F04B 5 - Machines or pumps with differential-surface pistons

Patents for F04B 5 - Machines or pumps with differential-surface pistons (514)
03/1978
03/21/1978	US4080108 Improved lubrication pump for a torque proportioning differential
03/07/1978	US4077180 Method and apparatus for packaging fluent material
02/1978
02/28/1978	US4076465 Volumetric proportioning diluter
02/28/1978	US4076463 Wave motor
07/1977
07/26/1977	US4037996 Volumetric pump
05/1977
05/31/1977	US4026196 Device for driving a pump piston
02/1977
02/15/1977	US4008012 Double-acting pump
02/15/1977	US4008003 Valveless positive displacement pump
12/1976
12/07/1976	US3995966 Check valve for a double action pump
11/1976
11/30/1976	US3994632 Rotary engine and pump
10/1976
10/12/1976	US3985470 Dual pressure hydraulic pump
07/1976
07/20/1976	US3970415 One way valve pressure pump turbine generator station
05/1976
05/18/1976	US3957398 Wave energized pump
03/1976
03/02/1976	US3941516 Waterwell pump assembly

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