System for lubricating and reciprocating a piston in a fluid-act

Details System for lubricating and reciprocating a piston in a fluid-act System for lubricating and reciprocating a piston in a fluid-act

1995-10-17

1996-12-24

Smith, Scott A.

Tool driving or impacting

Work cleansing

By motive fluid for drive motor or advance causing or...

173 73, 173138, 173170, B25D 1704

Patent

active

055866069

ABSTRACT:
A system for lubricating and reciprocating a piston in a fluid-activated, percussive paving breaker includes a unitary valve assembly positioned within a bore of a rear portion of a tool housing, the valve assembly having an oil reservoir for lubricating the piston. The valve assembly is retained in place by a combination of a throttle lever and a backhead plate bolted to the rear tool housing.

REFERENCES:
patent: 1233477 (1917-07-01), Hultquist
patent: 1947430 (1934-02-01), Demooy
patent: 2562468 (1951-07-01), Lear
patent: 2572841 (1951-10-01), Osgood et al.
patent: 4183414 (1980-01-01), Tamai et al.
patent: 5259463 (1993-11-01), Bodell et al.
patent: 5307881 (1994-05-01), Kimberlin

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