Title:
【発明の名称】クロージャー
Document Type and Number:
Japanese Patent JPH04507281
Kind Code:
A
Abstract:
PCT No. PCT/GB90/01297 Sec. 371 Date Feb. 14, 1992 Sec. 102(e) Date Feb. 14, 1992 PCT Filed Aug. 16, 1990 PCT Pub. No. WO91/02914 PCT Pub. Date Mar. 7, 1991.A stop valve assembly comprises two closure members one for stopping substantive gas or liquid flow and the other to prevent leakage along a spindle section 33. Each member possesses a closure element in the form of a rigid disc-like member (9 or 34) of accurately predetermined thickness lying in a recess (1 or 3) formed round the end opening of a duct or around the spindle section and having exactly the same depth as the thickness of the disc. Over the disc outer surface 11, and the end face around the recess is located a flat annular deformable seal member (14, 64); this can be secured at in relation to the disc member, so as to travel with the disc member 9 as a stop valve, or can be secured against the said face around the recess so as to define an antileakage spindle seal. Since no deformed seal is used and since no packing is used in the screw spindle mechanism, high actuating force is unnecessary. The assembly can be operated with a minimum of force to maintain pressures of hundreds or even thousands of pounds per square inch.
Inventors:
Tabata Bai, Seed Hassan
Application Number:
JP51149090A
Publication Date:
December 17, 1992
Filing Date:
August 16, 1990
Export Citation:
Assignee:
Tabata Bai, Seed Hassan
International Classes:
F16K1/44; F16K41/00; (IPC1-7): F16K1/44
Attorney, Agent or Firm:
Seiji Yanagida (1 person outside)