Wedge arrangements and related means for mounting means,...

E - Fixed Constructions – 21 – C

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262/83

E21C 25/12 (1980.01) E21C 25/44 (1980.01)

Patent

CA 1159477

IMPROVED WEDGE ARRANGEMENTS AND RELATED MEANS FOR MOUNTING MEANS, BASE MEMBERS, AND BITS, AND COMBINATIONS THEREOF, FOR MINING, ROAD WORKING, OR EARTH MOVING MACHINERY ABSTRACT OF THE DISCLOSURE A wedge arrangement for affixing a tool mounting means onto a base member in such manner that substantially no wear occurs between the mounting means and base member. The mounting means has a tapered portion which is wedgingly received within a correspondingly tapered cavity provided in the base member, and that part of the base member which defines the tapered cavity com- pletely surrounds that part of the tapered portion which is seated therein. The mounting means is also provided with a perforation or socket to receive the shank or body portion of a cutting element which has a relatively sharp cutting point or edge provided thereon. This per- foration, when the mounting means tapered portion is located in the base member tapered cavity in accordance with this invention, will extend not only into the mounting means but also it may extend within the con- fines of the base member itself; in all instances the cutting tool shank will be brought closer to, if not within, the base member, thus making for an overall arrangement which is: (a) easy and less expensive to manufacture; (b) capable of being used in restricted areas; (c) stronger; and (d) capable of utilizing means which permit easy replacement of the cutting element. These last mentioned means may include a plunger ar- rangement, some times fluid actuated, acting through the wedged mounting means-base member combination. The wedge arrangement of this invention is 360° in scope and is such as to prevent relative movement between the mounting means and its base member. Supplemental elements, however,may also be employed in order to insure this. Portions at least of those exterior sides of the mounting means which are received within the base member cavity, regardless of the cross sectional con- figuration of the mounting means through those sides, are tapered, the interior walls of the base member cavity being correspondingly tapered.

418272

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