US4043167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and machine for finishing a 15° to 180° pipe bend which has been preformed on a pipe bending press
Assignee: Sidro KG Ludwig Moeller Fabrik fuer Rohrbogen
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Filing: 1976-08-13
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Granted: 1977-08-23
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Expires: 1996-08-13
Abstract
Abstract A process for finishing a 15° to 180° pipe bend which has been preformed on a pipe bending press comprises submitting a preformed pipe bend at a temperature of 700° to 900° C. at which it leaves a pipe bending press to a hot sizing operation which includes trimming both ends of the pipe bend to precise dimensions to eliminate further finishing.
Inventors
- 👤 Rolf Koser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:11
CPC Classifications
B; B23; B23D; B23D45/00; B23D45/10; B23D45/102; B21; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/28; B21C37/30; B23D45/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/49446; Y10T83/00; Y10T83/768; Y10T83/7684; Y10T83/7693; Y10T83/7701
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
69 words
A process for finishing a 15° to 180° pipe bend which has been preformed on pipe press, comprising a. sizing said preformed pipe bend between coacting dies while said pipe bend is at a temperature of 700°-900° C and b. simultaneously trimming both ends of said pipe bend to precise dimensions while said pipe bend is retained between said dies whereby further finishing of said pipe bend is eliminated.
Claim 2
Dependent Claim
69 words
A process for finishing a 15° to 180° pipe bend which has been preformed on pipe press, comprising a. sizing said preformed pipe bend between coacting dies while said pipe bend is at a temperature of 700°-900° C and b. simultaneously trimming both ends of said pipe bend to precise dimensions while said pipe bend is retained between said dies whereby further finishing of said pipe bend is eliminated.
Claim 3
Dependent Claim
176 words
A machine for finishing a 15° to 180° pipe bend which has been preformed on a pipe bending press, comprising a. a frame member; b. a pair of open coacting dies for sizing preformed hot 15° to 180° pipe bends positioned therebetween, the length of said dies being less than the length of the pipe bends whereby the opposite ends of the pipe bends project from between said dies; c. means stationarily mounting one of said dies on said frame member; d. means, mounted on said frame member, for moving the other of said dies toward said stationary die to size a pipe bend and away from stationary die to release said pipe bend after sizing; e. a pair of trimming devices located at opposite sides, respectively, of said stationary die; and f. means, positioned on said frame member, mounting each of said trimming devices for movement along a path transverse to the axis of said pipe bend to trim opposite projecting ends of said pipe bend while said pipe bend is retained between said dies.
Claim 4
Dependent Claim
176 words
A machine for finishing a 15° to 180° pipe bend which has been preformed on a pipe bending press, comprising a. a frame member; b. a pair of open coacting dies for sizing preformed hot 15° to 180° pipe bends positioned therebetween, the length of said dies being less than the length of the pipe bends whereby the opposite ends of the pipe bends project from between said dies; c. means stationarily mounting one of said dies on said frame member; d. means, mounted on said frame member, for moving the other of said dies toward said stationary die to size a pipe bend and away from stationary die to release said pipe bend after sizing; e. a pair of trimming devices located at opposite sides, respectively, of said stationary die; and f. means, positioned on said frame member, mounting each of said trimming devices for movement along a path transverse to the axis of said pipe bend to trim opposite projecting ends of said pipe bend while said pipe bend is retained between said dies.
Claim 5
Dependent Claim
24 words
A machine as defined in claim 2 wherein said means mounting each of said trimming devices for movement along a path comprises a slide.
Claim 6
Dependent Claim
24 words
A machine as defined in claim 2 wherein said means mounting each of said trimming devices for movement along a path comprises a support.
Claim 7
Dependent Claim
25 words
A machine as defined in claim 2 wherein said means mounting each of said trimming devices for movement along a path comprises a swivel arm.
Claim 8
Dependent Claim
18 words
A machine as defined in claim 2 wherein said means for moving said other die comprises hydraulic means.
Claim 9
Dependent Claim
45 words
A machine as defined in claim 2 wherein each trimming device comprises an electric motor, which on its shaft carries a grinding disc and a pivotally mounted supporting arm for adjusting the angle of said grinding disc relative to the axis of said pipe bend.
Claim 10
Dependent Claim
45 words
A machine as defined in claim 2 wherein each trimming device comprises an electric motor, which on its shaft carries a saw blade, and a pivotally mounted supporting arm for adjusting the angle of said saw blade relative to the axis of said pipe bend.
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) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |