Valve device
AssigneeKabushiki Kaisha Kawasaki Precision Machinery
InventorsKaoru Nomichi, Seiji Ishii, Yutaka Suzuki, Makoto Ninomiya, Yuko Funakubo
Life of this patent
Estimating the term…
Abstract
A plunger (45) and a piston (46) are displaceably held in a housing (104) for opening and closing a valve path (107) defined in the housing (104), and a single common seat block (44) provided for the plunger (45) and the piston (46) is fixed to the housing (104) and has seat portions (47) each formed from a soft material for respective of the plunger (45) and the piston (46) to be pressed thereon. This arrangement provides a valve device which is simplified in structure and can be manufactured with reduced man-hour.
Claims10
A valve device comprising:
- a housing in which a valve path is defined;
- plural valve bodies displaceably held in said housing for opening and closing said valve path;
- and
- a single common seat block provided for said plural valve bodies and fixed to said housing for said plural valve bodies to be pressed thereon, said seat block having seat portions each comprising a soft material for said valve bodies to be pressed on respective of said seat portions, wherein:
- said seat block comprises a base comprising a hard material, a first seat-forming member fitted on said base to form a first one of said seat portions, and a second seat-forming member coupled to said base to form a second one of said seat portions, each of the first and second seat-forming members comprising the soft material;
- said base is fixed to said housing;
- said second seat-forming member is held between said base and said housing;
- and
- said base and said second seat-forming member provide sealing when a closed loop sharp ridge formed on said base is brought into contact with said second seat-forming member.
A valve device comprising:
- a housing defining a valve path;
- plural valve bodies displaceably disposed in the housing for opening and closing the valve path;
- and
- a single common seat block provided for the plural valve bodies, the seat block fixed within the housing, each of the valve bodies arranged to shift between an open position spaced away from the seat block and a closed position pressed against the seat block, the seat block comprising a base and having opposed seat portions on opposite sides of the base;
- a plurality of seat forming members, each seat forming member coupled to the seat block to form each seat portion, each seat forming member formed of a first material having a first stiffness;
- the base of the seat block formed of a second material having a second stiffness, the second stiffness greater than the first stiffness;
- at least one of the seat forming members being fitted on the base and secured between a portion of the base and a portion of the housing;
- and
- the base and the at least one seat forming member sealed to one another at a contact surface portion, the contact surface portion including an annular ridge formed on the base and positioned to contact the at least one seat forming member.
Dependencies are inferred from the claim text.