotatably and axially displaceably fitted upon said connecting member intermediate the ends thereof and also intermediate the pipe ends; at least one guide ring rotatably and axially displaceably fitted between the connecting member and the intermediate member and rotatable relative to said members, said guide ring having at each peripheral edge an outwardly directed protrustion extending between the peripheral rim of the respective end of the intermediate member and the adjacent pipe end, each of said protrusions being engageable with the recess in respective pipe rim upon rotation of the guide ring into an angular position in which each of said protrusions and said recesses are in axial registry; and releasable locking means joining said members and said guide ring for joint rotation relative to the pipes, whereby, rotation of said members and said guide ring, with the locking means released, causes screwing of the connecting member threads upon the pipe end threads thus pulling the pipes toward each other and engagement of the guide ring protrusions with the pipe rim recesses, and subsequently locking of the locking means locks the members and the guide ring in said threading and engagement positions.
Claim 2
Dependent Claim
272 words
A coupling device for pipes, said pipe coupling device comprising in combination: two pipes disposed in alignment with their facing ends spaced apart and having at their ends internal threads of the opposite hand, each of said pipe ends having in its rim at least one recess; a tubular connecting member axially displaceably and rotatably fitted into the pipes between their ends thereof and having at its ends external threads engageable with the pipe end threads; a tubular intermediate member rotatably and axially displaceably fitted upon said connecting member intermediate the ends thereof and also intermediate the pipe ends; at least one guide ring rotatably and axially displaceably fitted between the connecting member and the intermediate member and rotatable relative to said members, said guide ring having at each peripheral edge an outwardly directed protrustion extending between the peripheral rim of the respective end of the intermediate member and the adjacent pipe end, each of said protrusions being engageable with the recess in respective pipe rim upon rotation of the guide ring into an angular position in which each of said protrusions and said recesses are in axial registry; and releasable locking means joining said members and said guide ring for joint rotation relative to the pipes, whereby, rotation of said members and said guide ring, with the locking means released, causes screwing of the connecting member threads upon the pipe end threads thus pulling the pipes toward each other and engagement of the guide ring protrusions with the pipe rim recesses, and subsequently locking of the locking means locks the members and the guide ring in said threading and engagement positions.
Claim 3
Dependent Claim
61 words
The coupling device according to claim 1 wherein said locking means comprise first guide means including at least one axially elongate slot in the peripheral wall of one of said members and a guide element extending through said slot into the other member to allow axial displacement of said members with reference to each other within the limits of said slot.
Claim 4
Dependent Claim
25 words
The coupling device according to claim 2 wherein said guide element comprises a screw screwed through said slot in one member into the other member.
Claim 5
Dependent Claim
97 words
The coupling device according to claim 1 wherein said locking means comprises a second guide means, said second guide means including a guide element extending through openings in said intermediate member, said guide ring and said connecting member, the openings in said members and the guide ring having a width providing for lateral displacement of said members and said guide ring relative to said guide element, clamping means on the guide element for engaging the intermediate member with a clamping grip and clamping said members and said ring against each other upon locking of said locking means.
Claim 6
Dependent Claim
64 words
The coupling device according to claim 4 wherein said clamping means comprise a headed screw extending through said members and said ring from the side of the intermediate member and a lock nut secured upon a portion of the screw protruding from the connecting member, the head of said screw having flanks engaging complementary surfaces on the intermediate member upon tightening of said screw.
Claim 7
Dependent Claim
35 words
The coupling device according to claim 1 wherein said intermediate member includes in a wall portion accessible from the outside Of the device a recess for inserting thereunto a tool for rotating the intermediate member.
Claim 8
Dependent Claim
48 words
The coupling device according to claim 1 wherein said protrusion on the guide ring is movable into pressure engagement with the adjacent peripheral rim of the intermediate member upon rotating said members and said guide ring for securing the connecting member upon the threads of the pipe ends.
Claim 9
Dependent Claim
27 words
The coupling device according to claim 1 wherein said recesses in the pipe end rims extend through the entire thickness of the pipe walls of said rims.
Claim 10
Dependent Claim
28 words
The coupling device according to claim 1 wherein said recesses in the pipe end rims extends through part of the thickness of the pipe material of said rims.
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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |