Title:
PERCUSSION DEVICE
Document Type and Number:
WIPO Patent Application WO/1987/003925
Kind Code:
A1
Abstract:
A percussion device comprising a casing (1) with a movable striker (2) connected with an actuating cylinder (6) in which is mounted a shank (4) of the striker (2) provided with a clamping mechanism (14) and with an actuator consisting of a hydraulic cylinder (8). The device is provided with a control unit having a valve element (18) for controlling a distributor (19). The element (18) has a casing (22) and a valve (23) able to occupy in the casing (22) two positions and forming two chambers (25, 26) interconnected through a throttle means (24). The chamber (25) is permanently connected to a discharge main (21) whereas the chamber (26) is periodically connected to the cavity of the hydraulic cylinder (8). The valve (23) is spring-loaded in relation to the casing (22) on the side of the chamber (25) thereby occupying its initial position.
Inventors:
FADEEV PETR YAKOVLEVICH (SU)
FADEEV VLADIMIR YAKOVLEVICH (SU)
KOROBKOV VLADLEN VIKTOROVICH (SU)
KULAGIN RIM ASMANOVICH (SU)
ERMILOV NIKOLAI PETROVICH (SU)
FADEEV VLADIMIR YAKOVLEVICH (SU)
KOROBKOV VLADLEN VIKTOROVICH (SU)
KULAGIN RIM ASMANOVICH (SU)
ERMILOV NIKOLAI PETROVICH (SU)
Application Number:
PCT/SU1985/000101
Publication Date:
July 02, 1987
Filing Date:
December 23, 1985
Export Citation:
Assignee:
SP K BJURO GIDROIMPULSNOI T (SU)
INST GIDRODINAMIKI SIBIRSKOGO (SU)
INST GIDRODINAMIKI SIBIRSKOGO (SU)
International Classes:
B25D9/12; B25D9/04; B25D9/14; B25D9/20; E21B1/26; E21B1/30; (IPC1-7): E21C3/00
Foreign References:
| US4343368A | 1982-08-10 | |||
| SU979628A1 | 1982-12-07 | |||
| SU945412A2 | 1982-07-23 |
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