Gate valve
AssigneeEbara Corporation
InventorTsutomu KARIMATA
Life of this patent
Estimating the term…
Abstract
A gate valve 1 includes: a plate 2 having an opening portion 9; a plate 3 located opposite to the plate 2; a guide space 5 formed between the plates 2, 3; and a plate 6 provided in the space 5. The plate 6 is slidable along a direction in which an opening portion 11 is offset from the opening portion 9 in the space 5 in a state in which the plate 6 is pressed by the pressing portion 13 and separated from the plate 2, and a position of the plate 6 is fixed with respect to the plate 2 in the space 5 in a state in which the plate 6 is pressed by the pressing portion 16 and is in contact with the plate 2. The pressing portions 13, 16 each have a bellows structure formed by diffusion-bonding metal plates 18 and 19 to each other.
Claims7
A gate valve, comprising:
- a first plate having a first opening portion;
- a second plate having a second opening portion and located opposite to the first plate;
- a valve body guide space formed between the first plate and the second plate;
- and
- a valve body plate provided in the valve body guide space and having a valve body opening portion, wherein:
- the first plate has a first pressing portion provided thereon, the first pressing portion pressing the valve body plate in a direction away from the first plate;
- the second plate has a second pressing portion provided thereon, the second pressing portion pressing the valve body plate in a direction toward the first plate;
- the valve body plate is slidable along a direction in which the valve body opening portion is offset from the first opening portion in the valve body guide space in a state in which the valve body plate is pressed by the first pressing portion and separated from the first plate;
- a position of the valve body plate is fixed with respect to the first plate in the valve body guide space in a state in which the valve body plate is pressed by the second pressing portion and is in contact with the first plate;
- and
- the first pressing portion and the second pressing portion each have a bellows structure formed by diffusion-bonding a plurality of thin plates made of metal to each other.
Dependencies are inferred from the claim text.