Patent US3936979A successfully refreshed from Google Patents.
US3936979A
Expired / Lapsed
US
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Particle-releasing mounting system for the blades of blasting machines
Assignee: Benfur Engineering Co
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Filing: 1974-10-10
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Granted: 1976-02-10
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Expires: 1994-10-10
Abstract
Abstract The blades of a rotary blasting machine are removably mounted on a rotor bracket in a spaced relationship with the bracket outwardly from a point of contact at the inner extremity of the blade-bracket junction. Preferably, the space diverges outwardly, and an inner portion of the blade hooks over the bracket to resist centrifugal force acting on the blade, and also seal the junction against ingress of abrasive particles.
Inventors
- 👤 Bernard Fuerst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:49
CPC Classifications
B; B24; B24C; B24C5/00; B24C5/06; B24C5/062; Y; Y10; Y10S; Y10S101/00; Y10S101/37
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
121 words
A blasting machine having a rotor including a rotatable shaft and a plate mounted on said shaft in a plane normal to the axis of rotation of said shaft, and also including at least one bracket secured to said plate and a blade detachably secured to said bracket in a position adjacent a radial plane containing said axis, said machine also including feeding means adapted to supply abrasive material to the central portion of said rotor for engagement with said blade, wherein the improvement comprises: projection means on at least one of said bracket and said blade extending from the face of said one of said bracket and blade opposite the other thereof and establishing a space between said opposite faces.
Claim 2
Dependent Claim
121 words
A blasting machine having a rotor including a rotatable shaft and a plate mounted on said shaft in a plane normal to the axis of rotation of said shaft, and also including at least one bracket secured to said plate and a blade detachably secured to said bracket in a position adjacent a radial plane containing said axis, said machine also including feeding means adapted to supply abrasive material to the central portion of said rotor for engagement with said blade, wherein the improvement comprises: projection means on at least one of said bracket and said blade extending from the face of said one of said bracket and blade opposite the other thereof and establishing a space between said opposite faces.
Claim 3
Dependent Claim
13 words
A machine as defined in claim 1, wherein said space diverges radially outward.
Claim 4
Dependent Claim
37 words
A machine as defined in claim 1, wherein said blade has a portion overhanging the inner extremity of the junction between said blade and bracket as a shield for said junction against the entrance of abrasive particles.
Claim 5
Dependent Claim
23 words
A machine as defined in claim 3, wherein said portion and bracket interengage to resist the centrifugal forces normally acting on said blade.
References Cited (Backward Citations)
US2752098A
Cited
US3000579A
Cited
US3032169A
Cited
US3436867A
Cited
US3474974A
Cited
US3540667A
Cited
US3606182A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-09 | 1979-08-11 | 1980-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-09 | 1983-08-11 | 1984-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-09 | 1987-08-11 | 1988-02-10 | $7700.00 | Window Closed / Lapsed |