Variable pressure valve apparatus
First Claim
Patent Images
1. A variable pressure valve apparatus comprising:
- a case having a fluid inlet port and a fluid discharge port;
a valve element for closing the fluid inlet port;
a spring member disposed in the case for biasing the valve element to close the fluid inlet port;
a cam wheel for undergoing rotation to deform the spring member and thereby vary a biasing force applied to the valve element by the spring member;
a feed ratchet disposed in the case for undergoing movement to rotate the cam wheel; and
moving means for undergoing extension movement to move the feed ratchet to thereby rotate the cam wheel to deform the spring member.
1 Assignment
0 Petitions
Accused Products
Abstract
A variable pressure valve apparatus has a case having a fluid inlet port and a fluid discharge port, a valve element for closing the fluid inlet port, a spring member disposed in the case for biasing the valve element to close the fluid inlet port, and a cam wheel for undergoing rotation to deform the spring member and thereby vary a biasing force applied to the valve element by the spring member. A feed ratchet is disposed in the case for undergoing movement to rotate the cam wheel. A shape memory alloy or a piezoelectric element undergoes extension movement to move the feed ratchet to thereby rotate the cam wheel to deform the spring member.
106 Citations
28 Claims
-
1. A variable pressure valve apparatus comprising:
- a case having a fluid inlet port and a fluid discharge port;
a valve element for closing the fluid inlet port;
a spring member disposed in the case for biasing the valve element to close the fluid inlet port;
a cam wheel for undergoing rotation to deform the spring member and thereby vary a biasing force applied to the valve element by the spring member;
a feed ratchet disposed in the case for undergoing movement to rotate the cam wheel; and
moving means for undergoing extension movement to move the feed ratchet to thereby rotate the cam wheel to deform the spring member. - View Dependent Claims (2, 3, 4, 5, 6)
- a case having a fluid inlet port and a fluid discharge port;
-
7. A variable pressure valve apparatus comprising:
- a case having a fluid inlet port and a fluid discharge port;
a valve element for closing the fluid inlet port;
a spring member disposed in the case for biasing the valve element to close the fluid inlet port;
rotation means for undergoing rotation to deform the spring member and thereby vary a biasing force applied to the valve element by the spring member;
movable means disposed in the case for undergoing movement to rotate the rotation means; and
moving means for undergoing extension movement to move the movable means to thereby rotate the rotation means to deform the spring member. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
- a case having a fluid inlet port and a fluid discharge port;
-
23. A variable pressure valve apparatus comprising:
- a control probe having a primary electromagnetic coil for generating electric power; and
a variable pressure valve spaced apart from the control probe and having a fluid inlet port, a fluid discharge port, a valve element for closing the fluid inlet port, a spring member for biasing the valve element to close the fluid inlet port, rotation means for undergoing rotation to deform the spring member and thereby vary a biasing force applied to the valve element by the spring member, movable means for undergoing movement to rotate the rotation means, moving means for undergoing extension movement to move the movable means to thereby rotate the rotation means to deform the spring member, and a secondary electromagnetic coil supplied with electric power generated by the primary electromagnetic coil for supplying electric power to the moving means to extend the moving means. - View Dependent Claims (24, 25, 26, 27, 28)
- a control probe having a primary electromagnetic coil for generating electric power; and
Specification