Patent US4001976A successfully refreshed from Google Patents.
US4001976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for cleaning casting
Assignee: Wheelabrator Corp
•
Filing: 1975-06-23
•
Granted: 1977-01-11
•
Expires: 1995-06-23
Abstract
Abstract An apparatus is disclosed for removing molding sand from a cast part. The apparatus includes an open framework vibratory mechanism for causing movement of the molded parts through a tunnel-like member. This movement shakes and jolts the parts to loosen sand and free it from the casting. Also provided are particulate blasting means located at strategic positions in the tunnel enhancing removal of the mold sand.
Inventors
- 👤 William Robertson MacMillan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:33
CPC Classifications
B; B24; B24C; B24C3/00; B24C3/08; B24C3/088
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
A device for removing mold sand from castings comprising: a. an open framework vibratory conveyor receiving said castings and subjecting them to a jolting action to loosen and break up said sand; b. a blast enclosure disposed about at least a portion of said conveyor; and c. blasting means mounted to said enclosure for throwing particulate at said castings through said open framework to enhance and accelerate the breakup and removal of sand by said vibratory conveyor, said open framework conveyor including a plurality of spaced bars which support and guide said casting, and wherein the configuration of said bars changes to alter the spatial orientation of the castings thereby to subject a greater portion of the castings to the blast means.
Claim 2
Independent Claim
122 words
A device for removing mold sand from castings comprising: a. an open framework vibratory conveyor receiving said castings and subjecting them to a jolting action to loosen and break up said sand; b. a blast enclosure disposed about at least a portion of said conveyor; and c. blasting means mounted to said enclosure for throwing particulate at said castings through said open framework to enhance and accelerate the breakup and removal of sand by said vibratory conveyor, said open framework conveyor including a plurality of spaced bars which support and guide said casting, and wherein the configuration of said bars changes to alter the spatial orientation of the castings thereby to subject a greater portion of the castings to the blast means.
Claim 3
Dependent Claim
21 words
The device according to claim 1 wherein said blast means throws particulate at said casting through the spaces between adjacent bars.
Claim 4
Dependent Claim
27 words
The device according to claim 1 further including a second vibratory conveyor for receiving the treated castings, said conveyor effecting removal of spent particulate from the castings.
Claim 5
Dependent Claim
37 words
The device of claim 1 wherein the device further includes means for collecting spent particulate and debris, and means for separating the particulate from said debris whereby the particulate is recirculated to the blasting means for reuse.
Claim 6
Dependent Claim
14 words
The device of claim 1 wherein said blasting means are airless centrifugal blasting wheels.
References Cited (Backward Citations)
US587892A
Cited
US2204636A
Cited
US2887826A
Cited
US3690066A
Cited
US3829029A
Cited
US3793780A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |