Valve with axially movable valving tube and laterally movable valving wall

Claim 2

A valve comprising: a body having a chamber and a first port and a second port passing through said body to the chamber; a valve operator movably mounted in said chamber and carrying a valving wall; a valving tube extending from one of said ports into the chamber and into a valving cavity of said valve operator, said tube having an axis and an axial tube passage in fluid communication with said one of said ports, and being axially shiftable in said body, the valve operator being laterally movable relative to the tube axis; a valving seal adjacent to the end of said valving tube which is closest to the valve operator, said seal having a sealing perimeter which surrounds said tube passage; closure region on said valving wall which is congruent to the said sealing perimeter, and within which closure region the valving wall is imperforate, whereby when the closure region and sealing periphery are in abutment, the tube passage, and therefore the valve, are closed; a rotatable cam bearing a camming surface thereon; a cam follower on the valving tube, the camming surface and cam follower being so proportioned, disposed and arranged as to shift the valving tube axially when the cam is rotated, whereby to remove the valving seal from contact with the closure region when the valve is opened, and to return it to abutting contact therewith when the valve is closed.

Claim 3

A valve according to claim 1 in which the cam and the valve operator are rigidly joined, whereby to turn simultaneously with one another.

Claim 4

A valve according to claim 2 in which a substantial area of the valving wall adjacent to the closure region is a concave surface of revolution generated around the said axis of rotation, to which area the sealing periphery is congruent.

Claim 5

A valve according to claim 1 in which bias means biases the valving tube toward the valve operator.

Claim 6

A valve according to claim 4 in which said bias means is a spring.

Claim 7

A valve according to claim 4 in which said bias means is a differential area on the valving tube exposed to pressure in said chamber.

Claim 8

A valve according to claim 1 in which thrust means is attached to the valve operator which is so disposed and arranged as to contact the valving tube and thrust it against the valving wall when the valve is closed.

Claim 9

A valve according to claim 7 in which the thrust means comprises an abutment and in which an abutment is formed on the valving tube, these abutments making contact with one another to force the valving tube toward the valving wall.

Claim 10

A valve according to claim 8 in which bias means biases the valving tube toward the valve operator.

Claim 11

A valve according to claim 7 in which the valving seal can yield axially relative to the valving tube axis to permit the valving tube to move axially while the valving seal is in contact with the valving wall.

Claim 12

A valve according to claim 10 in which the thrust means comprises an abutment and in which an abutment is formed on the valving tube, these abutments making contact with one another to force the valving tube toward the valving wall.

Claim 13

A valve according to claim 10 in which bias means biases the valving tube toward the valve operator.

Claim 14

A valve according to claim 1 in which the cam means permits the valve tube to engage the body at said other of the ports whereby said ports are connected only by the valving tube when the valve is fully open.

Claim 15

A valve according to claim 13 in which bias means biases the valving tube toward the valve operator.

Claim 16

A valve according to claim 13 in which thrust means is attached to the valve operator which is so disposed and arranged as to contact the valving tube and thrust it against the valving wall when the valve is closed.

Claim 17

A valve according to claim 15 in which the valving seal can yield axially relative to the valving tube axis to permit the valving tube to move axially while the valving seal is in contact with the valving wall.

Claim 18

A valve comprising: a body having a chamber and a first port and a second port passing through said body to the chamber; a valve operatoR mounted in said chamber and rotatable around an axis of rotation; an internal valving wall defining a valving cavity in said valve operator; an external boundary wall on said valve operator; a valving port extending through the valve operator and interconnecting said walls, said valving port having a limiting edge at its intersection with the valving wall; a valving tube extending from one of said ports into the chamber and into the valving cavity, said tube having an axis and an axial tube passage in fluid communication with said one of said ports, and being axially shiftable in said body; a valving seal adjacent to the end of said valving tube which is closest to the valve operator, said seal having a sealing perimeter which surrounds said tube passage; a closure region on said valving wall which is congruent to the said sealing perimeter, and within which closure region the valving wall is imperforate, whereby when the closure region and sealing periphery are in abutment, the tube passage, and therefore the valve, are closed; a rotatable cam bearing a camming surface thereon; a cam follower on the valving tube, the camming surface and cam follower being so proportioned, disposed and arranged as to shift the valving tube axially when the cam is rotated, whereby to remove the valving seal from contact with the closure region when the valve is opened, and to return it to abutting contact therewith when the valve is closed, the limiting edge of said valving port lying outside the sealing periphery when the valve is closed, the valving port moving into at least partial alignment with the tube passage when the valve is opened.

Claim 19

A valve comprising: a body having a chamber and a first port and a second port passing through said body to the chamber; a valve operatoR mounted in said chamber and rotatable around an axis of rotation; an internal valving wall defining a valving cavity in said valve operator; an external boundary wall on said valve operator; a valving port extending through the valve operator and interconnecting said walls, said valving port having a limiting edge at its intersection with the valving wall; a valving tube extending from one of said ports into the chamber and into the valving cavity, said tube having an axis and an axial tube passage in fluid communication with said one of said ports, and being axially shiftable in said body; a valving seal adjacent to the end of said valving tube which is closest to the valve operator, said seal having a sealing perimeter which surrounds said tube passage; a closure region on said valving wall which is congruent to the said sealing perimeter, and within which closure region the valving wall is imperforate, whereby when the closure region and sealing periphery are in abutment, the tube passage, and therefore the valve, are closed; a rotatable cam bearing a camming surface thereon; a cam follower on the valving tube, the camming surface and cam follower being so proportioned, disposed and arranged as to shift the valving tube axially when the cam is rotated, whereby to remove the valving seal from contact with the closure region when the valve is opened, and to return it to abutting contact therewith when the valve is closed, the limiting edge of said valving port lying outside the sealing periphery when the valve is closed, the valving port moving into at least partial alignment with the tube passage when the valve is opened.

Claim 20

A valve according to claim 17 in which the cam and the valve operator are rigidly joined, whereby to turn simultaneously with one another.

Claim 21

A valve according to claim 18 which the location and dimensions of the limiting edge of the valving port are such that the valve seal never contacts the limiting edge.

Claim 22

A valve according to claim 18 in which a substantial area of the valving wall adjacent to the closure region is a concave surface of revolution generated around the said axis of rotation, to which area the sealing periphery is congruent.

Claim 23

A valve according to claim 17 in which bias means biases the valving tube toward the valve operator.

Claim 24

A valve according to claim 21 in which said bias means is a differential area on the valving tube exposed to pressure in said chamber.

Claim 25

A valve according to claim 21 in which said bias means is a differential area on the valving tube exposed to pressure in said chamber.

Claim 26

A valve according to claim 17 in which thrust means is rotatably mounted to the body which is so disposed and arranged as to contact the valving tube and thrust axially so the valving seal is assured of contact with the closure region.