Patent US5148097A successfully refreshed from Google Patents.
Patent US4244150A successfully refreshed from Google Patents.
US4244150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
One-piece abrasive blasting wheel
Assignee: GEORGE FISCHER FOUNDRY SYSTEMS Inc A CORP OF MICHIGAN
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Filing: 1979-06-08
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Granted: 1981-01-13
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Expires: 1999-06-08
Abstract
Abstract A blast wheel for a rotatable centrifugal abrasive blasting device comprises a wheel having a front surface and a rear surface. A plurality of radially extending abrasive throwing blades are substantially equally spaced around the circumference of the front surface of the wheel. A vaned impeller is also on the front surface of the wheel. A ring is rigidly secured to the rear surface of the wheel. The blast wheel is a one-piece casting formed of dissimilar materials, such that the wheel, blades and impeller are formed of an abrasion-resistant material having relatively poor machinability. The ring is formed of a material having good machinability. The blast wheel is useful for projecting an abrasive, such as metal shot, against a surface to be treated.
Inventors
- 👤 James R. Goff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:15
CPC Classifications
B; B24; B24C; B24C5/00; B24C5/06; B24C5/064
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
111 words
A blast wheel for rotatable, centrifugal abrasive blasting device comprising a wheel having a front surface and a rear surface; a plurality of radially extending abrasive throwing blades on the front surface of said wheel, wherein said blades are substantially equally spaced around the circumference of said wheel; a vaned impeller on the front surface of said wheel; and a ring rigidly secured to the rear surface of said wheel; wherein said device is a one-piece casting formed of dissimilar materials, such that said wheel, said blades and said impeller are formed of an abrasion-resistant material having relatively poor machinability, and said ring is formed of a material having good machinability.
Claim 2
Dependent Claim
111 words
A blast wheel for rotatable, centrifugal abrasive blasting device comprising a wheel having a front surface and a rear surface; a plurality of radially extending abrasive throwing blades on the front surface of said wheel, wherein said blades are substantially equally spaced around the circumference of said wheel; a vaned impeller on the front surface of said wheel; and a ring rigidly secured to the rear surface of said wheel; wherein said device is a one-piece casting formed of dissimilar materials, such that said wheel, said blades and said impeller are formed of an abrasion-resistant material having relatively poor machinability, and said ring is formed of a material having good machinability.
Claim 3
Dependent Claim
33 words
Blast wheel according to claim 1, wherein said impeller comprises a plurality of discrete fingers having openings therebetween, each finger extending in a direction substantially normal to the front surface of said wheel.
Claim 4
Dependent Claim
28 words
Blast wheel according to claim 2, wherein said abrasion-resistant material is a ferrous metal or metal alloy having a Rockwell Hardness Number of about C45 to about C70.
Claim 5
Dependent Claim
32 words
Blast wheel according to claims 2 or 3, wherein said material of good machinability is a ferrous metal or metal alloy having a Brinell Hardness Number of about 180 to about 235.
Claim 6
Dependent Claim
28 words
Blast wheel according to claim 2, wherein said abrasion-resistant material is a ferrous metal or metal alloy having a Rockwell Hardness Number of about C60 to about C68.
Claim 7
Dependent Claim
32 words
Blast wheel according to claims 2 or 5, wherein said material of good machinability is a ferrous metal or metal alloy having a Brinell Hardness Number of about 187 to about 229.
Claim 8
Dependent Claim
32 words
Blast wheel according to claims 2 or 5, wherein said material of good machinability is a ferrous metal or metal alloy having a Brinell Hardness Number of about 195 to about 205.
Claim 9
Dependent Claim
146 words
A blast wheel for a rotatable, centrifugal abrasive blasting device comprising a wheel having a front surface and a rear surface; a plurality of radially extending abrasive throwing blades on the front surface of said wheel, wherein said blades are substantially equally spaced around the circumference of said wheel; a vaned impeller on the front surface of said wheel; and a ring rigidly secured to the rear surface of said wheel; wherein said device is a one-piece casting formed of dissimilar materials, such that said wheel, said blades and said impeller are formed of an abrasion-resistant ferrous metal or metal alloy having a Rockwell Hardness Number of about C 45 to about C 70 and having relatively poor machinability, and said ring is formed of a ferrous metal or metal alloy having a Brinell Hardness Number of about 180 to about 235 and having good machinability.
Claim 10
Dependent Claim
146 words
A blast wheel for a rotatable, centrifugal abrasive blasting device comprising a wheel having a front surface and a rear surface; a plurality of radially extending abrasive throwing blades on the front surface of said wheel, wherein said blades are substantially equally spaced around the circumference of said wheel; a vaned impeller on the front surface of said wheel; and a ring rigidly secured to the rear surface of said wheel; wherein said device is a one-piece casting formed of dissimilar materials, such that said wheel, said blades and said impeller are formed of an abrasion-resistant ferrous metal or metal alloy having a Rockwell Hardness Number of about C 45 to about C 70 and having relatively poor machinability, and said ring is formed of a ferrous metal or metal alloy having a Brinell Hardness Number of about 180 to about 235 and having good machinability.
References Cited (Backward Citations)
US1130210A
Cited
US2204610A
Cited
US2204611A
Cited
US2135550A
Cited
US2368664A
Cited
US2352588A
Cited
US2958165A
Cited
DE2538228A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-13 | 1984-07-14 | 1985-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-13 | 1988-07-14 | 1989-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-13 | 1992-07-14 | 1993-01-13 | $7700.00 | Window Closed / Lapsed |