US3894698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jaw crusher
Assignee: Morgardshammar AB
•
Filing: 1973-11-08
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Granted: 1975-07-15
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Expires: 1993-11-08
Abstract
Abstract An improved apparatus for crushing materials, such as coarse stone, includes a movable jaw which is reciprocated relative to a fixed jaw upon operation of a thrust transmitting drive assembly by a motor. The motor is connected with the drive assembly through a hydraulic torque transmitting and limiting assembly to prevent overloading of the crushing apparatus. The drive assembly includes a drive shaft having a circular thrust transmitting surface which is eccentrically offset and tilted relative to the central axis of the drive shaft. A second circular thrust transmitting surface is disposed on the movable jaw. A thrust transmitting sleeve is disposed between the two circular thrust transmitting surfaces and has circular surfaces which are disposed in continuous abutting engagement with the two thrust transmitting surfaces. Upon rotation of the drive shaft, the eccentric and angled thrust transmitting surface on the drive shaft causes the thrust transmitting sleeve to move as a conical pendulum to effect reciprocation of the movable jaw. The drive shaft is movable axially to compensate for wear of the jaws and to vary the size of an outlet opening through which the crushed material passes.
Inventors
- 👤 Bertil Alfons Falk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:33
CPC Classifications
B; B02; B02C; B02C1/00; B02C1/02; B02C1/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
274 words
An apparatus for crushing materials, said apparatus comprising first and second jaws for engaging the materials, means for supporting said first jaw for movement relative to said second jaw, and drive means for moving said first jaw relative to said sEcond jaw, said drive means including a drive shaft rotatable about its central axis, a first circular thrust surface connected with said drive shaft, a second circular thrust surface connected with said first jaw, a thrust member disposed between said first and second thrust surfaces, a third circular thrust surface connected with said thrust member and disposed in continuous abutting engagement with said first circular thrust surface along at least an annular area of contact which circumscribes a central axis of said first circular thrust surface, a fourth circular thrust surface connected with said thrust member and disposed in continuous abutting engagement with said second circular thrust surface along at least an annular area of contact which circumscribes a central axis of said second circular thrust surface, means for supporting said drive shaft for rotation about its central axis, the central axis of said first thrust surface extending at an acute angle relative to the central axis of said drive shaft and being offset from the central axis of said drive shaft so that said first surface is excentrically disposed relative to said drive shaft and is moved along a circular path having a central axis coincident with the central axis of said drive shaft upon rotation of said drive shaft, and motor means for moving said drive shaft to effect a transmittal of thrust forces between said drive shaft and said first jaw.
Claim 2
Independent Claim
274 words
An apparatus for crushing materials, said apparatus comprising first and second jaws for engaging the materials, means for supporting said first jaw for movement relative to said second jaw, and drive means for moving said first jaw relative to said sEcond jaw, said drive means including a drive shaft rotatable about its central axis, a first circular thrust surface connected with said drive shaft, a second circular thrust surface connected with said first jaw, a thrust member disposed between said first and second thrust surfaces, a third circular thrust surface connected with said thrust member and disposed in continuous abutting engagement with said first circular thrust surface along at least an annular area of contact which circumscribes a central axis of said first circular thrust surface, a fourth circular thrust surface connected with said thrust member and disposed in continuous abutting engagement with said second circular thrust surface along at least an annular area of contact which circumscribes a central axis of said second circular thrust surface, means for supporting said drive shaft for rotation about its central axis, the central axis of said first thrust surface extending at an acute angle relative to the central axis of said drive shaft and being offset from the central axis of said drive shaft so that said first surface is excentrically disposed relative to said drive shaft and is moved along a circular path having a central axis coincident with the central axis of said drive shaft upon rotation of said drive shaft, and motor means for moving said drive shaft to effect a transmittal of thrust forces between said drive shaft and said first jaw.
