Actuator control device

Motors: expansible chamber type – With motive fluid valve – Relatively movable serial valves

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C091S445000

Reexamination Certificate

active

07913612

ABSTRACT:
In an actuator control device that controls an expansion/contraction operation of a hydraulic cylinder, when a main spool52is switched to a discharge position for discharging working fluid in the hydraulic cylinder, a back pressure chamber7communicates with a tank passage13via a first port14, thereby opening an operate check valve51, and as a result, the working fluid in the hydraulic cylinder flows into a return passage4from an actuator port1and into a pilot chamber20through a second port15. A pilot spool53is maintained in a balanced position by the pressure of the pilot chamber20, which is caused to act by a front-rear differential pressure of a control throttle25, and the biasing force of a spring22housed in a spring chamber21, and therefore the opening area of the first port14is controlled to and maintained at a fixed level.

REFERENCES:
patent: 4955283 (1990-09-01), Hidaka et al.
patent: 5048395 (1991-09-01), Ohshima
patent: 5065664 (1991-11-01), Ohta et al.
patent: 6371006 (2002-04-01), Goto et al.
patent: 19961294 (2001-06-01), None
patent: 2-266103 (1990-10-01), None
patent: 6-45682 (1994-11-01), None
patent: 2001-200805 (2001-07-01), None
patent: 2002-321896 (2002-11-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Actuator control device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Actuator control device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Actuator control device will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2773155

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.