Pumps – Condition responsive control of drive transmission or pump... – Adjustable cam or linkage
Patent
1997-10-17
2000-02-29
Thorpe, Timothy S.
Pumps
Condition responsive control of drive transmission or pump...
Adjustable cam or linkage
60444, F04B 126
Patent
active
060301821
ABSTRACT:
A variable displacement pump assembly (11) of the type including a tiltable swashplate (29) to vary the pump displacement. The assembly includes a main control valve (43) having a housing (44). The assembly includes an input section (65) disposed between the valve housing (44) and the pump housing (61). The input section (65) defines a cylinder bore (77, 79) in which a piston member (81) is disposed and is connected by a mechanical input (59) to a valve spool (51) of the main control valve. The piston defines first (87) and second (89) piston chambers and a solenoid valve (105) is responsive to a remote electrical input signal (111, 113) to control the fluid pressure in the piston chambers, and therefore, the position of the valve spool (51). The mechanical linkage (91,99,101) between the piston (81), the valve spool (51) and the swashplate (29) is totally enclosed within the valve housing (44) and the body portion (67) of the input section, thus eliminating the need for remote mechanical control cables, and improving the reliability of the control system. The control of the present invention thus enables the vehicle operator to vary pump displacement by either a manual input to the main control valve (43) or by varying the electrical input signal (111, 113).
REFERENCES:
patent: Re31657 (1984-09-01), Caruso
patent: 3152445 (1964-10-01), Weisenbach
patent: 3463087 (1969-08-01), Grant
patent: 3817150 (1974-06-01), Cox
patent: 4050247 (1977-09-01), Connett
patent: 4158529 (1979-06-01), Nonnemacher et al.
patent: 4183419 (1980-01-01), Henn et al.
patent: 4204457 (1980-05-01), Cyrot
patent: 4274257 (1981-06-01), Koch, Jr. et al.
patent: 4463559 (1984-08-01), Holdenried
Eaton Corporation
Kasper L. J.
Thorpe Timothy S.
Tyler Cheryl J.
LandOfFree
Variable displacement pump and optional manual or remote control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable displacement pump and optional manual or remote control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable displacement pump and optional manual or remote control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-676988