Poppet valve with heater
AssigneeSMC Corporation
InventorsIkuo Kanzaka, Mamoru Fukuda
Life of this patent
Estimating the term…
Abstract
A cylindrical heat-generating member is disposed in a valve casing including a valve seat in a flow path connecting main ports, a valve member for opening and closing the valve seat, and a rod connecting the valve member and a piston. A first heater is mounted in the heat-generating member. The heat-generating member and a heat receiving member of the valve member are connected to each other by a heat-transfer member for expansion and contraction. As a result, the valve member is constantly heated through the heat-transfer member irrespective of its open/closed position. When the valve member is open, the heat receiving member comes in contact with the heat-generating member and the valve member is directly heated.
Claims15
A poppet valve with a heater, the valve comprising:
- a valve casing including a first main port and a second main port, a flow path connecting both the main ports, and a valve seat provided in the flow path;
- a cylinder connected to the valve casing;
- a poppet-type valve member provided in the valve casing to open and close the valve seat;
- a rod having a tip end portion connected to the valve member and a base end portion on an opposite side and extending into the cylinder;
- a piston disposed for sliding in the cylinder and connected to the base end portion of the rod;
- a heat-generating member disposed in a fixed position in the valve casing and having at its tip end portion a heat-transfer face with which the valve member comes in contact in an open position;
- a heat-transfer member disposed for expansion and contraction in response to an operation of the valve member between the heat-generating member and the valve member to constantly transfer heat from the heat-generating member to the valve member;
- and
- a first heater mounted to the heat-generating member.
A poppet valve with a heater, the valve comprising:
- a valve casing including a first main port and a second main port, a flow path connecting both the main ports, and a valve seat provided in the flow path;
- a valve member provided in the valve casing to open and close the valve seat;
- a rod for driving the valve member;
- a heat-generating member disposed in a fixed position in the valve casing and having at its tip end portion a heat-transfer face with which the valve member comes in contact in an open position;
- a heat-transfer member disposed for expansion and contraction in response to an operation of the valve member between the heat-generating member and the valve member to constantly transfer heat from the heat-generating member to the valve member;
- a first heater mounted to the heat-generating member;
- and
- a bellows provided between a partition at an end portion of the valve casing and the valve member and housing the rod, the heat-generating member, the heat receiving member, and the heat-transfer member.
Dependencies are inferred from the claim text.