US3867791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive blasting machine
Assignee: Individual
•
Filing: 1974-05-13
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Granted: 1975-02-25
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Expires: 1994-05-13
Abstract
Abstract An improved abrasive blasting machine comprises radially extending throwing blades mounted on a wheel by means of blade blocks. Each blade block has a first groove near an inner end of the block and a second groove near an outer end. Each blade includes lugs for insertion in the grooves. The improved blasting machine includes a centrally disposed impeller which restricts the movement of the blades, particularly in a radial direction. Preferably, this is accomplished by employing an impeller having a shoulder which contacts the inner ends of the blades.
Inventors
- 👤 James R Goff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:50
CPC Classifications
B; B24; B24C; B24C5/00; B24C5/06; B24C5/062
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
207 words
In a rotatable centrifugal abrasive blasting device comprising a driven wheel; a plurality of circumferentially spaced radially extending blades mounted on said wheel, said blades having inner and outer ends and front and rear surfaces; said inner ends of said blades defining a central opening; a hollow, vaned, driven impeller mounted in said central opening rotatable with said wheel; a stationary control cage around said impeller, said control cage having an opening therein for the passage of abrasive material from said impeller onto said blades; and means for feeding particulate, abrasive material to said impeller; the improvement wherein said blades are mounted on said wheel by means of blade blocks on said wheel; said blade blocks having inner and outer ends; each of said blade blocks having a first groove proximate its inner end and a second groove proximate its outer end; each of said blades having a first lug on its inner, rear surface for insertion in said first groove of said block, and a second lug on the rear of each blade, said second lug intermediate the ends of the blade for insertion in said second groove of said block; and further wherein said impeller obstructs movement of said blades in a direction radially inward.
Claim 2
Dependent Claim
207 words
In a rotatable centrifugal abrasive blasting device comprising a driven wheel; a plurality of circumferentially spaced radially extending blades mounted on said wheel, said blades having inner and outer ends and front and rear surfaces; said inner ends of said blades defining a central opening; a hollow, vaned, driven impeller mounted in said central opening rotatable with said wheel; a stationary control cage around said impeller, said control cage having an opening therein for the passage of abrasive material from said impeller onto said blades; and means for feeding particulate, abrasive material to said impeller; the improvement wherein said blades are mounted on said wheel by means of blade blocks on said wheel; said blade blocks having inner and outer ends; each of said blade blocks having a first groove proximate its inner end and a second groove proximate its outer end; each of said blades having a first lug on its inner, rear surface for insertion in said first groove of said block, and a second lug on the rear of each blade, said second lug intermediate the ends of the blade for insertion in said second groove of said block; and further wherein said impeller obstructs movement of said blades in a direction radially inward.
Claim 3
Dependent Claim
44 words
A centrifugal blasting device according to claim 1 in which the wheel has an opening centrally disposed therein and said impeller protrudes into said opening in said wheel, and further wherein said impeller has a shoulder which locks the blades to the blade blocks.
Claim 4
Dependent Claim
38 words
A centrifugal blasting device according to claim 1 in which each of said second grooves is provided with a cavity, and a blade retainer clip is secured to said second lug, said clip being secured in said cavity.
Claim 5
Dependent Claim
65 words
A centrifugal blasting device according to claim 2 in which the impeller abuts a surface of a hub which connects the wheel to the shaft of a motor, said hub having a pilot hole machined in a surface thereof for alignment with a pilot hole in the impeller, and a pin connects the pilot hole in the hub to the pilot hole in the impeller.
Claim 6
Dependent Claim
24 words
A centrifugal blasting device according to claim 1 in which said device includes a centering plate which together with the impeller comprise one piece.
Claim 7
Dependent Claim
35 words
A centrifugal blasting device according to claim 1 in which the impeller has a plurality of discrete fingers having openings therebetween, said fingers defining a central opening for receiving abrasive material from said feeding means.
Claim 8
Dependent Claim
44 words
A centrifugal blasting device according to claim 1 in which said device is driven by a motor having a motor shaft, said impeller is connected to said motor shaft and said impeller has an opening therein for insertion of a portion of said shaft.
Claim 9
Dependent Claim
24 words
A centrifugal blasting device according to claim 3 in which said device includes a centering plate which together with the impeller comprise one piece.
Claim 10
Dependent Claim
35 words
A centrifugal blasting device according to claim 8 in which the impeller has a plurality of discrete fingers having openings therebetween, said fingers defining a central opening for receiving abrasive material from said feeding means.
Claim 11
Dependent Claim
47 words
A centrifugal blasting device according to claim 9 in which said device is driven by a motor having a motor shaft, said impeller is connected to said motor shaft and said impeller has an opening therein for insertion of at least a portion of of said shaft.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |