E - Fixed Constructions – 21 – C
Patent
E - Fixed Constructions
21
C
262/75
E21C 25/02 (2006.01) E21D 9/10 (2006.01)
Patent
CA 1242462
ABSTRACT A machine for driving workings in hard works com- prises a movable carrier having a boom to which is se- cured a frame. An implement having a hammer piston is mounted in the frame by means of pins. The pins have support members cooperating with piston rods of shock- -absorbing means comprising cylinders. Each shock-ab- sorbing means has a space filled with a compressible fluid in which the end face of the piston rod is re- ceived, and a first and a second dashpot spaces filled with a non-compressible fluid which communicate with one another through a throttling means, The piston rod has an enlarged piston-like portion which forces the non-compressible fluid to overflow through the throttl- ing means between the first and second dashpot spaces during movement of the piston rod.
493463
Ermilov Nikolai P.
Fadeev Petr Ya.
Fadeev Vladimir Ya.
Korobkov Vladlen V.
Kulagin Rim A.
Institut Gidrodinamiki Imeni M.a. Lavrentieva Sibirskogo Otdelen
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
Spetsialnoe Konstruktorskoe Bjuro Gidroimpulsnoi Tekhniki Sibirs
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