초록 ▼

Valve apparatus controls fluid flows in ten flexible tubes. The tubes are opposite each other in pairs and associated with each of five cams. One half of each cam provides cam surfaces which close and open one tube, and the other half, the opposite tube. With this arrangement five switch positions,

Valve apparatus controls fluid flows in ten flexible tubes. The tubes are opposite each other in pairs and associated with each of five cams. One half of each cam provides cam surfaces which close and open one tube, and the other half, the opposite tube. With this arrangement five switch positions, which are equal to the number of cams, can be provided.

대표청구항 ▼

Valve apparatus for simultaneously controlling the flow of fluids in a plurality of flow paths comprising: a rotatable shaft; a plurality of cams mounted in parallel planes on said shaft for rotation therewith, each of said cams having a plurality of cam surfaces; detent means for providing a predet

Valve apparatus for simultaneously controlling the flow of fluids in a plurality of flow paths comprising: a rotatable shaft; a plurality of cams mounted in parallel planes on said shaft for rotation therewith, each of said cams having a plurality of cam surfaces; detent means for providing a predetermined plurality of switch positions for said shaft and cams; a plurality of flexible tubes providing said plurality of flow paths for said fluids, each unique pair of tubes being located in a plane corresponding to a unique one of said cams; rigid abutment means located on an opposite side of said tubes relative to said cam surfaces; said cam surfaces of said cams having preselected radii from the axis of rotation of said shaft to selectively compress closed a tube against said abutment means when the shaft is rotated to a particular switch position, said pairs of tubes being located opposite each other with respect to said unique one of said cams and each tube of such pair being exclusively associated with a unique half of the number of cam surfaces of such cam.