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Title: Fluid driven recipricating apparatus

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.
  1. (Davis, CA)
Issue Date:
OSTI Identifier:
Regents of University of California (Oakland, CA) LLNL
Patent Number(s):
US 5616005
Contract Number:
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
fluid; driven; recipricating; apparatus; comprising; pair; pump; assemblies; back-to-back; configuration; yield; bi-directional; piston; diaphragm; divides; chamber; therein; define; power; section; pumping; intake-exhaust; valve; connected; sections; chambers; function; direct; compressed; air; exhaust; therefrom; pistons; diaphragms; rod; assembly; constructed; signal; whereby; controlled; position; location; operation; provided; intake; valves; enable; filling; discharging; desired; pressure; reached; chamber therein; pump assembly; rod assembly; compressed air; apparatus comprising; pump assemblies; pumping section; fluid driven; pump chamber; driven pump; desired pressure; intake-exhaust valve; exhaust valves; fluid drive; bi-directional pump; direct fluid; /417/91/