초록 ▼

A fast acting on/off valve formed of molded plastic components includes a molded plastic body bearing offset inlet and outlet passages which extend from opposite ends through integral nipples to a common area, with communication effected by way of a bore and counterbore for respective outlet and inl

A fast acting on/off valve formed of molded plastic components includes a molded plastic body bearing offset inlet and outlet passages which extend from opposite ends through integral nipples to a common area, with communication effected by way of a bore and counterbore for respective outlet and inlet passage portions. The end of the bore, at a shoulder formed between the bore and counterbore, is chamfered. A spool type plunger having lands at opposite ends is mounted within the counterbore and bore with one land sized to the bore and the other being sized to the counterbore, that land having a conical inside face at an angle corresponding to the chamfer. A coil spring is compressed between the larger diameter land end of the plunger and a cap which is welded to the valve body and closes off the counterbore, the spring biasing the spool type plunger to valve closed position. An O-ring of an outside diameter larger than the counterbore is borne by the counterbore and rests on the shoulder and effects a high integrity seal and valve seat for the tapered plunger land face. A smaller diameter O-ring is borne within a peripheral recess on the small diameter land to effect sealing of the plunger to the bore and cooperates with the larger diameter O-ring for double sealing during valve closure. A U-shaped actuator handle is formed of plastic and is snap fitted to the valve body with raised sidewalls protecting the inlet nozzle and the hose connection thereto.

대표청구항 ▼

A fast acting on/off valve comprising: a molded plastic valve body, said including offset, parallel inlet and outlet passages extending partially through said body from opposite ends thereof, a transverse flow passage intersecting said parallel inlet and outlet passages, said transverse flow passage

A fast acting on/off valve comprising: a molded plastic valve body, said including offset, parallel inlet and outlet passages extending partially through said body from opposite ends thereof, a transverse flow passage intersecting said parallel inlet and outlet passages, said transverse flow passage passing through said valve body and being comprised of a bore intersecting said outlet passage and a counterbore intersecting said inlet passage, with said counterbore defining with said bore a radial shoulder intermediate of said inlet and outlet passages, a spring biased valve plunger slidably mounted within said bore and including a portion closing off said bore and said counterbore at said radial shoulder, the improvement wherein: said valve plunger comprises a spool type valve member including a first land at one end thereof slidably and sealably mounted within said bore and partially projectable externally of said valve body and a second land at the opposite end thereof having a diameter in excess of the diameter of said bore but less than the diameter of said counterbore and including a conical valve contact face on the side facing said first land, an O-ring seal valve seat positioned within said counterbore against said radial shoulder and engageable by said conical valve contact face of said second land to provide a high integrity seal between said inlet and said outlet passages when said valve plunger is in said valve closed position under the spring bias of said biasing means and under the pressure of the fluid in said inlet passage, the edge of said bore at the radial shoulder being chamfered to form a conical surface at the same angle as the conical valve contact face of said second land, and wherein said first land comprises a peripheral recess, and said peripheral recess bears an O-ring sealing member whose outer diameter is slightly in excess of the diameter of said bore, and said O-ring sealing member is of a thickness in excess of the depth of said peripheral recess so as to provide a high pressure resilient seal between said valve plunger and said bore.