초록 ▼

An improved valve construction having increased flow/pressure characteristics. The valve comprises a molded valve body including a plurality of body sections each having a generally flat inner surface, and the inner surfaces are disposed in contiguous relation along an interface. Each inner surface

An improved valve construction having increased flow/pressure characteristics. The valve comprises a molded valve body including a plurality of body sections each having a generally flat inner surface, and the inner surfaces are disposed in contiguous relation along an interface. Each inner surface is formed with a plurality of recesses that mate with and complement recesses in the inner surface of the other body section to form a valve chamber and a connecting piston chamber. A spool valve is mounted for sliding movement in the valve chamber, while a piston having a generally oval cross-section is connected to the spool and is mounted for movement in the oval-shaped piston chamber. The inner surfaces of the body sections are also formed with a plurality of channel portions which mate and complement channel portions in the other body section to form flow channels that communicate with the valve chamber and the piston chamber. By supplying fluid to the piston chamber, the piston will be moved to actuate the valve to control the flow of fluid to an external operating member, such as a fluid cylinder. The valve member, piston and other moving components are sealed to the respective chambers by annular seal assemblies that consist of a rigid back-up ring and a resilient ring that is mechanically locked and bonded to the back-up ring.

대표청구항 ▼

[ I claim:] [1.] A valve construction, comprising a body including plurality of body sections each having an inner surface, said inner surfaces being disposed in contiguous relation along an interface, each inner surface having a plurality of recesses that mate and complement recesses in the surface

[ I claim:] [1.] A valve construction, comprising a body including plurality of body sections each having an inner surface, said inner surfaces being disposed in contiguous relation along an interface, each inner surface having a plurality of recesses that mate and complement recesses in the surface of the other body section to form a first chamber of non-circular cross section and a connected second chamber, a piston disposed for sliding movement in said first chamber and having a non-circular cross-section to complement the non-circular cross section of the first chamber, said piston having a major diameter and a minor diameter, said major diameter disposed parallel to said interface, a valve member disposed for movement in said second chamber and operably connected to said piston, each inner surface having a group of first channel portions each mating with and complementing a group of first channel portions in the inner surface of the other body section to form flow channels communicating with second chamber, means for supplying a fluid to said flow channels, means for moving said piston to operate said valve member and control flow of fluid in said flow channels, and connecting means for connecting the inner surfaces of the body sections together along said interface.