Joseph Snitgen

54352282, Jul 25, 1995

Oct 11, 1994

8/320753

Joseph D. Snitgen - Beverly Hills MI

F15B 1108

91444

A fluid operated device has a high pressure fluid cylinder, a low pressure fluid cylinder and a plurality of valves which operate to fluidically connect the two cylinders to provide a compound fluidic device. The device utilizes the exhaust of the high pressure cylinder as input to the low pressure cylinder thereby increasing the amount of work obtained from the pressurized fluid. In the preferred embodiment, the fluid operated device is connected to a compressing cylinder which, through operation of the fluid operated device, increases the fluid pressure of a working fluid. The plurality of valves includes a pair of two-way valves and two quick exhaust valves to increase the cycle speed of the fluid operated device.

53536835, Oct 11, 1994

Jul 20, 1993

8/095159

Joseph D. Snitgen - Beverly Hills MI

F15B 1108

91444

A fluid operated device has a high pressure fluid cylinder, a low pressure fluid cylinder and a plurality of control valves which operate to fluidically connect the two cylinders to provide a compound fluidic device. The device utilizes the exhaust of the high pressure cylinder as input to the low pressure cylinder thereby increasing the amount of work obtained from the pressurized fluid. In the preferred embodiment, the fluid operated device is connected to a compressing cylinder which, through operation of the fluid operated device, increases the fluid pressure of a working fluid.

44399863, Apr 3, 1984

Jan 23, 1981

6/228156

Joseph D. Snitgen - Birmingham MI

B60T 1300

605471

There is disclosed an air operated demand only hydraulic power unit for supplying hydraulic fluid under presure to one or more hydraulic working motors, comprising an extensible pneumatic power motor including an extensible power transmitting member, an extensible hydraulic slave motor including an extensible slave member powered by said power transmitting member, said slave motor being connected to each said hydraulic working motor to power same, valving for controlling the supply of air and oil to said power and slave motors, and a reset valve for insuring full volume cycling of said slave member in said slave motor. In one embodiment the reset is indicated by sensing the various pressure changes after all working motors are extended and then valving leftover oil to a reservoir. A second embodiment accomplishes the reset on a time delay basis. There is also disclosed an optional intensifier for two-stage operation of said working motors and an optional intensifier for the retract stroke of said power unit to insure full retraction of the hydraulic working motors if so desired.

44558287, Jun 26, 1984

Sep 30, 1981

6/307232

Joseph D. Snitgen - Birmingham MI

B60T 1300

605471

A maximum displacement, reciprocating air operated demand only hydraulic power unit for supplying hydraulic fluid under pressure to one or more hydraulic motors, comprising a pneumatic power cylinder having a power piston therein, a hydraulic slave cylinder having a slave piston therein powered by said power piston, said slave cylinder being connected to each said hydraulic motor to power same, a valve mechanism for controlling the supply of air and oil to said power and slave cylinders, a mechanism to control the valve mechanism to operate the unit in a steady reciprocating motion, and an intensifier for two stage operation of said motors in either operating direction of the unit. An accumulator may also be included to supply fluid when the unit changes direction.