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US 3,957,309 AGranted
Apparatus for mechanically breaking up rock
OwnerHelmut Dardainventor
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OwnerHelmut Dardainventor
Estimating the term…
Apparatus for mechanically breaking up rock comprises a hydraulically operated piston-cylinder assembly, a slider wedge connected to the piston rod of the assembly and presser cheeks mounted on a tubular extension of the cylinder of the assembly for engagement with opposite sides of the slider wedge. A web extending transversely within the outer end of the tubular extension has an elongate opening through which "T"-shaped heads of the presser cheeks can be inserted into the tubular extension so that, on rotation through 90.degree. about the longitudinal axes of the presser cheeks, the heads are locked behind the edges of the elongate opening but capable of lateral movement along the opening as a result of axial movement of the slider wedge. Preferably, the lateral extremities of the T-shaped heads are seated between two pairs of semicircular shaped supporting plates which are retained within the tubular extension by the transversely extending web. The presser cheeks are resiliently clamped to the slider wedge by a C-shaped retaining spring which is rotatable within the tubular extension for alignment of the gap with the elongate opening in the transverse web to allow removal of the heads of the presser cheeks. Alternatively, the presser cheeks are clamped by the cranked ends of spring-loaded pins which may be rotated so that the cranked ends clear the presser cheeks.
Apparatus for mechanically breaking up rock comprising a hydraulic piston-cylinder assembly, a tubular extension projecting from the cylinder of the piston-cylinder assembly, a web extending transversely within the outer end of the tubular extension to define an elongate opening, a piston rod extending from the piston of the piston-cylinder assembly, a slider wedge which has convergently inclined bearing surfaces and is reciprocable within the tubular extension by the piston rod said slider wedge being releasably and pivotably connected to said piston rod, presser cheeks which are releasably mounted for lateral movement within the tubular extension and have bearing surfaces for complementary engagement with the convergently inclined bearing surfaces on opposite sides of the slider wedge, and head portions of the presser cheeks for insertion in the opening defined by the transverse web of the tubular extension at a predetermined orientation of said cheeks about their axes and upon rotation of the presser cheeks about their axes the heads are locked within the tubular extension behind the transverse web.
Dependencies are inferred from the claim text.