Patent ID: 7398793
Filing Date: 2008-07-15
Classification: A62C,G05D,Y10T

Abstract:
1. A rapidly opening pressure regulating valve comprising: (a) a main body provided with a valve seat intervening in a fluid channel communicating with an inlet and an outlet of the fluid and a single fluid guiding port to guide fluid from the center of the main body to the valve outlet; (b) a valve member being composed of: (c) a portion defining a channel for communicating the inlet with the other end side; (d) a biasing member for biasing the valve member in the opening direction; (e) a receiving member for closing a space in the main body in communicating with the channel; (f) a moving receiving portion that is interposed between the receiving member and the biasing member, the moving receiving portion being guided movably in the opening/closing direction in the main body, provided with a pressure-receiving surface for receiving a same pressure as the opening pressure-receiving surface, and generating a biasing force in the biasing member when moved to a predetermined position in the opening direction; (g) a positioning portion provided in the main body so as to stop the moving receiving portion at the predetermined position; (h) pressure-sealing means including a sealing plate that is provided so as to close the channel under a condition that the sealing plate is in communication with the channel; and (i) sealed pressure-releasing means provided in the main body, the sealed pressure-releasing means being constituted so as to supply a pressure in the channel to the opening pressure-receiving surface by breaking the sealing plate when operated, (j) wherein a pressure-receiving area for receiving a fluid pressure of the valve component that is seated in the valve seat, a pressure-receiving area of the closing pressure-receiving surface, a pressure-receiving area of the opening pressure-receiving surface, and a biasing force of the biasing member are determined so as to have a relationship in which the channel is communicated and the opening pressure-receiving surface receives a pressure in the opening direction, whereby the valve component portion is opened and a valve closing force that closes the valve component portion when a pressure in the outlet exceeds a predetermined pressure becomes larger than the biasing force, whereby the valve component portion is closed, wherein the receiving member is constituted such that in an inner circumferential surface of the receiving member, movement of the moving receiving portion is guidable in at least one of the opening and closing direction, wherein an outer circumferential surface of an upper end of the main body and the inner circumferential surface of the receiving member are threaded so as to correspond to each other, and the receiving member is constituted so as to be thread-engageable with the upper end of the main body, and wherein the receiving member and the main body have contact portions other than engaged portions, which contact portions are formed to be tapered at a position above the engaged portions.