Patent ID: 9546737
Date: 2017-01-17
CPC Classifications: F15B,F16K,Y10T

Claim:
1. A solenoid valve comprising: a housing including a longitudinal channel, a longitudinal single-acting through hole, a longitudinal double-acting through hole, a spring biased spool disposed in the channel, a lateral outlet communicating with the double-acting through hole, a hole element passing through an edge of the channel to communicate with both the double-acting through hole and the channel, a first hole open to an outer surface of the housing, a second hole open to the outer surface of the housing, a third hole open to the outer surface of the housing, a fourth hole open to the outer surface of the housing, and a fifth hole open to the outer surface of the housing wherein the second hole, the third hole, the fourth hole, and the fifth hole communicate with the channel; a switch disposed on the housing and including an axial tunnel, a shaft disposed in the tunnel, a lateral single-acting hole communicating with the tunnel, a lateral double-acting hole communicating with the tunnel, and a linking hole perpendicular to the tunnel but not communicating therewith; a pilot valve disposed on the switch; a base formed at a bottom of the housing and including an axial tunnel member open to an end, a sixth hole open to top and bottom and communicating with the tunnel member, and a seventh hole open to top and bottom and communicating with the tunnel member; and a spring biased check valve disposed at a lower opening of the housing and the base, the check valve communicating with the single-acting through hole.