Control system for fluid flow apparatus

A device for controlling the flow of fluid through flexible collapsible conduit means, said device comprising

• a housing having spaced walls defining an interior area accommodating the mounting of a portion of the conduit means and including a door movable between an opening permitting access into said interior area and a closed position blocking said access,
• fluid control means carried within said interior area and being operative for controlling the flow of fluid through the conduit means, said fluid control means including
• plates means disposed in facing relationship with the conduit means, said plate means being operative for rotation through a range of positions and including a plurality of arcuate grooves concentrically arranged at radially spaced intervals outwardly of the axis of rotation of said plate means,
• cam means including at least one generally arcuately shaped cam member attachable to said plate means within a selected one of said arcuate grooves for movement in a generally arcuate path during rotation of said plate means, and
• pin means including at least one pin member associated with each of said cam members which are attached to said plate means, each of said pin members being disposed intermediate said plate means and the conduit means along said path of arcuate movement of said associated cam member for contact with said associated cam member during rotation of said plate means, each of said pin members being independently movable in response to contact by said associated cam member between the normal position and a displaced position, each of said pin members being operative during said movement from said normal position toward said displaced position for pressing against and collapsing a area of the conduit means to obstruct the flow of fluid therethrough,
• control handle means carried by said door and being operative for movement through a range of positions generally correlated with said range of positions of said fluid control means, and
• linkage means operative, when said fluid control means and said control handle means are each respectively positioned at generally the same relative correlated position within said respective range of positions, for releasable connecting said control handle means with said plate means in response to movement of said door into said closed position and, after said releasable connection has been made and said door is maintained in said closed position, for moving said fluid control means through its range of positions by rotating said plate means in response to and in relative correlation with movement of said control handle means through its range of positions.

A device for controlling the flow of fluid through flexible collapsible conduit means, said device comprising

• a housing having spaced walls defining an interior area accommodating the mounting of a portion of the conduit means and including a door movable between an open position permitting access into said interior area and a closed position blocking said access, said door including an exterior facing away from said interior area of said housing when said door is in said closed position and an interior facing toward said interior area of said housing when said door is in said closed position,
• fluid control means carried within said interior area and being operatively movable through a range of positions for controlling the flow of fluid through the conduit means,
• a control knob carried on the exterior of said door and being operative for rotation through a range of positions generally correlated with said range of positions of said fluid control means,
• linkage means operative, when said fluid control means and said control knob are each respectively positioned at generally the same relative correlated position within said respective range of positions, for releasable connecting said control knob with said fluid control means in response to movement of said door into said closed position and, after said releasable connection has been made and said door is maintained in said closed position, for moving said fluid control means through its range of positions in response to and in relative correlation with movement of said control knob through its range of positions, and
• latch means including
• a stationary member extending within said housing interior area toward said door and including a peripheral latching groove, and
• disc means supported on said interior of said door and operatively connected with said control knob for common rotation therewith, said disc means being operative, when said control knob and said fluid control means are each disposed out of said particular preselected correlated position, for engagement with said stationary member out of said latching groove as said door is moved toward said closed position to thereby prevent movement of said door into said closed position and said connection between said control knob and said fluid control means;
• being operative, when said control knob and said fluid control means are each disposed in said particular preselected correlated position, for engagement with said stationary member releasably within said latching groove as said door is moved into said closed position to thereby permit movement of said door into said closed position and said connection between said control knob and said fluid control means;
• and being further operative, when said door is in said closed position and said control knob and fluid control means are connected and disposed out of said preselected correlated position, for preventing disengagement between said disc means and said latching groove to thereby lock said door in said closed position.

A manually actuated control switch device for controlling the flow of fluid through flexible collapsible conduit means associated with a plasmapheresis assembly, said device comprising

• a housing having spaced walls defining an interior area accommodating the mounting of a portion of the conduit means and including a door movable between an open position permitting access into said interior area and a closed position blocking said access,
• fluid control means carried within said interior area for controlling the flow of fluid through the conduit means said fluid control means including
• plate means disposed in facing relationship with the conduit means, said plate means being operative for rotation through a range of positions,
• pin means disposed intermediate said plate means and the conduit means and movable between a normal position and a displaced position, said pin means being operative during said movement from said normal position toward said displaced position for pressing against and collapsing a area of the conduit means to obstruct the flow of fluid therethrough, and
• cam means operatively connecting said plate means with said pin means for moving said pin means between said normal and displaced positions in response to rotation of said plate means within said associated range of positions,
• control handle means carried by said door and being operative for movement through a range of positions generally correlated with said range of positions of said fluid control means, and
• linkage means operative, when said plate means and said control handle means are each respectively positioned at generally the same relative correlated position within said respective range of positions, for releasable connecting said control handle means with said plate means in response to movement of said door into said closed position and, after said releasable connection has been made and said door is maintained in said closed position, for rotating said plate means through its range of positions in response to and in relative correlation with movement of said control handle means through its range of positions.