Hydraulic hammer having improved seal ring

Details Hydraulic hammer having improved seal ring Hydraulic hammer having improved seal ring

1998-06-10

2000-09-19

Smith, Scott A.

Tool driving or impacting

Impacting devices

With means to reciprocate tool

173128, 173138, 173200, 173213, B25D 900

Patent

active

061197955

ABSTRACT:
A hydraulic hammer having an improved seal ring contacting with a piston. The hydraulic hammer having a cylinder having an inner surface where a fluid groove connected to a passage for passing the fluid is formed, a piston installed in the cylinder to be elevated, and a first seal ring for guiding the elevation of the piston, installed in an inner surface of the cylinder under the fluid groove and contacting with the piston, includes one or more second seal rings having one or more grooves or holes for passing the fluid, installed on the fluid groove and/or between the fluid groove and the first seal ring. Accordingly, the length of use before replacement of the seal ring installed between the piston and the cylinder can be extended, to thereby reduce the cost for operating the hydraulic hammer.

REFERENCES:
patent: 4109734 (1978-08-01), Montabert
patent: 4508017 (1985-04-01), Montabert
patent: 5129466 (1992-07-01), Bartels et al.
patent: 5370194 (1994-12-01), Anderson

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