Air pressure control device and adjustment valve
AssigneeAzbil Corporation
InventorKazuhisa INOUE
Life of this patent
Estimating the term…
Abstract
An air pressure control device includes first and second housings, a diaphragm partitioning an inner space of the housings into a first air chamber (one air chamber) and a second air chamber (the other air chamber), a valve seat supported by the diaphragm, a valve member arranged in the first air chamber and closing or opening a through-hole in the valve seat, a pressure adjusting mechanism (including a pressure adjusting bolt and an upper seat) that adjusts a force applied to the diaphragm from a side including the second air chamber, and a main spring (compression coil spring) disposed in the second air chamber and applying a spring force to a lower seat (spring receiving member) disposed on the valve seat. A bearing is interposed between the valve seat and the lower seat.
Claims4
An air pressure control device comprising:
- a diaphragm supported by a housing and partitioning an inner space of the housing into one air chamber and the other air chamber;
- a valve seat supported by the diaphragm in a state of penetrating through the diaphragm, the valve seat including a through-hole via which the one air chamber and the other air chamber are communicated with each other;
- a valve member arranged in the one air chamber, the valve member being movable closer to or away from the valve seat to close or open the through-hole;
- a pressure adjusting mechanism that adjusts a force applied to the diaphragm from a side including the other air chamber;
- and
- a compression coil spring disposed in the other air chamber and applying a spring force to a spring receiving member disposed on the valve seat,
- wherein a bearing is interposed between the valve seat and the spring receiving member.
The air pressure control device according to claim wherein the pressure adjusting mechanism comprises:
- a pressure adjusting bolt meshed with the housing;
- a pressing member held in contact with an end of the compression coil spring at a side opposite to the spring receiving member;
- and
- a bearing interposed between the pressure adjusting bolt and the pressing member.
Dependencies are inferred from the claim text.