On/off circuit for a hydraulic system

Fluid handling – Self-proportioning or correlating systems – Self-controlled branched flow systems

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

13711523, 137509, 137869, 137885, 251 25, F16K 3114

Patent

active

057586837

ABSTRACT:
An on/off, protective circuit has a pressure line with an inlet for connection to a pressure source and an outlet for connection to the pressure port of a hydraulic system, such as a reciprocating conveyor. A relief valve is spring biased into a closed position and openable by pressure in the pressure line to short circuit pressure from the pressure line to a return line when an on/off valve is in an off position. The spring biasing of the relief valve causes residual pressure in the pressure line. To prevent communication of the residual pressure out through the pressure outlet and into the hydraulic system and thereby prevent creeping movement in the system, a check valve is provided in the pressure line downstream of the relief valve. The check valve has a valve plug positioned to be closed by pressure in the pressure line. The check valve also has a pilot chamber which is supplied with pressure when the on/off valve is in an on position to open the check valve and allow pressure to be supplied to the hydraulic system. When the on/off valve is in its off position, the pilot chamber of the check valve is connected to return to allow the residual pressure in the pressure line and a biasing spring to maintain the check valve closed.

REFERENCES:
patent: 3311130 (1967-03-01), Caldwell
patent: 3590868 (1971-07-01), Pontiggia
patent: 5375619 (1994-12-01), Foster
patent: 5427229 (1995-06-01), Foster

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

On/off circuit for a hydraulic system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with On/off circuit for a hydraulic system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On/off circuit for a hydraulic system will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1450324

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