Pneumatic impact mechanism

Details Pneumatic impact mechanism Pneumatic impact mechanism

E - Fixed Constructions

02

D

121/17, 61/92

E02D 7/10 (2006.01) B25C 1/04 (2006.01) B25D 9/08 (2006.01) B25D 17/00 (2006.01) H01R 4/66 (2006.01)

Patent

CA 1060666

ABSTRACT OF THE DISCLOSURE A pneumatic impact mechanism for driving rod-like members having a hollow cylindrical casing with a tail portion and a front end portion. The casing accommodates a reciprocating stepped hammer piston defining in the casing, on the tail portion side, a variable volume rear end work chamber in permanent communication with a source of compress- ed air. The stepped hammer piston defines, on the side of the front end portion, a variable volume front end work chamber. The stepped hammer piston has a through-passing axial bore, and its small-diameter portion cooperates with the tail portion and has radial bores. There is provided a tubular guide member for receiving the rod-like member arranged coaxially with the stepped hammer piston and casing and se- cured to the tail portion and to the front end portion of the casing in such a manner as to cooperate with the stepped hammer piston and define therewith, with the outer periphery thereof an axial passage. A clamp for retaining rod-like member is rigidly secured to the front end portion of the casing. The front end-work chamber communicates, at regular intervals, with atmosphere through the axial passage and radial bores when the stepped hammer piston is in the rear end position and with the rear end work chamber when the stepped hammer piston is in the front end position to deliver blows to the casing under the action compressed air fed to the work chambers.

276813

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