Hydraulic control circuit for pile driver

Details Hydraulic control circuit for pile driver Hydraulic control circuit for pile driver

1995-06-07

1996-06-25

Smith, Scott A.

Tool driving or impacting

Processes

173 4, 173 13, 173115, 173152, 91268, 91397, 91403, B23Q 5033

Patent

active

055291325

ABSTRACT:
A pile driver arrangement including a reciprocal impact member connected to a piston rod which is also connected to a reciprocal piston located in a hydraulic cylinder having a lower rod end and an upper blind end. A hydraulic fluid tank and a pump for supplying hydraulic fluid from the tank to the lower rod end of the hydraulic cylinder to lift the piston and the impact member. A first hydraulic fluid conduit connecting the upper blind end of the hydraulic cylinder and the lower end of the hydraulic cylinder and a check valve to prevent the flow of hydraulic fluid from the lower end to the upper end of the hydraulic cylinder. A second hydraulic fluid conduit connecting the pump and the lower end of the hydraulic cylinder and a control valve in the second conduit for controlling the flow of hydraulic fluid from the pump to the lower end of the hydraulic cylinder. A third hydraulic fluid conduit connecting the pump to an adjustable trip valve for adjusting the position of the control valve to control the flow of hydraulic fluid from the pump to the lower end of the hydraulic cylinder. A fourth hydraulic fluid conduit connecting the trip valve and the control valve.

REFERENCES:
patent: 3333646 (1967-08-01), Hoen et al.
patent: 3381764 (1968-05-01), Peterson et al.
patent: 4050526 (1977-09-01), Deike
patent: 4429751 (1984-02-01), Jackson et al.
patent: 5168937 (1992-12-01), Hamner

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