Abstract Particularly formed telescopically mating conical elements (mantle and bowl) are disclosed for use in a cone type gyratory crusher as employed for reducing hard rock ore. Each of the conical elements includes a substantial crushing section of essentially linear taper, which has a hard metal surface layer (over 12 percent chromium and over 2.5 percent carbon) of at least 7/16-inch thickness. The two mating hard surfaces of the crusher elements (in offset concentric relationship) define an open truncated cone therebetween of variably gyrating thickness, the limits of which are substantially uniform. Above the open truncated cone, the mating elements define an enlarged, open feeding throat from which ore or other solid pieces are fed for crushing by the gyrating motion of the interior mantle element against the exterior bowl element. The relatively thick hard metal surface layers in cooperation with the linear shape of the conical crushing passage provides extended use periods for the crusher (wear being primarily abrasive) and effective crushing production.
Inventors
👤 Donald Royce Gittings
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-02 11:07
CPC Classifications
B; B02; B02C; B02C2/00; B02C2/005
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
184 words
An improved mating mantle-bowl structure for a crusher wherein a drive unit provides a gyratory movement between said mantle-bowl structure to afford a crushing action, comprising: a mantle defined as a figure of revolution and including an externally defined conical section of substantially linear external taper and an external throat portion thereabove, said mantle comprising a base metal casting with an external surface layer extending over said externally defined conical section comprising a hard metal in relation to said base metal and being of at least seven-sixteenths of an inch in thickness; and a bowl member for telescopically receiving said mantle, said bowl member including an internally defined conical section of substantially linear internal taper to mate with said externally defined conical section of said mantle, and further including an external throat portion above said internally defined conical section, said bowl member comprising a base metal casting with an internal surface layer extending over said internally defined conical section, said internal surface layer comprising a hard metal in relation to said base metal and being of at least seven-sixteenths of an inch in thickness.
Claim 2
Dependent Claim
184 words
An improved mating mantle-bowl structure for a crusher wherein a drive unit provides a gyratory movement between said mantle-bowl structure to afford a crushing action, comprising: a mantle defined as a figure of revolution and including an externally defined conical section of substantially linear external taper and an external throat portion thereabove, said mantle comprising a base metal casting with an external surface layer extending over said externally defined conical section comprising a hard metal in relation to said base metal and being of at least seven-sixteenths of an inch in thickness; and a bowl member for telescopically receiving said mantle, said bowl member including an internally defined conical section of substantially linear internal taper to mate with said externally defined conical section of said mantle, and further including an external throat portion above said internally defined conical section, said bowl member comprising a base metal casting with an internal surface layer extending over said internally defined conical section, said internal surface layer comprising a hard metal in relation to said base metal and being of at least seven-sixteenths of an inch in thickness.
Claim 3
Dependent Claim
16 words
A structure according to claim 1 wherein said layers of hard metal are arc weld deposited.
Claim 4
Dependent Claim
25 words
A structure according to claim 1 wherein said mantle and bowl members define a substantially enlarged annular feeding throat above said sections of linear taper.
Claim 5
Dependent Claim
22 words
A structure according to claim 1 wherein said surface layers comprise a plurality of layers of weld metal of different individual hardness.
Claim 6
Dependent Claim
30 words
A structure according to claim 1 wherein said surface layers comprise a hard metal component layer having a carbon content over 3 percent and a chrome content over 20 percent.
Claim 7
Dependent Claim
43 words
A structure according to claim 1 wherein said surface layers comprise a plurality of layers of weld metal of different individual hardness and include a hard metal component layer having a carbon content over 3 percent and a chrome content over 20 percent.