US3767127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact crusher
Assignee: Acrowood Corp
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Filing: 1971-12-20
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Granted: 1973-10-23
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Expires: 1991-12-20
Abstract
Abstract An impact crusher having a circular housing with an upper feed tube extending through a cover portion. The feed tube directs material to be reduced to an impeller unit. The impeller unit includes impeller shoes supported between impeller discs which rotate at high speed, and rocks fed to the shoes are impelled by the shoes against outwardly located breaker plates. The impeller shoes are V-shaped in horizontal cross section with the point or apex of the V being directed inwardly toward the center of the impeller unit. The V-shaped impeller shoes have impelling surfaces on two sides thereof for operation in either direction of rotation of the impelling unit. The shoes are held in place by posts and are constructed of at least two plate-like parts disposed flatwise in surface engagement facilitating individual replacement or shifting around to prolong the life of the shoes in their entirety. In one embodiment, the impeller shoes have hardened inserts on the impelling surfaces thereof to provide minimum replacement.
Inventors
- 👤 B Wood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:48
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/14; B02C13/18; B02C13/1807; B02C13/1835
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
172 words
In an impact type crusher a. a housing, b. an impeller unit rotatably mounted in said housing and having inner and outer radially disposed portions; c. at least one impeller shoe mounted on said impeller unit arranged to impel rock outwardly, d. said impeller shoe being V-shaped, having a pair of leg portions of substantially the same length and meeting horizontally in an apex, e. the area between said leg portions forming an outwardly opening recess, f. said apex being directed inwardly of the impeller unit, g. said leg portions having outer side surfaces which comprise rock engaging faces for impelling rock outwardly, h. said side surfaces being arranged such that one of said surfaces impels rock outwardly in the forward direction of rotation of said impeller unit and the other of said surfaces impels rock outwardly in the reverse direction of rotation of said impeller unit, i. and anchor means secured to said impeller unit and engaged in said recess of said shoe to hold the latter on the impeller unit.
Claim 2
Dependent Claim
172 words
In an impact type crusher a. a housing, b. an impeller unit rotatably mounted in said housing and having inner and outer radially disposed portions; c. at least one impeller shoe mounted on said impeller unit arranged to impel rock outwardly, d. said impeller shoe being V-shaped, having a pair of leg portions of substantially the same length and meeting horizontally in an apex, e. the area between said leg portions forming an outwardly opening recess, f. said apex being directed inwardly of the impeller unit, g. said leg portions having outer side surfaces which comprise rock engaging faces for impelling rock outwardly, h. said side surfaces being arranged such that one of said surfaces impels rock outwardly in the forward direction of rotation of said impeller unit and the other of said surfaces impels rock outwardly in the reverse direction of rotation of said impeller unit, i. and anchor means secured to said impeller unit and engaged in said recess of said shoe to hold the latter on the impeller unit.
Claim 3
Dependent Claim
37 words
The impact type crusher of claim 1 wherein said recess is V-shaped and said anchor means comprise posts having angled side surfaces abutting against the walls of said recess for holding said shoe on the impeller unit.
Claim 4
Dependent Claim
22 words
The impact type crusher of claim 1 wherein said shoe has free abutting engagement with the post for easy installation and removal.
Claim 5
Dependent Claim
65 words
The impact type crusher of claim 2 wherein said impeller unit includes a plurality of said shoes and said post means in spaced relation therearound, a lower impeller disc supporting said shoes freely thereon and integrally supporting said post means, and wear plates secured on the upper surface of said impeller disc in the area between said shoes to protect said disc from flying rock.
Claim 6
Dependent Claim
94 words
The impact type crusher of claim 2 wherein said impeller unit includes a plurality of Said shoes and said post means in spaced relation therearound, a lower impeller disc supporting said shoes freely thereon and integrally supporting said post means, an upper impeller disc on said post means, removable fastening means securing said impeller disc to said post means, and wear plates secured on the upper surface of said lower impeller disc and the lower surface of said upper impeller disc in the area between said shoes to protect said discs from flying rock.
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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |