US3966240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick-action pipe joint
Assignee: Nakamura Kinzoku Kogyosho Inc
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Filing: 1975-03-17
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Granted: 1976-06-29
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Expires: 1995-03-17
Abstract
Abstract Quick-action pipe joint having a pair of clamp members in which tapered groove portions are adapted to engage the peripheries of flanges of the pipes to be connected. The members are curved so as to be able to encircle the pipe flanges, one end of each clamp member being mounted so as to rotate or pivot freely, toward and away from each other. The other ends can be held tightly clamped with a special bolt and a nut arrangement.
Inventors
- 👤 Michitoshi Enomoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:48
CPC Classifications
F; F16; F16L; F16L23/00; F16L23/04; F16L23/08; F16L23/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
161 words
A quick-action pipe joint comprising: a pair of opposed curved clamp members in which interior, tapered grooved portions are formed, for simultaneous engagement with and clamping of at least flange portions of two pipes to be joined; said members having terminal portions with respective cut-outs therein, to engage a bolt having freedom of rotation at one end thereof; and recesses therein to mount a link with pins so as to rotate freely on a surface of the other end; and a nut including a body portion and a sleeve-shaped screw portion, for securing said clamp members at said one end in engagement with said bolt; wherein said clamp members and said nut body portion are mass produced by die-casting and molding from an aluminum alloy, said screw portion is made from an abrasion-resistant material such as steel, extends axially beyond the end of said body portion and is in abutting engagement with the terminal portion of one of said clamp members.
Claim 2
Dependent Claim
161 words
A quick-action pipe joint comprising: a pair of opposed curved clamp members in which interior, tapered grooved portions are formed, for simultaneous engagement with and clamping of at least flange portions of two pipes to be joined; said members having terminal portions with respective cut-outs therein, to engage a bolt having freedom of rotation at one end thereof; and recesses therein to mount a link with pins so as to rotate freely on a surface of the other end; and a nut including a body portion and a sleeve-shaped screw portion, for securing said clamp members at said one end in engagement with said bolt; wherein said clamp members and said nut body portion are mass produced by die-casting and molding from an aluminum alloy, said screw portion is made from an abrasion-resistant material such as steel, extends axially beyond the end of said body portion and is in abutting engagement with the terminal portion of one of said clamp members.
Claim 3
Dependent Claim
33 words
The pipe joint as defined in claim 1, wherein said nut screw portion has a collar, also from the abrasion-resistant material that covers from outside a terminal portion of said nut body portion.
Claim 4
Dependent Claim
23 words
The pipe joint as defined in claim 1, further comprising at least one packing placed into between said flange portions of the pipes.
References Cited (Backward Citations)
US1093868A
Cited
US2689141A
Cited
GB736879A
Cited
FR1150947A
Cited
FR1473759A
Cited
US3563571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |