Fluid driven recipricating apparatus

A fluid driven reciprocating apparatus, comprising;

• a first intake-exhaust valve connected to a first chamber;
• a second intake-exhaust connect to a second chamber;
• and
• means sensitive to a state of fluid displacement in said first chamber for actuating said first and second intake-exhaust valves,
• said means for actuating said first and second intake-exhaust valves including a signal valve assembly,
• said signal valve assembly being mounted to only one of said first and second chambers, and including a pair of float activated valves.

In a back-to-back fluid driven pump assembly having movable members defining back-to-back power chambers therein, the improvement comprising:

• a pair of intake-exhaust valves;
• each of said intake-exhaust valves being directly connected to one of said power chambers, and adapted to be connected to a source of fluid pressure;
• and
• a signal valve including a rod connected to only one of said movable members;
• said signal valve being operatively connected by fluid communication to each of said pair of intake-exhaust valves for activating same upon movement of said rod by a movable member;
• whereby said power chambers may be selectively connected to an associated source of fluid pressure for driving a movable member positioned in said power chamber when connected to an associated source of fluid pressure.

A fluid pumping apparatus, comprising:

• a single cylinder;
• means for allowing liquid to be pumped to enter and discharge from said cylinder;
• means for allowing a pressurized driving fluid to enter and exhaust from said cylinder;
• a pair of intake/exhaust valve assemblies operatively connected to said means for allowing a pressurized driving fluid to enter and exhaust from said cylinder;
• one of said intake/exhaust valve assemblies being adapted for connection to an associated source of said pressurized driving fluid;
• and
• a sign a single signal valve means for controlling said pair of intake/exhaust valve assemblies in response to a preselected amount of pressurized driving fluid in said cylinder;
• whereby said pressurized driving fluid as it enters said cylinder causes liquid in said cylinder to increase in pressure and be discharged from said cylinder, and whereby said single signal valve means upon the preselected amount of pressurized driving fluid entering said cylinder activates said pair of intake/exhaust valve assemblies to cause said pressurized driving fluid to exhaust from said cylinder and allow liquid to be pumped to enter said cylinder.

A fluid pumping apparatus, comprising:

• at least one cylinder;
• means for allowing liquid to be pumped to enter and discharge from said cylinder;
• means for allowing a pressurized driving fluid to enter and exhaust from said cylinder;
• a pair of intake/exhaust valve assemblies operatively connected to said means for allowing a pressurized driving fluid to enter and exhaust from said cylinder;
• one of said intake/exhaust valve assemblies being adapted for connection to an associated source of said pressurized driving fluid;
• and
• signal valve means for controlling said pair of intake/exhaust valve assemblies in response to a preselected amount of pressurized driving fluid in said cylinder;
• whereby said pressurized driving fluid as it enter said cylinder causes liquid in said cylinder to increase in pressure and be discharged from said cylinder, and whereby said signal valve means upon the preselected amount of pressurized driving fluid entering said cylinder activates said pair of intake/exhaust valve assemblies to cause said pressurized driving fluid to exhaust from said cylinder and allow liquid to be pumped to enter said cylinder;
• said signal valve means including a plurality of float activated members, one of said float activated member being located so as to be activated by said liquid to be pumped, and another of said float activated members being located so as to be activated by said pressured driving fluid.

An apparatus for alternately pressurizing and exhausting a pair of chambers comprising:

• a first intake-exhaust valve connected to a first chamber, said first intake-exhaust valve having a first control port, said first chamber receiving pressurized driving fluid when said first control port is vented, and said first chamber being exhausted when said first control port is pressurized;
• a second intake-exhaust valve connected to a second chamber, said second intake-exhaust valve having a second control port, said second chamber receiving pressurized driving fluid when said second control port is vented, and said second chamber being exhausted when said second control port is pressurized;
• first float activated signal valve means for venting said first control port when said second chamber is exhausted, additionally venting said first control port when said first chamber is substantially empty of driving fluid, and otherwise pressurizing said first control port when said second chamber is pressurized;
• and
• second float activated signal valve means for venting said second control port when said first chamber is exhausted, additionally venting said second control port when said first chamber is substantially full of driving fluid, and otherwise pressurizing said second control port when said first chamber is pressurized.