Hydraulic control arrangement for an infinitely variable transmi

Details Hydraulic control arrangement for an infinitely variable transmi Hydraulic control arrangement for an infinitely variable transmi

1987-10-26

1989-05-16

Freeh, William L.

Pumps

Condition responsive control of drive transmission or pump...

Disconnectable drive element

741905, F04B 4900, F04B 4908

Patent

active

048305782

ABSTRACT:
A hydraulic speed control arrangement for an infinitely variable transmission which is coupled to an engine and adapted to drive auxiliary equipment including a hydraulic fluid displacement pump includes a spool valve provided with an inlet cavity at one end of the valve spool in the valve body and connected to the hydraulic fluid displacement pump and has a spring disposed at the opposite end and biasing the valve spool against the pressure of the fluid in the inlet cavity, whereby the valve spool is adapted to control the flow of pressurized fluid from the inlet cavity to the transmission ratio control mechanism of the infinitely variable transmission in such a manner that the output shaft speed of the transmission is maintained essentially at a predetermined value. The valve spool had a face portion at its one end provided with a flow orifice structure at its circumference and, further there is a pressuzized fluid cavity disposed adjacent the valve spool face portion so as to control the fluid flow through the orifice structure depending on the position of the face portion which for some applications is in communication with the area of the valve at the other end of the valve spool and the fluid cavity is connected to a pressurized hydraulic fluid user to supply thereto the pressurized fluid needed thereby.

REFERENCES:
patent: 2599680 (1952-06-01), Weeks
patent: 2905026 (1959-09-01), Oeheli
patent: 4056989 (1977-11-01), Shaffer
patent: 4170438 (1979-10-01), Kondo
patent: 4173152 (1979-11-01), Kondo
patent: 4444068 (1984-04-01), Kraus
patent: 4526051 (1985-07-01), Kraus

Affiliated with

Also associated with

Rating

Hydraulic control arrangement for an infinitely variable transmi 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 control arrangement for an infinitely variable transmi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic control arrangement for an infinitely variable transmi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2319187