Hydraulic impulse tool with enhanced fluid seal

Details Hydraulic impulse tool with enhanced fluid seal Hydraulic impulse tool with enhanced fluid seal

1995-09-28

1997-03-18

Smith, Scott A.

Tool driving or impacting

Processes

173 935, B25B 1900

Patent

active

056114044

ABSTRACT:
An impulse tool (10) including an impulse generator (19, 119) utilizes an enhanced seal to reduce leakage of hydraulic fluid. The annular clearance in the pressure plate (24, 124) is sealed around the spindle (30, 130) with a resilient seal (38, 138). A primary passage (40, 140) through the pressure plate is provided to compensate for expansion of the fluid. The use of the primary passage (40, 140), which is not susceptible to enlargement due to wear, minimizes pressure peaks in the accumulator reservoir (42, 142), and results in less leakage.

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Patent Cooperative Treaty Search Report, PCT/US96/12879 dated Sep. 25, 1996 .

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