Infinitely variable pneumatic pulsatile pump

A pneumatic pump element, comprising:

• at least two pneumatically independent compression chambers;
• a plurality of compressible bladders, one associated with each compression chamber adapted to receive and eject a quantity of working fluid;
• a pump cartridge communicating each bladder with at least one supply of working fluid;
• and
• means for selectively supplying compressed operating fluid to each compression chamber to selectively compress any one of said bladders to cause working fluid to be ejected through a discharge of said cartridge.

An infinitely variable pneumatic pulsatile pump, comprising:

• a housing;
• a pneumatic control circuit associated with said housing;
• means for controlling the function of said circuit associated with said housing;
• a pump inlet/outlet cartridge;
• at least two pneumatically independent compression cylinders, each defining its own compression chamber, each said compression chamber being fluidly communicated with said pneumatic circuit;
• a plurality of compressible bladders, one associated with each of said compression chambers, each said bladder defining a working fluid receiving interior volume fluidly communicated with said cartridge;
• each said cylinder being pivotally connected to said housing between a first, use, position, and a second, cartridge/bladder removal, position;
• means for locking said cartridge and cylinders into the use position reciprocally movable with respect to said housing between a first, cartridge/bladder locking, position, and a second, cartridge/bladder release, position;
• said pneumatic circuit being fluidly communicated with a supply of pressurized operating fluid;
• and
• said pneumatic circuit selectively, but controllably communicating said pressurized operating fluid with said compression chambers to at least partially collapse said bladders and thereby eject working fluid from said cartridge as desired.