US3678629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal blasting wheel and blade therefor
Assignee: Wheelabrator Corp
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Filing: 1970-03-19
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Granted: 1972-07-25
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Expires: 1990-03-19
Abstract
Abstract A centrifugal blasting wheel is provided with throwing blades which have throwing surfaces curved at their inner ends to provide a surface for initial contact with particulate material being thrown. The surfaces are thus traveling in a plane substantially corresponding to the plane to which the particulate material is being propelled onto the blades in order to effect a smoother and more efficient transfer of material to the surface of the blades.
Inventors
- 👤 Raymond M Leliaert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:46
CPC Classifications
B; B24; B24C; B24C5/00; B24C5/06; B24C5/062
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
149 words
In a centrifugal blasting wheel having a rotor for rotation about an axis and provided with a central opening, means mounted within said central opening for propelling particulate material supplied thereto radially and tangentially outwardly, and a stationary control cage having an inner peripheral surface and a discharge port mounted within said central opening whereby the particulate material is propelled substantially tangentially to the inner peripheral surface of said control cage for controlling the direction of discharge of the particulate material; the improvement comprising a plurality of spaced radially extending blades having discharge ends extending from said central opening for propelling the particulate material from said discharge ends; each blade being provided with a propelling surface for engaging the particulate material, said propelling surface having a curved portion at its inner end curved away from the remainder of the propelling surface and the direction of rotation of the wheel.
Claim 2
Dependent Claim
149 words
In a centrifugal blasting wheel having a rotor for rotation about an axis and provided with a central opening, means mounted within said central opening for propelling particulate material supplied thereto radially and tangentially outwardly, and a stationary control cage having an inner peripheral surface and a discharge port mounted within said central opening whereby the particulate material is propelled substantially tangentially to the inner peripheral surface of said control cage for controlling the direction of discharge of the particulate material; the improvement comprising a plurality of spaced radially extending blades having discharge ends extending from said central opening for propelling the particulate material from said discharge ends; each blade being provided with a propelling surface for engaging the particulate material, said propelling surface having a curved portion at its inner end curved away from the remainder of the propelling surface and the direction of rotation of the wheel.
Claim 3
Dependent Claim
33 words
In the centrifugal blasting wheel of claim 1 wherein the propelling surface of each blade outwardly from said curved portion lies in a plane parallel to the axis of rotation of the wheel.
Claim 4
Dependent Claim
48 words
In the centrifugal blasting wheel of claim 1 wherein the radius of curvature of said curved portion is such as to present a surface portion traveling in substantially the same plane as a particle of particulate material at the point of contact with such material by a blade.
Claim 5
Dependent Claim
65 words
A blade for use with a centrifugal blasting wheel having an intended direction of rotation about an axis, said blade having inner and outer ends with a flat throwing surface extending therebetween for engagement with particulate material to be thrown by the wheel which surface is curved at the inner end in a direction away from its throwing surface and its intended direction of rotation.
Claim 6
Dependent Claim
65 words
A blade for use with a centrifugal blasting wheel having an intended direction of rotation about an axis, said blade having inner and outer ends with a flat throwing surface extending therebetween for engagement with particulate material to be thrown by the wheel which surface is curved at the inner end in a direction away from its throwing surface and its intended direction of rotation.
Claim 7
Dependent Claim
26 words
The blade of claim 4 wherein said throwing surface lies in a plane parallel to the axis of rotation of the wheel above said curved surface.
Claim 8
Dependent Claim
44 words
The blade of claim 4 wherein the curvature of said curved surface is such as to provide a surface having points traveling substantially in the same plane as a particle of particulate material at the point of contact with such particle by the blade.
Claim 9
Dependent Claim
34 words
The blade of claim 4 wherein the curved surface of the blade starts at the inner end in a direction away from its intended direction of rotation and curves back at its outer end.
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) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |