Seawater hydraulic rotary impact tool

Details Seawater hydraulic rotary impact tool Seawater hydraulic rotary impact tool

1990-03-30

1990-12-18

Watts, Douglas D.

Tool driving or impacting

Advance causing or controlling means

Motor causes or controls advance

4152121, B23Q 500

Patent

active

049779664

ABSTRACT:
This invention pertains to a rotary impact tool which utilizes pressurized eawater as the working fluid. When an operator engages a trigger on a novel control handle and valve assembly, pressurized seawater enters the rotary impact tool through the control handle and valve assembly and a reversing valve into a seawater powered vane motor. The shaft of the seawater powered motor, is coupled to a twin hammer impact mechanism by a novel coupling assembly with rotation of the vane motor driving the impact mechanism which translates vane motor power into impact torque. The impact mechanism is, in turn, sealed within a cavity in the front portion of the housing of rotary impact tool with lubrication and cooling of the impact mechanism being provided by a water soluble oil based lubricant which fills the cavity.

REFERENCES:
patent: 3468385 (1969-09-01), Penza
patent: 3661217 (1972-05-01), Maurer
patent: 3695367 (1972-10-01), Catterfeld et al.
patent: 4376620 (1983-03-01), Colston
patent: 4526239 (1985-07-01), Kaneda et al.
patent: 4558539 (1985-12-01), Hansson

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