Pneumatic gate valve with an injection-molded valve housing

Details Pneumatic gate valve with an injection-molded valve housing Pneumatic gate valve with an injection-molded valve housing

2005-10-11

2005-10-11

Rivell, John (Department: 3753)

Fluid handling

Systems

Multi-way valve unit

C137S625690, C251S359000, C251S368000

Reexamination Certificate

active

06953055

ABSTRACT:
A pneumatic gate valve includes a valve housing made of injection-molded plastic material and having a plurality of external ports. Received in the valve housing are a plurality of valve bushings disposed in axial-spaced relationship as to define a valve bore and a plurality of pressure fluid compartments in fluid communication with the ports. A slide member for regulating a flow of compressed air between the ports is accommodated in the valve bore of the valve housing and displaceable in axial direction. The valve bushings are made of plastic material with a same melting temperature as the plastic material of the valve housing so as to realize a material union between the valve bushings and the valve housing, when plastic material is molded around the valve bushings during injection molding of the valve housing.

REFERENCES:
patent: 2910081 (1959-10-01), Karbowniczek
patent: 2938704 (1960-05-01), Quail
patent: 3329165 (1967-07-01), Lang
patent: 3580286 (1971-05-01), Bash
patent: 3884266 (1975-05-01), Kondo
patent: 3951166 (1976-04-01), Whitener
patent: 3952996 (1976-04-01), Hart
patent: 3960166 (1976-06-01), Linser
patent: 5361803 (1994-11-01), Stoll
patent: 6834676 (2004-12-01), Kulmann
patent: 197 45 802 (1999-04-01), None
patent: 0 443 779 (1991-08-01), None
patent: 10 184967 (1988-07-01), None

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