E - Fixed Constructions – 21 – C
Patent
E - Fixed Constructions
21
C
254/115
E21C 27/00 (2006.01) B28D 1/00 (2006.01) E21C 37/04 (2006.01)
Patent
CA 1096849
TITLE OF THE INVENTION Rock Splitting Attachment for a Breaking Hammer ABSTRACT OF THE INVENTION A rock splitting attachment for a breaking hammer comprising a primary shaft and an elongated primary wedge assembly that is telescopically attached to the primary shaft. The primary shaft has a plurality of principal wedge surfaces on its outer surface adjacent its bottom end. The structure for telescopically at- taching the primary shaft to the elongated primary wedge assem- bly comprises a bore in the primary shaft extending axially inwardly from its bottom end and a secondary shaft that forms a part of the elongated primary wedge assembly. The width of the secondary shaft is smaller than the width of the bore so that it may be telescopically received therein. The secondary shaft has an external groove extending axially along a substantial portion of its length. A set screw is threadably seated in the primary shaft so that it extends radially inwardly far enough into the primary shaft that it extends into the external groove of the secondary shaft. The external groove is closed at its top end to prevent the secondary shaft from being pulled out of the bore of the primary shaft. The secondary shaft has a plur- ality of arms extending laterally from its lower end. The primary wedge assembly has a plurality of leg members each hav- ing a laterally oriented bore adjacent its lower end and each has one of the laterally extending arms of the secondary shaft received in its bore. The leg members have principal wedge surfaces on their inwardly facing sides.
326185
Kirby Eades Gale Baker
Nieder Charles E.
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