US3744728A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gyratory crusher having means for retaining spring compression for concave supporting upper frame
Assignee: Barber Greene Co
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Filing: 1971-12-27
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Granted: 1973-07-10
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Expires: 1991-12-27
Abstract
Abstract A gyratory crusher of the type having a pair of crushing members such as a generally concial shaped head and a cooperating concave which surrounds the head to form an annular crushing chamber therewith. The concave and its supporting upper frame are spring loaded on the main frame and in a downward direction for cooperation with the crushing head. Means are provided for maintaining the compression in the springs which bias the upper frame and its concave downwardly on the main frame, this means being shiftable to an inoperative position while the crusher is operative and the means then being shiftable to a spring compression retaining position whereby the upper frame and its concave can be detached and removed from the main frame.
Inventors
- 👤 E Treppish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:49
CPC Classifications
B; B02; B02C; B02C2/00; B02C2/02; B02C2/04; B02C2/045
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
125 words
A gyratory type crusher having a main frame, a crushing head mounted in said main frame, an upper frame removably mounted on said main frame and having a concave cooperable with said head to define an annular crushing chamber, compression spring means acting between said main frame and said upper frame for resiliently biasing the upper frame downwardly on said main frame, said compression spring means including adjustable means adjustable to a position to render said spring means ineffective to hold said upper frame and thereby permit said upper frame to be removed from said main frame; said adjustable means being adjustable to another position away from said main frame to permit said spring means to bias said upper frame downwardly on said main frame.
Claim 2
Dependent Claim
125 words
A gyratory type crusher having a main frame, a crushing head mounted in said main frame, an upper frame removably mounted on said main frame and having a concave cooperable with said head to define an annular crushing chamber, compression spring means acting between said main frame and said upper frame for resiliently biasing the upper frame downwardly on said main frame, said compression spring means including adjustable means adjustable to a position to render said spring means ineffective to hold said upper frame and thereby permit said upper frame to be removed from said main frame; said adjustable means being adjustable to another position away from said main frame to permit said spring means to bias said upper frame downwardly on said main frame.
Claim 3
Dependent Claim
226 words
A gyratory type crusher having a main frame, a generally conical shaped crushing head mounted in said main frame, an upper frame removably mounted on said main frame and for supporting a concave which cooperates with said head to define an annular crushing chamber, compression spring means acting between said main frame and said upper frame for resiliently biasing the upper frame downwardly on said main frame, said compression spring means including a lower spring retaining ring located generally around said main frame; threaded bolts extending through said ring, said main frame, and said upper frame; compression springs acting between said main frame and said lower spring retaining ring, first adjustable nut means on said bolts for compressing said springs when said nut means are tightened on said bolt means and thereby biasing said upper frame on said main frame, and second adjustable nut means on said bolt means and adjustable to one position in which said second nut means acts on said main frame independently of said first nut means to thereby compress said springs and permits the upper frame to be removed from said main frame; said second nut means being adjustable to another position away from said main frame to permit said springs to bias said upper frame, through said bolts, said first nut means and said ring, downwardly on said maIn frame.
Claim 4
Dependent Claim
226 words
A gyratory type crusher having a main frame, a generally conical shaped crushing head mounted in said main frame, an upper frame removably mounted on said main frame and for supporting a concave which cooperates with said head to define an annular crushing chamber, compression spring means acting between said main frame and said upper frame for resiliently biasing the upper frame downwardly on said main frame, said compression spring means including a lower spring retaining ring located generally around said main frame; threaded bolts extending through said ring, said main frame, and said upper frame; compression springs acting between said main frame and said lower spring retaining ring, first adjustable nut means on said bolts for compressing said springs when said nut means are tightened on said bolt means and thereby biasing said upper frame on said main frame, and second adjustable nut means on said bolt means and adjustable to one position in which said second nut means acts on said main frame independently of said first nut means to thereby compress said springs and permits the upper frame to be removed from said main frame; said second nut means being adjustable to another position away from said main frame to permit said springs to bias said upper frame, through said bolts, said first nut means and said ring, downwardly on said maIn frame.
Claim 5
Dependent Claim
225 words
In a gyratory crusher of the type having a main frame, a crushing head mounted in said main frame, an upper frame and concave assembly removably mounted on said main frame and having a concave which cooperates with said head to define an annular crushing chamber, compression spring means acting between said main frame and said assembly for resiliently biasing said assembly downwardly on said main frame, said compression spring means including a lower spring retaining ring located generally around said main frame; threaded bolts extending through said ring, said main frame, and said assembly; compression springs acting between said main frame and said lower spring retaining ring, and first adjustable nut means on said bolts for compressing said springs when said nut means are tightened on said bolt means and thereby biasing said assembly on said main frame; the improvement comprising, second adjustable nut means on said bolt means and adjustable to one position in which said second nut means acts on said main frame independently of said first nut means to thereby compress said springs and permits said assembly to be removed from said main frame; said second nut means being adjustable to another position away from said main frame to permit said springs to bias said assembly through said bolts, said first nut means and said ring, downwardly on said main frame.
Claim 6
Dependent Claim
225 words
In a gyratory crusher of the type having a main frame, a crushing head mounted in said main frame, an upper frame and concave assembly removably mounted on said main frame and having a concave which cooperates with said head to define an annular crushing chamber, compression spring means acting between said main frame and said assembly for resiliently biasing said assembly downwardly on said main frame, said compression spring means including a lower spring retaining ring located generally around said main frame; threaded bolts extending through said ring, said main frame, and said assembly; compression springs acting between said main frame and said lower spring retaining ring, and first adjustable nut means on said bolts for compressing said springs when said nut means are tightened on said bolt means and thereby biasing said assembly on said main frame; the improvement comprising, second adjustable nut means on said bolt means and adjustable to one position in which said second nut means acts on said main frame independently of said first nut means to thereby compress said springs and permits said assembly to be removed from said main frame; said second nut means being adjustable to another position away from said main frame to permit said springs to bias said assembly through said bolts, said first nut means and said ring, downwardly on said main frame.
References Cited (Backward Citations)
US3009660A
Cited
US3614023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |