US3785105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal blasting wheel
Assignee: Wheelabrator Corp
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Filing: 1972-04-05
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Granted: 1974-01-15
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Expires: 1992-04-05
Abstract
Abstract A centrifugal blasting wheel is provided which permits rapid and easy blade removal and replacement by providing: a control cage and impeller which can be removed from a central opening defined by the inner ends of the radially extending blades; a blade holding means which utilizes the spacers holding the wheel side plates apart to engage a holding shoulder on the blades to prevent further radial outward movement; and a removable centering plate mounted in the central opening to prevent radial inward movement.
Inventors
- 👤 A Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:55
CPC Classifications
E; E04; E04G; E04G9/00; E04G9/02; E04G9/04; B; B24; B24C; B24C5/00; B24C5/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
250 words
In a centrifugal blasting wheel mounted for rotation comprising: a pair of spaced circular side walls; cylindrical spacer means mounted in said side walls and extending therebetween to maintain them in spaced apart relation; a plurality of circumferentially spaced radially extending blades mounted between said side walls; said blades having inner and outer ends and front and rear surfaces, the front surface thereof constituting a throwing surface; said inner ends of said blades defining a central opening; a hollow vaned impeller mounted in said central opening for rotation with the wheel; a stationary control cage encompassing said impeller and having a discharge port; and one of said side walls having an opening therein substantially coextensive with said central opening to provide access to said central opening, said impeller and said control cage; the improvement wherein: each blade being of a length between its inner and outer ends less than the diameter of said central opening and the opening in said one of said side walls; each blade having a side rail extending along its length on either side of said throwing surface and extending away from its rear surface; each side rail having a curved surface matching a surface on said spacer means whereby each said blade may be inserted through said central opening and moved radially outward between said side plates until the matching surfaces on said side rails engage the surface of said spacer means and each said throwing blade will be prevented from further radially outward movement.
Claim 2
Dependent Claim
250 words
In a centrifugal blasting wheel mounted for rotation comprising: a pair of spaced circular side walls; cylindrical spacer means mounted in said side walls and extending therebetween to maintain them in spaced apart relation; a plurality of circumferentially spaced radially extending blades mounted between said side walls; said blades having inner and outer ends and front and rear surfaces, the front surface thereof constituting a throwing surface; said inner ends of said blades defining a central opening; a hollow vaned impeller mounted in said central opening for rotation with the wheel; a stationary control cage encompassing said impeller and having a discharge port; and one of said side walls having an opening therein substantially coextensive with said central opening to provide access to said central opening, said impeller and said control cage; the improvement wherein: each blade being of a length between its inner and outer ends less than the diameter of said central opening and the opening in said one of said side walls; each blade having a side rail extending along its length on either side of said throwing surface and extending away from its rear surface; each side rail having a curved surface matching a surface on said spacer means whereby each said blade may be inserted through said central opening and moved radially outward between said side plates until the matching surfaces on said side rails engage the surface of said spacer means and each said throwing blade will be prevented from further radially outward movement.
Claim 3
Dependent Claim
33 words
A centrifugal blasting wheel as defined in claim 1 including a centering plate disposed in said central opening on one side thereof and having a portion engaging the inner ends of said blades.
Claim 4
Dependent Claim
44 words
A centrifugal blasting wheel as defined in claim 1 wherein said side plates have a plurality of circumferentially spaced pairs of opposing radially extending grooves formed on the interior thereof and the side rails of each blade engage in a pair of said grooves.
Claim 5
Dependent Claim
32 words
A centrifugal blasting wheel as defined in claim 3 wherein each of said pair of grooves extend radially adjacent said spacer means and a portion of said spacer means overlies said grooves.
Claim 6
Dependent Claim
80 words
A centrifugal blasting wheel as defined in claim 1 wherein said side rails extend over the entire length of said blades and said side rail surfaces are provided intermediate the length of said side rails and the side rail portion starting from the inner end of a blade extends further away from the surface of the blade than does the side rail portion starting from the outer end of the blade and said surfaces join the two side rail portions.
Claim 7
Dependent Claim
33 words
A centrifugal blasting wheel as defined in claim 5 including a centering plate disposed in said central opening on one side thereof and having a portion engaging the inner ends of said blades.
Claim 8
Dependent Claim
44 words
A centrifugal blasting wheel as defined in claim 6 wherein said siDe plates have a plurality of circumferentially spaced pairs of opposing radially extending grooves formed on the interior thereof and the side rails of each blade engage in a pair of said grooves.
Claim 9
Dependent Claim
86 words
A blade for use with a centrifugal blasting wheel having a first end and a second end, front and rear surfaces, the front surface thereof constituting a throwing surface extending between said first and second ends, a pair of side rails, one of each pair of side rails extending along the length of the blade on either side of said throwing surface and rearwardly thereof, a first portion of each of said side rails extending further rearwardly of said throwing surface than a second portion thereof.
Claim 10
Dependent Claim
86 words
A blade for use with a centrifugal blasting wheel having a first end and a second end, front and rear surfaces, the front surface thereof constituting a throwing surface extending between said first and second ends, a pair of side rails, one of each pair of side rails extending along the length of the blade on either side of said throwing surface and rearwardly thereof, a first portion of each of said side rails extending further rearwardly of said throwing surface than a second portion thereof.
Claim 11
Dependent Claim
35 words
A blade as defined in claim 1 wherein each of said side rails extend the entire length of the blade and said surface of each of said side rails is provided intermediate the length thereof.
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) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |