Patent ID: 6237634
Filing Date: 2001-05-29
Classification: F15B,F16K,Y10T

Abstract:
A supply and exhaust changeover valve for manually supplying and exhausting fluid under pressure to and from a fluid pressure apparatus, comprising:a supply body having an introduction port for fluid under pressure, a first fitting portion for connection to a supply port of said fluid pressure apparatus, and a supply passage communicating the introduction port and the first fitting portion;an exhaust body having a fluid exhaust port, a second fitting portion for connection to an exhaust port of said fluid pressure apparatus, and an exhaust passage communicating the fluid exhaust port with the second fitting portion;joining means for joining said supply body and said exhaust body;a hollow retainer provided between said supply body and said exhaust body, and configured to communicate said supply passage with said exhaust passage through an inner passageway thereof;a first valve seat provided at a midpoint position of said supply passage and a second valve seat provided in the inner passageway of said hollow retainer;a valve member positioned and configured to selectively contact with and separate from one of said first and second valve seats to alternately open and close the supply passage and the inner passageway; andoperating means for operating said valve member.