Switching device for reciprocating pumps
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United States of America Patent
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Mar 26, 1991
Issued Date -
N/A
app pub date -
Mar 13, 1990
filing date -
May 28, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The objective of the present invention is to provide a reciprocation switching device for a pump which will solve problems of conventional devices such as that, because coil springs are used for activating by their snap action valve operators or switching operators serving to control the pressure of pump working fluid in relation to reciprocating action of the pump, such devices require the numerous number of parts including spring fitting shafts, the structure to attach such fitting shafts, parts for spring holders, etc.; and that the assembling of those parts is troublesome. A device according to the present invention uses one or two springs made into a C-like shape as the springs for the aforementioned purpose and calls for fitting said springs directly between the spring fitting section(s) and the valve operator or the switching operator.
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