Manual control valve

A control valve comprising:

• a valve body having first, second and third ports,
• a first tubular seat housing having an axial bore and being detachably connected to said valve body at said first port, said first seat housing extending radially outwardly of said body and having a first valve seat therein,
• a first poppet slidably mounted within said first seat housing, having an outer end adjacent said valve seat and having an inner end extending through said first port into said valve body, said first poppet having a first cam pin secured to said inner end and having a first cam receiving slot,
• a second tubular seat housing having an axial bore and being detachably connected to said valve body at said second port, said second seat housing extending radially outwardly of said body and having a second valve seat therein,
• a second poppet slidably mounted said second seat housing having an outer end adjacent said second valve seat and having an inner end entending through said second port into said valve body, said second poppet having a second cam pin secured to said inner end thereof and having a second cam receiving slot,
• spring means on said poppets for urging the poppets to a closed position in which said poppet outer ends contact said first and second valve seats respectively,
• a valve body cover secured to and sealing said valve body,
• a handle extending through said cover into said vlave body, said handle being journaled in said cover,
• a cam plate in said valve body between said first and second ports, said cam plate being received in both siad cam receiving slots,
• means for connecting said handle to said cam plate for rotation of said cam plate together with said handle,
• said cam plate having first and second slots receiving said first and second cam pins respectively,
• said cam plate being rotatable to first, second and third rotational positions and being configured (a) to shift one of said cam follower pin and said first poppet in a first direction when a major portion of said cam plate is disposed in said first cam receiving slot and said cam plate is in said first rotational position to thereby open said first port without opening said second port, and (b) to shift the other of said cam follower pins and said second poppet in a direction opposite said first direction, to thereby open said second port and without opening said first port when said cam plate is in said second rotational position and has a major portion disposed in said second cam receiving slot, and (c) to permit both said cam follower pins to shift outwardly of said valve body and allow both said first and second poppets to be shifted toward said first second valve seats respectively by said spring means and pressure within said valve body, thereby to close both said first and second ports, when said cam plate is disposed equally within said cam receiving slots and is in said third rotational position, and
• fitting means connected to the third port for supplying liquid under pressure to said valve body.

A manually operable control valve comprising:

• a valve body having a valve chamber,
• first and second mutually aligned ports in said body on opposite sides of and in communication with said chamber,
• a third port in said body in communication with said chamber,
• a cover opening in said body,
• a cover fixed to said body and sealing said cover opening, said cover having a handle aperture,
• a cam rotatably mounted in said chamber and having first and second oppositely disposed cam slots,
• a handle mounted to the cover and having a shaft extending through and journaled in said handle aperture and connected in rotational driving relation to said cam,
• first and second seat housings, each having an inner end connected to a respective one of said first and second ports, and each having an outer end positioned outwardly of a respective one of said first and second ports, each said seat housing outer end having a valve seat,
• first and second poppets sildably mounted in respective ones of said seat housings, each poppets having an outer end adjacent one of said valve seats and having a slotted inner end in said valve chamber receiving a portion of said cam and one of said cam slots,
• spring means for urging said poppets toward said valve seats,
• first and second cam pins carried carried by said slotted inner ends of the poppets and extending through respective ones of said cam slots,
• first and second output fittings connected to the outer ends of respective ones of said seat housings, and
• input fitting means connected to said third port for supplying pressurized liquid to said valve chamber, said handle and cam being rotatable to three mutually distinct cam positions,
• said poppets being movable between port open and closed positions in which said first and second ports are open and closed, respectively, said cam being configured to have a major portion in the slotted inner end of the first poppet to hold said first poppet in port open position in a first one of said cam positions, (b) to have a major portion in the slotted inner end of the second poppet to hold said second poppet in port open position in a second one of said cam positions, and (c) to have substantially equal portions in each of said slotted inner ends to allow both said first and second poppets to be driven by said spring means to closed port position in a third one of said cam positions.

A control valve comprising:

• a valve body having a valve chamber and first, second and third ports opening into said chamber, said first and second ports extending at an angle to one another
• first, second and third port housings having inner ends thereof connected and sealed to said body at respective ones of said ports,
• first poppet means slidably mounted in said first port housing and extending through said first port into said chamber, said first poppet means having a cam slot,
• second poppet means slidably mounted in said second port housing and extending through said second port into said chamber,
• a cam rotatably mounted in said chamber for motion to a plurality of operating postions and having a major portion thereof disposed within said cam slot in all said operating positions,
• first valve seat means for cooperating with said first poppet means to selectively open or close said first port,
• second valve seat means for cooperating with said second poppet means to selectively open or close said second port,
• said cam being configured to contact said first and second poppet means and drive each said poppet means from its respective valve seat means upon rotation of the cam, said cam having a relatively lesser area extending out of said cam slot when said first poppet is open and having a relatively greater area extending out of said cam slot when said second poppet is open, and
• valve operating means secured to said valve body for rotating said cam.

A manually operable control valve comprising:

• a valve body having a valve chamber,
• first, second and third ports in said body in communication with said chamber,
• a cover opening in said body,
• a cover fixed to said body and sealing said cover opening, said cover having a handle aperture,
• a cam rotatably mounted in said chamber and having a cam lobe,
• a handle mounted to the cover and having a stem extending through and journaled in said handle aperture and connected in rotational driving relation to said cam,
• first and second port housings, each having an inner end connected to a respective one of said first and second ports and each having an outer end positioned outwardly of a respective one of said first and second ports, said first port housing outer end having a first valve seat, said second port housing having a second valve seat at said inner end thereof,
• a third port housing connected to said third port,
• a first poppet slidably mounted in said chamber and extending between said first and third port housings and through said first and third ports, said first poppet having one end adjacent said first valve seat and having a slot intermediate the ends thereof extending through a portion of said poppet in said valve chamber, said slot receiving said cam,
• a second poppet slidably mounted in said second port housing and having an inner end at said second port for cooperation with said second valve seat, said second poppet having a cam follower on an inner end thereof extending through said second valve seat,
• spring means for urging said poppets toward said first and second valve seats respectively,
• said cam being rotatable in said cam slot and in said valve chamber between first and second cam positions and having a major portion within said slot in both said first and second cam positions, said cam being configured to have a relatively lasser area extending out of said cam slot and to push said first poppet from said first valve seat in said first cam position and to have a relatively greater area extending out of said cam slot and to push second poppet from said second valve seat in said second cam position,
• said second port housing including means for connection to a source of pressurized liquid, whereby in said first cam position said first port is opened by camming contact between the cam lobe and an end surface of said cam slot, and said second port is closed by forces exerted by said spring means and pressurized liquid, and in said second cam position said second poppet is pushed off the second valve seat by said cam lobe to admit pressurized liquid to said valve chamber, and said first poppet is driven onto its seat by forces exerted by said spring means and said pressurized liquid.