US3705511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low penetration ball forming process
Assignee: Avco Corp
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Filing: 1969-10-17
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Granted: 1972-12-12
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Expires: 1989-10-17
Abstract
Abstract A controlled metal deformation process for shaping, forming or contouring metal sheet, plate, and wrought shapes such as extrusions comprising flowing a quantity of metal balls (generally greater in size and mass by several orders of magnitude than standard shot consisting of an aggregate of sizes used in conventional shot peening processes) over the surface to be deformed. The novel process includes impacting the surfaces with metal balls at relatively low velocities, such as by using the force of gravity and resulting in low penetration of ball into metal surface, while the part being formed is in a prestressed condition and moving through the metal ball delivery stream.
Inventors
- 👤 Wynand W Brandel
- 👤 Lawrence S Klass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:58
CPC Classifications
B; B21; B21D; B21D31/00; B21D31/06; C; C21; C21D; C21D7/00; C21D7/02; C21D7/04; C21D7/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
114 words
A controlled metal deformation process for shaping, forming or contouring metal parts such as metal sheet, plate and shapes comprising allowing metal balls to freely fall be gravity upon a selected area of the surface of said metal parts while relatively moving said metal parts linearly across the region of impact, said balls being composed of metal of greater hardness than the metal to be formed, and being of uniform size within a range of sizes several orders of magnitude greater than shot sizes listed in the standard size specification of SAE J444, and simultaneously maintaining the surface of said parts under tension by establishing a convex curvature thereof at the region of impact.
Claim 2
Dependent Claim
114 words
A controlled metal deformation process for shaping, forming or contouring metal parts such as metal sheet, plate and shapes comprising allowing metal balls to freely fall be gravity upon a selected area of the surface of said metal parts while relatively moving said metal parts linearly across the region of impact, said balls being composed of metal of greater hardness than the metal to be formed, and being of uniform size within a range of sizes several orders of magnitude greater than shot sizes listed in the standard size specification of SAE J444, and simultaneously maintaining the surface of said parts under tension by establishing a convex curvature thereof at the region of impact.
Claim 3
Dependent Claim
17 words
The process as defined in claim 1 wherein said balls are at least one-eighth inch in diameter.
Claim 4
Dependent Claim
95 words
A controlled metal deformation process for shaping, forming or contouring metal parts such as metal sheet, plate and shapes comprising dropping metal balls and permitting said balls to freely fall by gravity upon a selected area of the surface of said metal parts while relatively moving said metal parts across the region of impact, said balls being composed of metal of greater hardness than the metal to be formed, and being of uniform size, and simultaneously maintaining the surface of said parts under tension by establishing a convex curvature thereof at the region of impact.
Claim 5
Dependent Claim
95 words
A controlled metal deformation process for shaping, forming or contouring metal parts such as metal sheet, plate and shapes comprising dropping metal balls and permitting said balls to freely fall by gravity upon a selected area of the surface of said metal parts while relatively moving said metal parts across the region of impact, said balls being composed of metal of greater hardness than the metal to be formed, and being of uniform size, and simultaneously maintaining the surface of said parts under tension by establishing a convex curvature thereof at the region of impact.
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) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |