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An apparatus comprising a pair of fluid driven pump assemblies in a back-to-back configuration to yield a bi-directional pump. Each of the pump assemblies includes a piston or diaphragm which divides a chamber therein to define a power section and a pumping section. An intake-exhaust valve is connec

An apparatus comprising a pair of fluid driven pump assemblies in a back-to-back configuration to yield a bi-directional pump. Each of the pump assemblies includes a piston or diaphragm which divides a chamber therein to define a power section and a pumping section. An intake-exhaust valve is connected to each of the power sections of the pump chambers, and function to direct fluid, such as compressed air, into the power section and exhaust fluid therefrom. At least one of the pistons or diaphragms is connected by a rod assembly which is constructed to define a signal valve, whereby the intake-exhaust valve of one pump assembly is controlled by the position or location of the piston or diaphragm in the other pump assembly through the operation of the rod assembly signal valve. Each of the pumping sections of the pump assemblies are provided with intake and exhaust valves to enable filling of the pumping section with fluid and discharging fluid therefrom when a desired pressure has been reached.

대표청구항 ▼

A fluid driven reciprocating apparatus, comprising: a first intake-exhaust valve connected to a first chamber; a second intake-exhaust valve connected to a second chamber; a movable member located in each of Said chambers; and a means sensitive to a state of fluid displacement in said first chamber

A fluid driven reciprocating apparatus, comprising: a first intake-exhaust valve connected to a first chamber; a second intake-exhaust valve connected to a second chamber; a movable member located in each of Said chambers; and a 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 single signal valve assembly operatively connected to at least one of said movable members to activate said first and second intake-exhaust valves, said means interconnecting said movable members in a back-to-back relation.