Patent US3886774A successfully refreshed from Google Patents.
US3886774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for shot peening of tubes
Assignee: Kraftwerk Union AG
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Filing: 1974-05-22
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Granted: 1975-06-03
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Expires: 1994-05-22
Abstract
Abstract In shot-peening the external surface of a tube that is partly straight and partly curved or bent, straight portions of the tube are peened by moving the tube in a straight path through a stationary peening device, while bent portions are peened by holding the tube stationary and moving the peening device about the bend in the tube.
Inventors
- 👤 Sven Sixten Stromstedt
- 👤 Sven Borje Bystrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:57
CPC Classifications
C; C21; C21D; C21D7/00; C21D7/02; C21D7/04; C21D7/06; B; B24; B24C; B24C1/00; B24C1/10; B24C3/00; B24C3/32
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
93 words
Method of shot peening the external surface of a tube that is partly straight and partly curved, using an assembly of shot peening nozzles arranged concentrically around and directed towards the tube, according to which for shot peening a straight portion of the tube the nozzle assembly is held stationary and the tube is moved in a straight path with said straight portion passing through the nozzle assembly, while for shot peening a curved portion of the tube the tube is held stationary and the nozzle assembly is moved about the curved portion.
Claim 2
Dependent Claim
93 words
Method of shot peening the external surface of a tube that is partly straight and partly curved, using an assembly of shot peening nozzles arranged concentrically around and directed towards the tube, according to which for shot peening a straight portion of the tube the nozzle assembly is held stationary and the tube is moved in a straight path with said straight portion passing through the nozzle assembly, while for shot peening a curved portion of the tube the tube is held stationary and the nozzle assembly is moved about the curved portion.
Claim 3
Dependent Claim
93 words
Method of shot peening the external surface of a tube that is partly straight and partly curved, using an assembly of shot peening nozzles arranged concentrically around and directed towards the tube, according to which for shot peening a straight portion of the tube the nozzle assembly is held stationary and the tube is moved in a straight path with said straight portion passing through the nozzle assembly, while for shot peening a curved portion of the tube the tube is held stationary and the nozzle assembly is moved about the curved portion.
Claim 4
Dependent Claim
93 words
Method of shot peening the external surface of a tube that is partly straight and partly curved, using an assembly of shot peening nozzles arranged concentrically around and directed towards the tube, according to which for shot peening a straight portion of the tube the nozzle assembly is held stationary and the tube is moved in a straight path with said straight portion passing through the nozzle assembly, while for shot peening a curved portion of the tube the tube is held stationary and the nozzle assembly is moved about the curved portion.
Claim 5
Dependent Claim
73 words
Device for shot peening the external surface of a partly straight and partly curved tube, said device comprising a nozzle assembly having a number of shot peening nozzles that are concentric with the tube and directed towards the tube, means for moving the tube in a straight path thereby passing a straight part of the tube through the nozzle assembly, and means for moving the nozzle assembly about a bend of the tube.
Claim 6
Dependent Claim
73 words
Device for shot peening the external surface of a partly straight and partly curved tube, said device comprising a nozzle assembly having a number of shot peening nozzles that are concentric with the tube and directed towards the tube, means for moving the tube in a straight path thereby passing a straight part of the tube through the nozzle assembly, and means for moving the nozzle assembly about a bend of the tube.
Claim 7
Dependent Claim
24 words
Device as defined in claim 2, wherein the means for moving the nozzle assembly includes means for setting of different radii for the movement.
Claim 8
Dependent Claim
28 words
Device as defined in claim 2, wherein the means for moving the tube in a straight path comprises a tube holder that is moved in a straight path.
Claim 9
Dependent Claim
23 words
Device as defined in claim 4, in which the holder for moving the tube in a straight path is placed above the tube.
Claim 10
Dependent Claim
33 words
Device as defined in claim 2, wherein adjacent shot peening nozzles are set at slightly different angles in relation to the axis of the tube in order for less interference between the jets.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |