Power-assisted valve
OwnerWallace F. Kruegerinventor
Life of this patent
Estimating the term…
Abstract
A power-assisted valve is provided which is particularly effective for systems handling viscous materials, such as certain metering systems. The check valve operates effectively even with highly-filled viscous resins used in such systems. The valve includes a valve seat and a valve ball which can be urged toward the valve seat to a closed position by a fluid-powered cylinder and piston. The piston rod is separate from the valve ball so that the ball can rotate relative to the valve seat.
Claims12
Apparatus for metering viscous material comprising means for establishing a source of the material, an outlet where the material is at a higher pressure than the pressure of the material at the source, a first metering cylinder having a first ram reciprocable therein, first inlet means connecting said source of material with said first cylinder, said first inlet means having first check valve means enabling flow of the material only toward said first cylinder, first outlet means connecting said first cylinder with said outlet, said first outlet means having second check valve means enabling flow of material only away from said first cylinder, first fluid-operated drive means having a first drive cylinder, a first drive piston, a first drive piston rod, and means connecting said drive piston rod and said ram to cause said ram to reciprocate when said drive piston reciprocates, said first check valve means including means forming a first valve seat, a first valve body, a first fluid-operated valve cylinder having a first valve piston, first valve piston rod means affixed to said first valve piston and extending from said first valve cylinder and engagable with said first valve body, said second check valve means including means forming a second valve seat, a second valve body, and a second fluid-operated valve cylinder having a second valve piston, second valve piston rod means affixed to said second valve piston and extending from said second valve cylinder and engageable with said second valve body, first line means connected to the rod end of said drive cylinder, second line means connected to the blind end of said drive cylinder, control valve means for supplying fluid under pressure to either of said line means and for exhausting fluid from the other of said line means, third line means communicating with said first valve cylinder and with one end of said drive cylinder to cause said first valve piston to move said first valve piston rod means into engagement with said first valve body to urge said first body against said first valve seat when said drive piston is operated in a manner to cause said first ram to move in a direction into said first metering cylinder, and fourth line means communicating with said second valve cylinder and with the other end of said drive cylinder to cause said second valve piston to move said second valve piston rod means into engagement with said second valve body to urge said second body against said second valve seat when said drive piston is operated in a manner to cause said first ram to move in a direction out of said first metering cylinder.
Apparatus for metering viscous material comprising means for establishing a source of the material, an outlet where the material is at a higher pressure than the pressure of the material at the source, first metering means, first inlet means connecting said source of material with said first metering means, said first inlet means having first check valve means enabling flow of the material only toward said first metering means, first outlet means connecting said first metering means with said outlet, said first outlet means having second check valve means enabling flow of material only away from said first metering means, first fluid-operated drive means for operating said metering means to cause material to flow into said metering means through said inlet means and for causing material to flow out of said metering means through said outlet means, said first check valve means including means forming a first valve seat, a first spherical valve body, and a first fluid-operated valve cylinder having a first valve piston, first valve piston rod means affixed to said first valve piston and extending from said first valve cylinder and engageable with, but separate from, said first valve body, said second check valve means including means forming a second valve seat, a second spherical valve body, and a second fluid-operated valve cylinder having a second valve piston, second valve piston rod means affixed to said second valve piston and extending from said second valve cylinder and engageable with, but separate from, said second valve body, first line means connected to said first fluid-operated drive means, second line means connected to said first fluid-operated drive means, control valve means for supplying fluid under pressure to either of said line means and for exhausting fluid from the other of said line means to cause said first fluid-operated drive means to operate said first metering means, third line means communicating with said first valve cylinder and with said first fluid-operated drive means to cause said first valve piston to move said first valve piston rod means into engagement with said first valve body to urge said first valve body against said first valve seat when said fluid-operated drive means is operated in a manner to cause the material to move out of said metering means through said first outlet means, and fourth line means communicating with said second valve cylinder and with said first fluid-operated drive means to cause said second valve piston to move said second valve piston rod means into engagement with said second valve body to urge said second valve body against said second valve seat when said first fluid-operated drive means is operated in a manner to cause the material to move into said first metering means through said first inlet means.
Dependencies are inferred from the claim text.