US3857750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shot peening
Assignee: 3M Co
•
Filing: 1973-06-04
•
Granted: 1974-12-31
•
Expires: 1993-06-04
Abstract
Abstract A rotary wheel, in which spheroidal peening particles are affixed to radially extending circumferentially spaced flaps of fibrous sheet material, is used to impart compressive stress to, or aid in shaping, metallic substrates.
Inventors
- 👤 P Winter
- 👤 G Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:51
CPC Classifications
B; B24; B24B; B24B39/00; B24B39/006; B32; B32B; B32B7/00; B32B7/04; B32B7/12; B24D; B24D11/00; B24D13/00; B24D13/02; B24D13/06; B32B17/00; B32B17/02; B32B5/00; B32B5/02; B32B5/022; B32B5/024; C; C21; C21D; C21D7/00; C21D7/02; C21D7/04; C21D7/06; B32B2363/00; Y; Y10; Y10T; Y10T428/00; Y10T428/21; Y10T428/219; Y10T428/25; Y10T428/26; Y10T428/266; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2927; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/298; Y10T428/31504; Y10T428/31511; Y10T428/31551; Y10T428/31562; Y10T428/31725; Y10T428/31739; Y10T428/31765; Y10T428/31855; Y10T428/31931; Y10T428/31935; Y10T428/31942
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
152 words
AS A NEW ARTICLE OF MANUFACTURE, HAVING PARTICULAR UTILITY FOR FABRICATING FLAPS FOR USE IN A UNITARY SELF-CONTAINED PORTABLE ROTARY PEENING DEVICE, HAVING AN ANNULUS OF SAID FLAPS UNITED AT THEIR INNER ENDS TO A RIGID CORE, COMPRISING IN COMBINATION: A NONWOVEN LOFTY SHEET MATERIAL HAVING A THICKNESS OF ABOUT ONE CENTIMETER, A TENSILE STRENGTH OF ABOUT 16 KG/CM AND BEING FORMED OF RANDOMLY DISPOSED CRIMPED NYLON FILAMENT SEGMENTS HAVING DIAMETERS OF 40-200 MICRONS: RELATIVELY SMOOTH, HARD IMPACT-RESISTANT INORGANIC SPHEROIDAL PEENING PARTICLES HAVING AVERAGE DIAMETERS IN THE RANGE 0.1 -2.5 MM, DISPERSED THROUGHOUT SAID SHEET MATERIAL IN AN AMOUNT EQUAL TO ABOUT 400-700 CC/M2 OF SHEET SURFACE; AND A TOUGH STRONG ELASTIC ADHESIVE, HAVING AN ULTIMATE ELONGATION OF AT LEAST 100%, BONDING SAID FILAMENT SEGMENTS TO EACH OTHER AT LOCI OF INTERSECTION AND ALSO BONDING SAID PARTICLES TO SAID FIBERS WHILE SURROUNDING MORE THAN HALF OF THE EFFECTIVE DIAMETERS OF SAID PARTICLES.
Claim 2
Dependent Claim
152 words
AS A NEW ARTICLE OF MANUFACTURE, HAVING PARTICULAR UTILITY FOR FABRICATING FLAPS FOR USE IN A UNITARY SELF-CONTAINED PORTABLE ROTARY PEENING DEVICE, HAVING AN ANNULUS OF SAID FLAPS UNITED AT THEIR INNER ENDS TO A RIGID CORE, COMPRISING IN COMBINATION: A NONWOVEN LOFTY SHEET MATERIAL HAVING A THICKNESS OF ABOUT ONE CENTIMETER, A TENSILE STRENGTH OF ABOUT 16 KG/CM AND BEING FORMED OF RANDOMLY DISPOSED CRIMPED NYLON FILAMENT SEGMENTS HAVING DIAMETERS OF 40-200 MICRONS: RELATIVELY SMOOTH, HARD IMPACT-RESISTANT INORGANIC SPHEROIDAL PEENING PARTICLES HAVING AVERAGE DIAMETERS IN THE RANGE 0.1 -2.5 MM, DISPERSED THROUGHOUT SAID SHEET MATERIAL IN AN AMOUNT EQUAL TO ABOUT 400-700 CC/M2 OF SHEET SURFACE; AND A TOUGH STRONG ELASTIC ADHESIVE, HAVING AN ULTIMATE ELONGATION OF AT LEAST 100%, BONDING SAID FILAMENT SEGMENTS TO EACH OTHER AT LOCI OF INTERSECTION AND ALSO BONDING SAID PARTICLES TO SAID FIBERS WHILE SURROUNDING MORE THAN HALF OF THE EFFECTIVE DIAMETERS OF SAID PARTICLES.
Claim 3
Dependent Claim
46 words
The sheet material of claim 1 wherein the adhesive is a chain-extended polymer of tetrahydrofuran selected from the group consisting of the reaction product of isocyanate-terminated polytetrahydrofuran prepolymer and methylene dianiline and the reaction prOduct of an amine-terminated polytetrahydrofuran prepolymer and a bisphenol A-type epoxy resin.
Claim 4
Dependent Claim
20 words
The sheet material of claim 1 wherein the adhesive is a blend of phenolic resin and rubbery butadiene: acrylonitrile copolymer.
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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |