US4326676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating infeed tube for centrifugal impact rock crusher
Assignee: Clyde Corp
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Filing: 1980-05-12
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Granted: 1982-04-27
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Expires: 2000-05-12
Abstract
Abstract A centrifugal impact rock crusher having a centrally located rotary impeller table with a feed cone centrally located on it is equipped with a vertically reciprocating feed chute located above the feed cone. The mouth of the feed chute periodically moves downward to partially surround the feed cone to vertically distribute radial flow of material being crushed and thereby reduce concentration of impeller shoe and anvil face wear during crushing of uniformly sized gravel.
Inventors
- 👤 Neil M. Rose
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:38
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/14; B02C13/18; B02C13/1807; B02C13/1814; B02C13/26; B02C13/286; B02C2013/28618; B02C2013/28672; B02C2013/28681
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
In a centrifugal impact rock crusher of the type having an impeller table mounted for rotating about a generally vertical axis of rotation, a plurality of impellers located at angularly spaced intervals on the table and having faces extending above the table generally perpendicular thereto, a material distributing feed cone mounted centrally on the table, a feed chute located above the feed cone for distributing material to be crushed centrally onto the feed cone, and motor means for rotating the table and feed cone at a predetermined speed so that material deposited onto the feed cone is thrown radially outwardly from the feed cone intermediate the vertical extent of the impeller faces, the improvement comprising reciprocating means associated with said feed chute for cyclically raising and lowering the mouth thereof relative to said material feed cone.
Claim 2
Dependent Claim
136 words
In a centrifugal impact rock crusher of the type having an impeller table mounted for rotating about a generally vertical axis of rotation, a plurality of impellers located at angularly spaced intervals on the table and having faces extending above the table generally perpendicular thereto, a material distributing feed cone mounted centrally on the table, a feed chute located above the feed cone for distributing material to be crushed centrally onto the feed cone, and motor means for rotating the table and feed cone at a predetermined speed so that material deposited onto the feed cone is thrown radially outwardly from the feed cone intermediate the vertical extent of the impeller faces, the improvement comprising reciprocating means associated with said feed chute for cyclically raising and lowering the mouth thereof relative to said material feed cone.
Claim 3
Dependent Claim
55 words
The rock crusher of claim 1 wherein said feed chute is oriented so that said mouth moves between an upper position above the apex of said feed cone, and a lower position below the apex of said feed cone so that flow of material from said feed chute is partially restricted by said feed cone.
Claim 4
Dependent Claim
21 words
The rock crusher of claim 1 where said reciprocating means raise and lower said feed tube at 10-15 cycles per minute.
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) | 1985-04-26 | 1985-10-26 | 1986-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-26 | 1989-10-26 | 1990-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-26 | 1993-10-26 | 1994-04-27 | $7700.00 | Window Closed / Lapsed |