Rolling diaphragm metering valve
First Claim
1. A valve controlling fluid flow comprising:
- a. a valve body having an inlet and an outlet for fluid flow therethrough;
b. a cylindrical divider within said body, having an end and having passages for fluid flow peripherally disposed along the sides of said divider;
c. said divider dividing the valve body into an intake chamber and an outlet chamber;
d. a convoluted cylindrical elastomeric diaphragm having one edge sealingly connected adjacent to the preiphery of the closed end of the cylinder divider extending along the interior walls of the cylinder divider sealingly adjacent to the passages, being convoluted inwardly;
e. a diaphragm activating cup sealingly connected to the other end of the convoltued diaphragm forming thereby a metering chamber;
f. a flow metering orifice within said activating cup;
g. a dump means for dumping the fluid contents of the metering chamber to the exhaust chamber;
h. a biasing means biasing said actuating cup towards a maximum size of the metering chamber.
2 Assignments
0 Petitions
Accused Products
Abstract
An improved metering valve, or flush valve, incorporates a rolling diaphragm mechanism of a cylindrical elastromeric material providing a smoothly transitioning flow rate control from the full open to the full close position. The rolling diaphragm sealing means is actuated by a floating cup driven by the differential pressure between the valve fluid inlet and an intermediate actuation control chamber. The valve control is spring biased to the normally closed position and is actuated by dumping all fluid from the control chamber through a poppet mechanism which is triggered mechanically through a sealing diaphragm. Upon dumping fluid from the metering chamber, the actuating cup is compressed by the pressure of the inlet fluids to roll the diaphragm to a substantially open position. A metering orifice within the actuating cup passes fluid from the inlet at a controlled rate to the metering chamber which, by the transfer of fluids through the metering orifice, is gradually filled with fluid and expands moving the rolling diaphragm towards the sealingly closed position. The amount of fluid passed is substantially a function of the size of the metering orifice. The metering orifice has a range in sizes. The design of the valve is such that the dynamic pressures across the rolling diaphragm are essentially in balance during actuation and closure, thus the closing bias can be established with a relatively weak spring mechanism or the like.
39 Citations
7 Claims
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1. A valve controlling fluid flow comprising:
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a. a valve body having an inlet and an outlet for fluid flow therethrough; b. a cylindrical divider within said body, having an end and having passages for fluid flow peripherally disposed along the sides of said divider; c. said divider dividing the valve body into an intake chamber and an outlet chamber; d. a convoluted cylindrical elastomeric diaphragm having one edge sealingly connected adjacent to the preiphery of the closed end of the cylinder divider extending along the interior walls of the cylinder divider sealingly adjacent to the passages, being convoluted inwardly; e. a diaphragm activating cup sealingly connected to the other end of the convoltued diaphragm forming thereby a metering chamber; f. a flow metering orifice within said activating cup; g. a dump means for dumping the fluid contents of the metering chamber to the exhaust chamber; h. a biasing means biasing said actuating cup towards a maximum size of the metering chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification