KINGSLEY J EVARTS
Vehicle Board in Pittsburgh, PA

5474138, Dec 12, 1995

Dec 8, 1993

8/164063

Kingsley S. Evarts - Pittsburgh PA

J & M Hydraulics, Inc. - Pittsburgh PA

B23Q 5033

173 4

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.

5529132, Jun 25, 1996

Jun 7, 1995

8/474758

Kingsley S. Evarts - Pittsburgh PA

J & M Hydraulic Systems, Inc. - Pittsburgh PA

B23Q 5033

173 1

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.

7854571, Dec 21, 2010

Jul 20, 2006

11/490399

Kingsley S. Evarts - Pittsburgh PA, US

American Piledriving Equipment, Inc. - Kent WA

E21D 7/00

405232, 405231, 405274

A pile driving system comprising an engaging system comprising a suspension system, a vibratory system, and first and second clamp assemblies. The primary housing is operatively supported by an arm assembly of a support system. The suspension system is configured to resiliently oppose movement of a secondary housing within a limited range of movement relative to a primary housing. The vibratory system is rigidly connected to the secondary housing. The first and second clamp to assemblies are supported by the secondary housing. In a first mode, the first clamp assembly rigidly connects the secondary housing to the pile, and in a second mode the second clamp assembly rigidly connects the secondary housing to the pile. The pile driving system drives the pile using a driving force generated by the support system and/or a vibrational force generated by the vibratory system.