HYDRAULICALLY-ACTUATED RECIPROCATING DEVICE

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申请(专利)号： ZA19750007499

专利号： ZA757499B 主分类号： B25D

申请权利人： REYROLLE

HYDRAULICS LIMITED; BOART

INTERNATIONAL LIMITED

公开国代码： ZA 优先权国家： GB

摘要：

1526048 Hydraulic percussive tool RHL HYDRAULICS Ltd and BOART

INTERNATIONAL Ltd 28 Nov 1975 [29 Nov 1974] 51873/74 Heading B4C An hydraulic percussive tool comprises a double-acting piston 60, a control valve 35, an hydraulic accumulator 23, the

piston having recessed portions which co-operate with ports 50-52 in the cylinder which in turn lead to an auxiliary valve 83 which provides a restriction such that a delay is produced which allows the

hydraulic accumulator to store energy to propel the piston in its driving stroke. A ratchet drive is provided to rotate the piston and this intermittently rotates the drill steel through a splined drive. A bore is provided through the piston and drill

申请日： 1975-11-28 公开公告日： 1976-11-24

分类号： B25D

发明设计人： BRIAN MOFFETT;

DENIS MICHAEL FEWSTER;

JOHN GRAHAM DAVIES;

DENIS MICHAEL FEWSTER; DAVIES JOHN GRAHAM;

JOHN GRAHAM DAVIES 申请国代码： ZA

优先权： 19751128 GB

5187374

摘要附图：

steel to flush the bore hole. The auxiliary valve 83 is controlled by a cam 81 rotatable by a handle 78 against the action of a spring 83a. 主权项：

权利要求说明书