Closed center programmed valve system with load sense

Details Closed center programmed valve system with load sense Closed center programmed valve system with load sense

1979-04-30

1981-07-07

McCarthy, Edward J.

Motors: expansible chamber type

With motive fluid valve

Plural separately controlled waste passages for single...

60422, 91454, 91459, F15B 1108, F15B 1120

Patent

active

042768110

ABSTRACT:
A closed center programmed valve system having a load sense fluid source for control of the raising and lowering of load means by a raise and a lower normally closed two stage valve assembly. Each of the second stages of the valve assemblies has a poppet with a parabolic control which is dimensioned to provide substantially linear flow rate change for minimized shock when the respective valve is actuated to the valve closed state. The load sense for the load means is taken from the outlet of the raise second stage without the requirement of a separate actuated valve or land with a load sense signal being applied to the fluid source during the time the raise valve assembly is actuated to the valve open state.

REFERENCES:
patent: 3494258 (1970-02-01), Harrns
patent: 4116001 (1978-09-01), Orth
patent: 4174034 (1979-04-01), Johnson
patent: 4174614 (1979-11-01), Dezelan
patent: 4194362 (1980-03-01), Nonnenmacher
patent: 4201052 (1980-05-01), Breeden
patent: 4202250 (1980-05-01), Zeuner

Affiliated with

Also associated with

Rating

Closed center programmed valve system with load sense does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Closed center programmed valve system with load sense, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Closed center programmed valve system with load sense will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-188206