Microvalve device
First Claim
1. A microvalve device for controlling fluid flow comprising:
- a body defining a chamber having first and second ends, the first end being in communication with a source of command pressure, the second end being in communication with a source of load pressure; and
a micromachined spool disposed in the chamber between the first and second ends for sliding movement influenced by differential pressure across the micromachined spool, the micromachined spool being movable between a first position, in which allows fluid flow between the source of load pressure and a source of supply pressure, and a second position, which allows fluid flow between the source of load pressure and a pressure vent, the micromachined spool having a closed position intermediate the first position and the second position which restricts fluid flow between the source of load pressure and both the source of supply pressure and the pressure vent, wherein the micromachined spool is moveably connected to the body.
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Accused Products
Abstract
A microvalve device for controlling fluid flow includes a body defining a chamber having first and second ends. The first end is in communication with a source of command pressure. The second end in communication with a source of load pressure. A micromachined spool valve is disposed in the chamber between the first and second ends for sliding movement by differential pressure across the spool between a first position in which allows fluid flow between the source of load pressure and a source of supply pressure and a second position which allows fluid flow between the source of load pressure and a pressure vent. The spool valve has a closed position intermediate the first position and the second position which restricts fluid flow between the source of load pressure and both the source of supply pressure and the pressure vent. The spool valve is moveably connected to the body.
178 Citations
20 Claims
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1. A microvalve device for controlling fluid flow comprising:
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a body defining a chamber having first and second ends, the first end being in communication with a source of command pressure, the second end being in communication with a source of load pressure; and a micromachined spool disposed in the chamber between the first and second ends for sliding movement influenced by differential pressure across the micromachined spool, the micromachined spool being movable between a first position, in which allows fluid flow between the source of load pressure and a source of supply pressure, and a second position, which allows fluid flow between the source of load pressure and a pressure vent, the micromachined spool having a closed position intermediate the first position and the second position which restricts fluid flow between the source of load pressure and both the source of supply pressure and the pressure vent, wherein the micromachined spool is moveably connected to the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification