Patent US3850376A successfully refreshed from Google Patents.
US3850376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mantle for a gyratory crusher
Assignee: Fuller Co
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Filing: 1973-06-25
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Granted: 1974-11-26
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Expires: 1993-06-25
Abstract
Abstract A mantle for a gyratory crusher having a generally truncated conical shape and having a lower portion which is subjected to a greater crushing stress than the upper portion. The upper surface portion has at least one groove which is concentric with the axis of the mantle. During crushing operations, the mantle will grow due to the stresses applied during crushing. This growth will normally result in a bulging of the mantle. The groove in the mantle will permit the mantle to grow thereby reducing bulging. If the mantle is made of two pieces, the groove may be located at the junction of the two pieces.
Inventors
- 👤 E Mertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:54
CPC Classifications
B; B02; B02C; B02C2/00; B02C2/005
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
126 words
A mantle for use with a gyratory crusher including a normally fixed concave and a head mounted for gyratory movement relative to said concave whereby when said head gyrates, material between said concave and said head is crushed, said mantle comprising: wearable material generally shaped as a truncated cone adapted to be mounted on the head of a crusher and having an area of greatest stress when material is being crushed; said mantle having at least one groove in the surface thereof above the area of greatest stress for compensating for deformation of the wearable material caused by stress applied to the wearable material when material between the concave and the head is crushed whereby said groove will decrease in area when the wearable material deforms.
Claim 2
Dependent Claim
126 words
A mantle for use with a gyratory crusher including a normally fixed concave and a head mounted for gyratory movement relative to said concave whereby when said head gyrates, material between said concave and said head is crushed, said mantle comprising: wearable material generally shaped as a truncated cone adapted to be mounted on the head of a crusher and having an area of greatest stress when material is being crushed; said mantle having at least one groove in the surface thereof above the area of greatest stress for compensating for deformation of the wearable material caused by stress applied to the wearable material when material between the concave and the head is crushed whereby said groove will decrease in area when the wearable material deforms.
Claim 3
Dependent Claim
21 words
A mantle for use with a gyratory crusher according to claim 1 wherein said groove extends substantially circumferentially around said mantle.
Claim 4
Dependent Claim
28 words
A mantle for use with a gyratory crusher according to claim 2 wherein said groove is uninterrupted and is substantially normal to the longitudinal axis of the mantle.
Claim 5
Dependent Claim
26 words
A mantle for use with a gyratory crusher according to claim 1 wherein said groove has a saw-tooth pattern which extends substantially circumferentially around the mantle.
Claim 6
Dependent Claim
37 words
A mantle for use with a gyratory crusher according to claim 1 wherein there are a plurality of grooves in the mantle aligned with each other to form an interrupted groove which extends circumferentially around the mantle.
Claim 7
Dependent Claim
27 words
A mantle for use with a gyratory crusher according to claim 5 wherein each of said grooves is substantially normal to the longitudinal axis of the mantle.
Claim 8
Dependent Claim
33 words
A mantle for use with a gyratory crusher according to claim 1 wherein there are a plurality of grooves in the mantle, each being above the area of greatest stress on the mantle.
Claim 9
Dependent Claim
36 words
A mantle for use with a gyratory crusher according to claim 7 wherein at least one of said grooves extends substantially circumferentially around the mantle and is substantially normal to the longitudinal axis of the mantle.
Claim 10
Dependent Claim
66 words
A mantle for use with a gyratory crusher according to claim 1 wherein said mantle is made of at least two pieces each of which is generally shaped as a truncated cone and adapted to be mounted on the head of a crusher to form a mantle which is generally shaped as a truncated cone and said groove is located at the junction of the pieces.
Claim 11
Dependent Claim
33 words
A mantle for use with a gyratory crusher according to claim 9 wherein there are a plurality of grooves in said mantle, one of which is located at the junction of the pieces.
Claim 12
Dependent Claim
27 words
A mantle for use with a gyratory crusher according to claim 1 wherein said groove has a depth of about two-thirds the radial thickness of the mantle.
Claim 13
Dependent Claim
135 words
A crusher comprising first and second crushing members and a wearing part mounted on at least one of said crushing members; at least one of said crushing members being movable relative to the other of said crushing members whereby when one of said crushing members moves toward the other cRushing member, material is crushed; said crushing members and said wearing part being shaped so that the area of hardest work is in the lower portion of the wearing part; said wearing part having at least one groove in the surface thereof above the area of hardest work and having an uninterrupted surface in the area of hardest work; said groove being adapted to decrease in area to compensate for deformation of the material due to stress applied to the wearable material when material is crushed.
Claim 14
Dependent Claim
135 words
A crusher comprising first and second crushing members and a wearing part mounted on at least one of said crushing members; at least one of said crushing members being movable relative to the other of said crushing members whereby when one of said crushing members moves toward the other cRushing member, material is crushed; said crushing members and said wearing part being shaped so that the area of hardest work is in the lower portion of the wearing part; said wearing part having at least one groove in the surface thereof above the area of hardest work and having an uninterrupted surface in the area of hardest work; said groove being adapted to decrease in area to compensate for deformation of the material due to stress applied to the wearable material when material is crushed.
Claim 15
Dependent Claim
42 words
A crusher according to claim 12 wherein said first crushing member is a normally fixed concave and said second crushing member is a conical head mounted for gyratory movement relative to said concave and said wearing part is mounted on said head.
Claim 16
Dependent Claim
26 words
A crusher according to claim 13 wherein said wearing part has a generally truncated conical shape and said groove extends substantially circumferentially around said wearing part.
Claim 17
Dependent Claim
22 words
A crusher according to claim 14 wherein said groove is substantially normal to the longitudinal axis of the head and is uninterrupted.
Claim 18
Dependent Claim
20 words
A crusher according to claim 13 wherein said groove has a saw-tooth pattern which extends circumferentially around the wearing part.
Claim 19
Dependent Claim
33 words
A crusher according to claim 13 wherein there are a plurality of grooves in the wearing part aligned with each other to form an interrupted groove which extends circumferentially around the wearing part.
Claim 20
Dependent Claim
27 words
A crusher according to claim 12 wherein said wearing part is formed in two pieces and said groove is located at the junction of the two pieces.
Claim 21
Dependent Claim
32 words
A crusher according to claim 18 wherein there are a plurality of grooves in the wearing part and at least one of them is located at the junction of the two pieces.
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) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |