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US 6,318,408 B1Granted
Directional control valve
AssigneeSMC Corporation
InventorsYoshihiro Fukano, Shoichi Makado
Life of this patent
Estimating the term…
Abstract
A three-way valve comprises a valve body which is formed to have a rectangular parallelepiped-shaped configuration and which has a plurality of ports provided in juxtaposition on a first side surface having a narrow width, a solenoid section which is provided at the inside of a casing and which includes a fixed iron core, a movable iron core, and an electromagnetic coil, and a valve mechanism section provided with a diaphragm which is arranged coaxially with the solenoid section and which is displaceable in accordance with an exciting action on the electromagnetic coil to switch the communication state between the first to third ports.
Claims31
A directional control valve comprising:
- a main valve body having, on a first side surface, a plurality of ports;
- a solenoid section provided at the inside of said main valve body and including a fixed iron core, a movable iron core, and a coil;
- and
- a valve mechanism section provided with a valve plug arranged coaxially with said solenoid section at the inside of said main valve body, for switching communication states of said plurality of ports by making displacement in accordance with an exciting action on said coil,
- wherein said valve mechanism section includes a displacement member connected to a first end of said movable iron core, a first spring member for pressing said displacement member toward said plurality of ports, a first pressing member and a second pressing member provided substantially in parallel to an axis of said displacement member, a second spring member fastened to said second pressing member, and a swinging member for being engaged with said first pressing member at a first end side and being engaged with said second pressing member at a second end side, said swinging member making swinging displacement about a supporting point of a shaft member attached at a central portion for rotation, and
- wherein said first pressing member is fitted to a hole of said displacement member to make displacement in an integrated manner, and said second pressing member is loosely fitted to a hole of said displacement member via a second spring member.
3 more elements
A directional control valve comprising:
- a main valve body having, on a first side surface, a plurality of ports;
- a solenoid section provided at the inside of said main valve body and including a fixed iron core, a movable iron core, and a coil;
- and
- a valve mechanism section provided with a valve plug arranged coaxially with said solenoid section at the inside of said main valve body, for switching communication states of said plurality of ports by making displacement in accordance with an exciting action on said coil, wherein said valve mechanism section includes a displacement member connected to a first end of said movable iron core, a first spring member for pressing said displacement member toward said plurality of ports, a first pressing member and a second pressing member provided substantially in parallel to an axis of said displacement member, a second spring member fastened to said second pressing member, and a swinging member for being engaged with said first pressing member at a first end side and being engaged with said second pressing member at a second end side, said swinging member making swinging displacement about a supporting point of a shaft member attached at a central portion for rotation, and
- wherein hemispherical expanded sections are formed at first ends in said axial direction of said first pressing member and said second pressing member respectively, and said expanded sections are provided so that they make point-to-point contact with a flat surface portion of said swinging member.
2 more elements
A directional control valve comprising:
- a main valve body having, on a first side surface, a plurality of ports;
- a solenoid section provided at the inside of said main valve body and including a fixed iron core, a movable iron core, and a coil;
- and
- a valve mechanism section provided with a valve plug arranged coaxially with said solenoid section at the inside of said main valve body, for switching communication states of said plurality of ports by making displacement in accordance with an exciting action on said coil,
- wherein said valve mechanism section includes a displacement member connected to a first end of said movable iron core, a first spring member for pressing said displacement member toward said plurality of ports, a first pressing member and a second pressing member provided substantially in parallel to an axis of said displacement member, a second spring member fastened to said second pressing member, a shaft member, and a swinging member for being engaged with said first pressing member at a first end side and being engaged with said second pressing member at a second end side, said swinging member making swinging displacement about a single supporting point, said shaft member being attached at a central portion of said swinging member defining said single supporting point.
2 more elements
Dependencies are inferred from the claim text.