Pressure equalizing valve
First Claim
1. A pressure equalizing valve, comprising:
- a housing defining a chamber,said housing having first and second passages therethrough opening into said chamber;
a valve seat in said chamber surrounding the opening of said second passage thereinto;
a diaphragm having its periphery sealed to said housing and forming a wall of said chamber adjacent to said valve seat;
resilient means on the side of said diaphragm opposite said valve seat for urging said diaphragm against said seat with a predetermined force, to seal said second passage from said chamber, and hence from said first passage; and
an indicator mounted on said housing and having a pressure responsive portion in communication with said chamber for indicating when the air pressure therein is below a predetermined value just sufficient to overcome said predetermined force and unseal said second passage,said valve further comprising a partition dividing said chamber into first and second compartments respectively communicating with said diaphragm and said pressure responsive portion of said indicator, said partition having a permanently open third passage therethrough connecting said compartments.
0 Assignments
0 Petitions
Accused Products
Abstract
A pressure equalizing valve featuring a housing defining a chamber, the housing having first and second passages therethrough opening into the chamber; a valve seat in the chamber surrounding the opening of the second passage thereinto; a diaphragm having its periphery sealed to the housing and forming a wall of the chamber adjacent to the valve seat; resilient means on the side of the diaphragm opposite the valve seat for urging the diaphragm against the seat with a predetermined force, to seal the second passage from the chamber, and hence from the first passage; and an indicator mounted on the housing and having a pressure responsive portion in communication with the chamber for indicating when the air pressure therein is below a predetermined value just sufficient to overcome the predetermined force and unseal the second passage.
24 Citations
12 Claims
-
1. A pressure equalizing valve, comprising:
-
a housing defining a chamber, said housing having first and second passages therethrough opening into said chamber; a valve seat in said chamber surrounding the opening of said second passage thereinto; a diaphragm having its periphery sealed to said housing and forming a wall of said chamber adjacent to said valve seat; resilient means on the side of said diaphragm opposite said valve seat for urging said diaphragm against said seat with a predetermined force, to seal said second passage from said chamber, and hence from said first passage; and an indicator mounted on said housing and having a pressure responsive portion in communication with said chamber for indicating when the air pressure therein is below a predetermined value just sufficient to overcome said predetermined force and unseal said second passage, said valve further comprising a partition dividing said chamber into first and second compartments respectively communicating with said diaphragm and said pressure responsive portion of said indicator, said partition having a permanently open third passage therethrough connecting said compartments. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
Specification