Impact tool with hydraulic cocking mechanism

Details Impact tool with hydraulic cocking mechanism Impact tool with hydraulic cocking mechanism

1978-11-30

1981-03-17

Schroeder, Werner H.

Tool driving or impacting

Impacting devices

With means to cause or control advance of hammer head

173134, 91276, B25D 908, B25D 918, F01L 1700

Patent

active

042561876

ABSTRACT:
An impact tool for mining, demolition work and the like. An energy storing device such as a coil spring, when compressed, accelerates a hammer to deliver a blow to a working tool. The hydraulic cocking mechanism has a compression chamber and a bias chamber. A shaft extends through the compression chamber and into the bias chamber. The shaft has an annular stop attached to it and reciprocally carries a compression sleeve above the annular stop. A bias member extends into the bias chamber. Input hydraulic pressure urges the bias member to press the compression sleeve into seating contact with the annular stop to define a piston. Hydraulic input pressure acting at the same time below the piston urges the shaft upward to cock the spring. At the top of the stroke, ports and passages reduce the pressure difference above and below the piston to allow the spring to force the shaft down for impact. On the downstroke, the compression sleeve and annular stop separate. Ports urge the sleeve back into sealing contact with the annular stop after impact. A resilient member cooperating with the sleeve and annular stop reduce damage to the sealing surface.

REFERENCES:
patent: 3687008 (1972-08-01), Densmone
patent: 3827507 (1974-08-01), Lance
patent: 3866690 (1975-02-01), Lance et al.
patent: 4005637 (1977-02-01), Bouyoucos et al.
patent: 4011795 (1977-03-01), Barthe et al.
patent: 4077304 (1978-03-01), Bouyoucos

Affiliated with

Also associated with

Rating

Impact tool with hydraulic cocking mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Impact tool with hydraulic cocking mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Impact tool with hydraulic cocking mechanism will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1641503