Patent US3707266A successfully refreshed from Google Patents.
US3707266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crushing machines
Assignee: Individual
•
Filing: 1970-12-07
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Granted: 1972-12-26
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Expires: 1990-12-07
Abstract
Abstract A crusher adapted to crush clay for the manufacture of bricks and tiles, even when the raw material is somewhat moist. To this end, two upper rollers are provided each with an annular series of parallel rods to cause the material to be thrown off one rotor on to the other before it is comminuted between two smaller lower rollers and forms a homogeneous mixture.
Inventors
- 👤 Gerard J Llabres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:27
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/20
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
A rotary crusher comprising a substantially parallelopipedic casing, two main equal upper rotors having parallel horizontal axes, adapted to revolve in opposite directions round their axes towards each other, and each of said upper rotors including an annular series of bars parallel with the direction of the axis of the upper rotor, and a smooth cylindrical surface the axis of which is parallel with the direction of the axis of the upper rotor located within said annular series, said upper rotors being spaced horizontally by a distance slightly less than their radius, and two auxiliary lower rotors, the axes of said lower rotors being parallel with Those of the upper rotors and substantially tangent in the plane of their axes with a slight clearance therebetween, each of said auxiliary lower rotors including an annular series of bars parallel with the direction of the axis of the lower rotor and being located underneath the corresponding upper rotor in substantial tangential relationship with reference thereto and adapted to rotate in the same direction as said upper rotor.
Claim 2
Dependent Claim
175 words
A rotary crusher comprising a substantially parallelopipedic casing, two main equal upper rotors having parallel horizontal axes, adapted to revolve in opposite directions round their axes towards each other, and each of said upper rotors including an annular series of bars parallel with the direction of the axis of the upper rotor, and a smooth cylindrical surface the axis of which is parallel with the direction of the axis of the upper rotor located within said annular series, said upper rotors being spaced horizontally by a distance slightly less than their radius, and two auxiliary lower rotors, the axes of said lower rotors being parallel with Those of the upper rotors and substantially tangent in the plane of their axes with a slight clearance therebetween, each of said auxiliary lower rotors including an annular series of bars parallel with the direction of the axis of the lower rotor and being located underneath the corresponding upper rotor in substantial tangential relationship with reference thereto and adapted to rotate in the same direction as said upper rotor.
Claim 3
Dependent Claim
61 words
A rotary crusher as claimed in claim 1, including a cylindrical screen adapted to revolve at a high speed and extending in parallel relationship with the upper and lower rotor axes substantially along a line in registry with the crossing of the common planes tangent to the upper rotors and to each of the lower rotors and its corresponding upper rotor.
Claim 4
Dependent Claim
57 words
A rotary crusher as claimed in claim 1 wherein the casing includes an upper wall provided with an opening through which material is adapted to be fed vertically onto one of the rotating series of annular bars and said upper wall sloping downward away from said opening whereby clogging of said apparatus by said material is prevented.
Claim 5
Dependent Claim
51 words
A rotary crusher as claimed in claim 1 wherein the diameters of the lower rotors are equal to one half that of the upper rollers and said series of annular bars on said upper rotors rotate at twice the speed of the corresponding series of annular bars on said lower rotors.
Claim 6
Dependent Claim
21 words
A rotary crusher as claimed in claim 1, wherein the lower and upper rotors all revolve at the same angular speed.
Claim 7
Dependent Claim
45 words
A rotary crusher as recited in claim 1 wherein each of said upper and lower rotors comprises a central shaft, a plate carried at each end of said shaft, each of said annular series of bars being held in fixed position between said opposed plates.
Claim 8
Dependent Claim
30 words
A rotary crusher as claimed in claim 6 wherein each of said upper rotors includes a cylindrical shield held between said discs and lying in coaxial relationship with said shaft.
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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |