Tool driving or impacting – Drive controlled by relative axial movement of tool – Drive motor controlled
Patent
1995-11-27
1997-02-25
Hail, III, Joseph J.
Tool driving or impacting
Drive controlled by relative axial movement of tool
Drive motor controlled
173 62, 173170, 173206, B25D 918, B25D 904
Patent
active
056051972
ABSTRACT:
A unitary valve assembly for a fluid-activated, percussive paving breaker includes a valve chest having an outer sidewall forming an internal valve chamber, a sidewall within the internal chamber forming a valve bore, a reciprocal valve within the valve bore and a bottom plate permanently fastened to the outer sidewall. The inner sidewall forms a first annular, upstanding sealing seat for the valve, and the bottom plate forms a second annular, upstanding sealing seat for the valve. Passageways through the valve assembly are positioned so as to connect with high and low pressure chambers of a paving breaker, when the valve assembly is inserted into the paving breaker. For weight reduction, the valve assembly is made of acetal resin.
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Barker Scott
Bodell Steven W.
Chang Ted C.
Diesel Robert M.
Kimberlin Robert R.
Hail III Joseph J.
Ingersoll-Rand Company
Selko John J.
Stelacone Jay A.
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