US3684196A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for selectively crushing aggregate
Assignee: GLEN W HANKINS
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Filing: 1970-04-15
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Granted: 1972-08-15
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Expires: 1990-04-15
Abstract
Abstract The method and means of crushing soft aggregate out of harder aggregate by moving the aggregate between concaves and a powered rotor wherein the concaves are yieldable relative to the rotor and one of which is reciprocally powered to facilitate moving the aggregate under pressure while being confined between the concaves and the turning rotor. The concaves are pivotally connected together and a spring means engages the pivotal connection to bias it toward the rotor. The concave at the outlet of the working chamber is limited in its travel towards the rotor thereby allowing aggregate smaller than the spacing between the concave and the rotor to pass on through. The working chamber is tapered from the concave hinge point to the outlet to provide a restrictive discharge opening.
Inventors
- 👤 Glen W Hankins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:00
CPC Classifications
B; B02; B02C; B02C1/00; B02C1/02; B02C1/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
203 words
A selective aggregate crusher comprising, a frame yieldably supporting a plurality of hinged together concaves defining a working chamber in which a powered rotor is positioned, said working chamber having an inlet opening and a discharge outlet opening, said inlet and discharge outlet openings being located on opposite sides of said rotor, said working chamber tapering from at least the hinged connection of said concaves closest to said outlet opening to said outlet opening, said concaves having such a size to cumulatively cover at least 180* around said rotor, said rotor having a stationary axis of rotation and said concaves being yieldable relative to said rotor, said rotor and said concaves each having opposing bearing surfaces whereby as aggregate material is moved from said inlet opening to said outlet opening between said rotor and said concaves it is moved while being confined and under pressure, and said plurality of concaves hingeably connected together including two concaves hinged together at adjacent ends and having an axis of pivotable movement about a shaft yieldably supported by said frame whereby said two concaves are free to move towards and away from said rotor in response to appropriate pressure on said two concaves in said working chamber.
Claim 2
Dependent Claim
29 words
The structure of claim 2 wherein a guide rod is connected to said shaft and extends substantially perpendicular thereto and is secured to said frame remotely of said shaft.
Claim 3
Dependent Claim
60 words
The structure of claim 2 wherein one of said two concaves includes a spring means extending between said one concave and said frame to yieldably urge said one concave towards said rotor, and a two-way power cylinder is connected between said other concave and said frame for continuously and alternately pivoting said other concave towards and away from said rotor.
Claim 4
Dependent Claim
51 words
The structure of claim 4 wherein said control means is associated with said other concave and said power cylinder such that it is operable by said other concave upon moving a predetermined distance towards and away from said rotor to reverse directions of movement of said cylinder and said other concave.
Claim 5
Dependent Claim
48 words
The structure of claim 5, wherein said one concave includes a stop means for limiting the travel of said one concave towards said rotor whereby aggregate material having a smaller size than the minimum distance between said rotor and one concave may pass out of said discharge opening.
Claim 6
Independent Claim
148 words
The method of selectively crushing unsound soft material contained in hard aggregate materials including the steps of, feeding and confiNing aggregate in a working chamber tapering towards a restricted outlet and defined by a plurality of concaves pivoted together and yieldably biased towards a rotating rotor with the concave at the outlet being closely spaced to said rotor with only rotational clearance therebetween, and crushing said unsound soft material between pieces of hard aggregate and said hard aggregate and said concaves and rotor by continuously moving the aggregate including the unsound soft material in the working chamber while maintaining continuous pressure on the aggregate as it is confined by the concaves floating relative to the rotor as the materials flow through the working chamber whereby said concaves are continuously reciprocated towards and away from said rotor by said hard aggregate being forced between said concaves and said rotor.
Claim 7
Dependent Claim
31 words
The method of claim 7 wherein the step of moving the aggregate in the working chamber is accomplished by reciprocating one of the concaves towards and away from the rotating rotor.
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) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |