Patent ID: 7131629
Filing Date: 2006-11-07
Classification: B60T,F16K

Abstract:
1. An automatic-and-manual operation composite valve comprising: a valve main body into which an air is supplied and from which the air is discharged; a piston provided within the valve main body to be vertically movable by means of the air supplied or discharged and a snapping force of a spring attached to the piston; a valve body provided within the valve main body, and opened and closed by the piston; an air switch valve portion provided within the valve main body for switching air supply and air discharge; and a manual operation mechanism portion for operating the air switch valve portion, wherein the manual operation mechanism portion comprises a manual operation handle, a stem and a pair of O-rings attached to an outer periphery of the stem, closes or opens an air supply port of the air switch valve portion and opens or closes a purge port of the valve main body for purging the air within the valve main body with the pair of O-rings by a pressing or releasing operation of the manual operation handle.