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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||137/269 ; 251/88 ; 251/333 ; 251/357|
|발명자 / 주소||
|출원인 / 주소||
|인용정보||피인용 횟수 : 2 인용 특허 : 0|
A straight compression valve is disclosed in which shutoff of flow of fluid is effected between surfaces of plastic material, but in which a washer of non-metallic material may be employed under certain conditions. When the washer is not used, the design of the sealing surfaces is such as to obtain a highly effective shutoff with a minimum of closing pressure, while avoiding breakage of parts of the valve adjacent the sealing surfaces. Means are provided for controlling the movement of the valve stem to prevent breakage of the valve bonnet and other part...
In a valve of the character described, a valve body, a valve stem mounted in said body for reciprocal movement thereIn, said stem being of cylindrical configuration and terminating at its lower end in a flat surface perpendicular to the axis of said stem, an internally threaded metallic element frictionally secured within the lower central portion of said stem, a washer of non-metallic material disposed in contact with said flat surface, and a screw for securing said washer to said flat surface, said screw being threadedly secured to said element.