Claim 3
Dependent Claim
32 words
An apparatus as set forth in claim 1 wherein said first and second thrust surfaces have a convex spherical configuration and said third and fourth thrust surfaces have a concave spherical configuration.
Claim 4
Dependent Claim
38 words
An apparatus as set forth in claim 1 wherein said first and second circular thrust surfaces have central axes which extend at an acute angle relative to each other and to the central axis of said drive shaft.
Claim 5
Dependent Claim
67 words
An apparatus as set forth in claim 1 wherein said first thrust surface has a diametral axis disposed in a first plane extending perpendicular to the central axis of said first thrust surface, and said second thrust surface has a diametral axis disposed in a second plane extending perpendicular to the central axis of said second thrust surface and at an acute angle to said first plane.
Claim 6
Dependent Claim
54 words
An apparatus as set forth in claim 1 further including means for supporting said drive shaft for rotation about its central axis, and torque transmitting and limiting means for transmitting torque from said motor means to said drive shaft and for limiting the torque transmitted to said drive shaft to a predetermined maximum torque.
Claim 7
Independent Claim
226 words
An apparatus for crushing materials, said apparatus comprising first and second jaws for engaging the materials, means for supporting said first jaw for movement relative to said second jaw, and drive means for moving said first jaw relative to said second jaw, said drive means including a drive shaft rotatable about its central axis, a first circular thrust surface connected with said drive shaft, a second circular thrust surface connected with said first jaw, said first and second circular thrust surfaces comprising convex surfaces, the central axis of said first thrust surface being offset relative to the central axis of said driving shaft so that said first surface is excentrically disposed relative to said drive shaft and is moved along a circular path having a central axis coincident with the central axis of said drive shaft upon rotation of said drive shaft, a thrust member disposed between said first and second thrust surfaces, said thrust member having circular end thrust surfaces, said circular end thrust surfaces being concave surfaces which matingly engage said first and second circular thrust surfaces, said first and second circular thrust surfaces having central axes which extend at acute angles relative to the central axis of said drive shaft, and motor means for moving said drive shaft to effect a transmittal of thrust forces between said drive shaft and said first jaw.
Claim 8
Independent Claim
226 words
An apparatus for crushing materials, said apparatus comprising first and second jaws for engaging the materials, means for supporting said first jaw for movement relative to said second jaw, and drive means for moving said first jaw relative to said second jaw, said drive means including a drive shaft rotatable about its central axis, a first circular thrust surface connected with said drive shaft, a second circular thrust surface connected with said first jaw, said first and second circular thrust surfaces comprising convex surfaces, the central axis of said first thrust surface being offset relative to the central axis of said driving shaft so that said first surface is excentrically disposed relative to said drive shaft and is moved along a circular path having a central axis coincident with the central axis of said drive shaft upon rotation of said drive shaft, a thrust member disposed between said first and second thrust surfaces, said thrust member having circular end thrust surfaces, said circular end thrust surfaces being concave surfaces which matingly engage said first and second circular thrust surfaces, said first and second circular thrust surfaces having central axes which extend at acute angles relative to the central axis of said drive shaft, and motor means for moving said drive shaft to effect a transmittal of thrust forces between said drive shaft and said first jaw.
Claim 9
Dependent Claim
34 words
An apparatus as set fOrth in claim 6 wherein the diameter of said thrust member is greater than the distance between the innermost portions of the two concave end surfaces of said thrust member.
Claim 10
Dependent Claim
63 words
An apparatus as set forth in claim 6 wherein said first and second jaws cooperate to at least partially define an opening through which crushed materials pass, said apparatus further including means for moving said drive axially relative to at least one of said jaws to compensate for wear of said jaws and to enable the size of said opening to be adjusted.
Claim 11
Dependent Claim
40 words
An apparatus as set forth in claim 8 wherein said torque transmitting and limiting means includes telescopic coupling means for transmitting torque to said drive member when said drive member is in any one of a plurality of axial positions.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |