Sequencing valve

A sequencing valve automatically responsive to pressure variation comprising:

• (A) a housing including
• (1) a cylindrical inlet section having a first interior cylindrical chamber defining an inlet port,
• (2) an outlet section defining a plurality of outlet ports, and
• (3) an intermediate section positioned therebetween and including:
• (a) a first cylindrical section having a second interior cylindrical chamber communicating with said outlet ports,
• (b) a second cylindrical section having a third interior cylindrical chamber positioned concentrically with and opening into said second interior cylindrical chamber,
• (c) said second cylindrical section intercepting said cylindrical inlet section to place their first and third interior cylindrical chambers into communication,
• (B) a valving member located in said second interior cylindrical chamber of said housing intermediate section and having at least one port therein,
• (C) pressure sensitive means for controlling said valving member between a seated and unseated position wherein the seated position the valving member port registers with one of said housing outlet ports while the remainder of the valving member blocks flow through the remaining housing outlet ports, and for rotational indexing motion wherein said valving member port is indexed to be in register with a second outlet port in response to pressure variation and including:
• (1) a piston member positioned in said third interior cylindrical chamber of said housing intermediate section to form a piston-cylinder assembly therewith which is operative in response to pressure variations between a closed position wherein flow therethrough is prevented and an open, out-of-register position wherein flow from said third interior cylindrical chamber to said second interior cylindrical chamber and said valving member is permitted,
• (2) a stem means connecting said piston member to said valving member, and
• (3) cam means operatively connected to said housing and said stem means to cause said valving member to be sequentially indexed in response to pressure variations so that the valving member port will be in register with said second outlet port,
• (D) said second cylindrical section of said housing intermediate section including a circular sealing surface sized and positioned so that said piston member will sealably bear thereagainst when at one end of its reciprocating travel.

A sequencing valve comprising a housing, said housing including an inlet port and an outlet section having a plurality of outlet ports, said housing having a first chamber connected to said outlet ports, said housing further defining an internal flow passage whereby fluid communication may be established between said inlet port and said first chamber, said internal flow passage having an opening entering into said first chamber, a valving member located in said first chamber having at least one port therethrough, said valving member being movable between a seated and unseated position, in the seated position a valving member port registers with one of said housing outlet ports while the remainder of the valving member blocks flow through the remaining outlet ports, in the unseated position the valving member is spaced from said outlet ports, piston means located in said housing for cooperation with said opening in said internal flow passage, said piston means being movable between a position where it coacts with said internal flow passage to prevent flow therethrough to a position allowing flow from said opening of said internal passage into said first chamber, stem means connecting said piston means to said valving member, biasing means for biasing said piston means into a position coacting with said opening in said internal passage to prevent flow therethrough until sufficient pressure has been generated to overcome said biasing means and for biasing said valving member into its unseated position, said housing having a circular sealing surface for said piston means to sealably bear against when fully biased by said biasing means to prevent reverse flow around said piston means back into said inlet port, said piston means being movable to its position in said first chamber allowing flow in response to sufficient pressure generated at said inlet port, said movement of said piston means permitting said valving member to move to its seated position, cam means operatively connected to said housing and said stem means to cause said valving member to be rotatably indexed in response to movement of said piston means by proper pressure variations and said biasing means so that said valving member port can be sequentially aligned with each of said outlet ports.

A sequencing valve comprising a housing, said housing including an inlet port and an outlet section having a plurality of outlet ports, said housing having a first chamber connected to said outlet ports, said housing further defining an internal flow passage whereby fluid communication may be established between said inlet port and said first chamber, said internal flow passage including a second chamber having an opening entering into said first chamber, a valving member located in said first chamber having at least one port therethrough, said valving member being movable between a seated and unseated position, in the seated position a valving member port registers with one of said housing outlet ports while the remainder of the valving member blocks flow through the remaining outlet ports, in the unseated position the valving member is spaced from said outlet ports, piston means located in said housing for cooperation with said opening in said second chamber, said piston means being movable between a position where it coacts with said opening in said second chamber to prevent flow therethrough to a position in said first chamber allowing flow from said opening of said second chamber into said first chamber, stem means connecting said piston means to said valving member, biasing means for biasing said piston means into a position coacting with said opening in said second chamber to prevent flow therethrough until sufficient pressure has been generated to overcome said biasing means and for biasing said valving member into its unseated position, said second chamber having a circular sealing surface for said piston means to sealably bear against when fully biased by said biasing means to prevent reverse flow around said piston means back into said inlet port, said piston means being movable to its position in said first chamber allowing flow in response to sufficient pressure generated at said inlet port, said movement of said piston means permitting said valving member to move to its seated position, cam means operatively connected to said housing and said stem means to cause said valving member to be rotatably indexed in response to movement of said piston means by proper pressure variations and said biasing means so that the valving member port can be sequentially aligned with each of said outlet ports.