公开(公告)号：US3800886A

公开(公告)日：1974-04-02

申请号：US3800886D

申请日：1972-10-24

Applicant: BAZHAL A ,  PONOMOZENRO L

Inventor： BAZHAL A ,  PONOMOZENRO L

IPC: E21B1/38 ,  B25D15/02

CPC classification number: E21C3/04

Abstract: The machine incorporates an air-operated striking piston whose body contains an air-distribution arrangement and a hammer reciprocating due to the action of compressed air so as to deliver at the end of a work stroke a blow at a drill steel arranged in the front part of the machine. Accommodated in the front part of the machine is a rotary impulse fronthead whose body contains an annular striking piston with projections and a rotary anvil with co-operative indentations and projections so arranged that their side surfaces and walls of the fronthead body form work stroke and idle stroke chambers which connect to a source of compressed air or atmosphere at regular intervals. The projections of the annular striking piston oscillate in these chambers back and forth and through an angle at a high rate due to the action of compressed air so as to deliver at the end of a work stroke a blow at the cooperative projections of the rotary anvil, causing to rotate the rotary anvil linked with the drill steel. Arranged in the front part of the fronthead body is a ratchet mechanism which assures that the rotary anvil and the drill steel rotate in only one direction.

Abstract translation: 该机器包括气动打击活塞，其主体包含空气分配装置和由于压缩空气的作用而往复运动的锤，以便在工作结束时输送在布置在前部的钻钢 的机器。