초록 ▼

A valve for alternately interrupting and permitting fluid flow is comprised of a cylindrical valve body having medial inlet and outlet chambers which are interconnected by a flow restricting orifice. An inlet enters into the inlet chamber, which opens out of the lower end of the valve body, and an o

A valve for alternately interrupting and permitting fluid flow is comprised of a cylindrical valve body having medial inlet and outlet chambers which are interconnected by a flow restricting orifice. An inlet enters into the inlet chamber, which opens out of the lower end of the valve body, and an outlet enters into the outlet chamber, which opens out of the upper end of the valve body. A poppet, which slidably fits within the inlet chamber, translates between a closed position wherein it prevents fluid flow through the orifice and an open position wherein flow is permitted, but is normally biased to its closed position by a spring. A plunger, which slidably fits within the outlet cavity, has a reduced diameter extension which extends through the orifice into contact with the poppet so that depression of the plunger causes the poppet to be moved to its open position and, unless otherwise restrained, release of the plunger would cause the poppet to be moved to its closed position. However, a cam, which is located in the valve body, is operably associated with the plunger to limit its travel in a manner such that repeated depression and release of the plunger causes it to be placed alternately in either a raised position, out of contact with the poppet, or in a lowered position, which places the poppet in its open position. Accordingly, the valve intermittently opens and closes as the plunger is repeatedly depressed and released.

대표청구항 ▼

A valve for interrupting fluid flow comprising: (a) a valve body defining a cavity therein, said cavity being separated into an inlet chamber and an outlet chamber which are interconnected by a restrictive orifice, said outlet chamber opening out of said valve body and having an expanded diameter se

A valve for interrupting fluid flow comprising: (a) a valve body defining a cavity therein, said cavity being separated into an inlet chamber and an outlet chamber which are interconnected by a restrictive orifice, said outlet chamber opening out of said valve body and having an expanded diameter seat defined in the upper portion thereof; (b) inlet means passing through said valve body into said inlet chamber and outlet means passing through said body into said outlet chamber; (c) a poppet dimensioned to slidably fit within said inlet chamber and movable between a closed position wherein it prevents fluid flow to said orifice, and an open position wherein said flow is unrestricted, including poppet biasing means for normally urging said poppet to its closed position; (d) reciprocative plunger means slidably mounted within said cavity and associated with said poppet for moving said poppet between said open and closed positions, wherein said plunger slidably fits partially within said outlet chamber and partially extends outwardly therefrom, and includes a reduced diameter extension which passes through said orifice into contact with said poppet when said plunger is depressed in said valve body, and has a central bleed passageway which passes from the distal extremity of said extension through said plunger; (e) said poppet having a conical tip arranged to seal said passageway when said extension comes into contact with said poppet; (f) plunger biasing means associated with said plunger for urging it outwardly in said outer chamber; (g) cam means operably associated with said plunger means so that repeated activation of said plunger means causes said poppet to alternate between said open position and said closed position, said cam means comprising: (1) a hollow cylindrical cam element, arranged to fit within said seat, (2) said cam element including a circuitous track which extends about its inner periphery and which is defined by upper and lower surfaces of a recessed groove located in said cam element, said track comprising a first vertical leg, wherein said upper and lower surfaces are vertical and parallel to one another, which extends from near the bottom of said cam element upwardly to a first predetermined point on said cam element, said first vertical leg being followed by a first upwardly sloped leg, wherein said upper surface slopes upwardly from said first predetermined point, which terminates at a second predetermined point on said cam element, said second predetermined point lying above said first predetermined point, said first upwardly sloped leg being followed by a second vertical leg, wherein said upper surface extends vertically, which terminates at a third predetermined point intermediate said second predetermined point and the bottom of said cam element, said second vertical leg being followed by a first downwardly sloped leg, wherein said lower surface slopes downwardly from said third predetermined point, which terminates at a fourth predetermined point lying near the bottom of said cam element, said first downwardly sloped leg being followed by a third vertical leg, wherein said lower surface is vertical, which terminates at a fifth predetermined point intermediate said third and fourth predetermined points, said third vertical leg being followed by a second upwardly sloped leg, wherein said upper surface slopes upwardly from said fifth predetermined point, which terminates at a sixth predetermined point which lies below said second predetermined point, said second upwardly sloped leg being followed by a second downwardly sloped leg, wherein said lower surface slopes downwardly from said sixth predetermined position, which terminates at the bottom end of said first vertical leg; (3) retention means for securing said cam element within said valve housing; and (4) cam follower means joined to said plunger for engagement with said track; (h) cover means associated with said plunger means for activating said plunger means merely by application of a linear downward force on said cover means.