Pumps – Motor driven – Pump within rotary working member
Patent
1992-03-23
1993-03-02
Bertsch, Richard A.
Pumps
Motor driven
Pump within rotary working member
417270, F04B 2708, F04B 3504
Patent
active
051904470
ABSTRACT:
A pumping mechanism featuring integration of a fixed-displacement radial ton pump within an electric drive motor and cooperative operation of a radially inwardly facing piston-actuating cam with a pair of opposing axially inwardly facing spool-valve actuating cams. The piston-actuating cam is effectively the inner surface of the rotating motor rotor, the pistons extending radially from a fixed central body. Consequent benefits of the integrated configuration are greater quietness, compactness, efficiency and corrosion resistance. The external motor unit provides protection, there is a damping effect, and there are fewer parts which are subject to damage or malfunction. Further reductions in noise and leakage are gained by synchronized operation, in terms of fluid pumping, of the spool-valve actuating cams and the piston-actuating cam. The piston elements can be distributed so as to foster balanced loadings, and the pump flow rate can be controlled by varying the motor's rotational speed, thus advantageously combining the hydraulic pressure balance which is characteristic of a fixed-displacement pump with the variable delivery of a variable-displacement pump.
REFERENCES:
patent: 1926444 (1933-09-01), Jones
patent: 2250947 (1941-07-01), Carpenter
patent: 2468948 (1949-05-01), Smith
patent: 2485753 (1949-10-01), Lefler et al.
patent: 2711286 (1955-06-01), McAdam
patent: 4831297 (1989-05-01), Taylor et al.
patent: 4850812 (1989-07-01), Voight
Basichas Alfred
Bertsch Richard A.
Kaiser Howard
The United States of America as represented by the Secretary of
LandOfFree
Hydraulic pump with integral electric motor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic pump with integral electric motor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic pump with integral electric motor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-123507