APPARATUS FOR CONTROLLING LIQUID SUPPLY Russian patent published in 2002 - IPC

FIELD: systems for controlling liquid feed to servomechanisms. SUBSTANCE: apparatus includes sleeve arranged in housing between duct for controlled feed of liquid and cavity for draining unit. Sleeve has radial opening connected with liquid pressure source and through axial opening having at side of above mentioned cavity communicated with drain, lengthwise grooves of the same length with flat end face. Slide valve with support necking portions is arranged in axial opening of sleeve. Between support necking portions slide valve has through radial openings that cross axial opening of slide valve open at side of duct for controlled supply of liquid. At opposite side of slide valve there is rod that may perform limited motion relative to control organ spring- loaded relative to slide valve and sleeve. EFFECT: enhanced safety of servomechanism operation. 4 cl, 2 dwg