Dual diaphragm pump with adjustable discharge side pressure trip switch
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United States of America Patent
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-
Oct 25, 1994
Grant Date -
N/A
app pub date -
Sep 16, 1993
filing date -
Sep 16, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A new structure for an efficient electric pump is described. The electric pump of this invention mainly comprises a cover plate, a top cover and a housing to make up the outside appearance. Its inside consists of a dual piston device, an eccentric transmission device for the pistons to stroke up and down, an electric motor, a switch, an adjustable pressure switch, a rotary dial for adjusting said pressure switch and the associated circuitry. The cover plate has two circular ball-shaped chambers for the pistons to create the sucking and the discharging. In between the two ball-shaped chamber are discharge and suction channels which are independent from each other but are joined together. Two ends of the channel are provided with clack valves for controlling the air flow to be drawing in on one side and discharge on the other side. The pressure switch is disposed beneath the discharge channel so that the pressure switch trips when the discharge pressure extends a preset limit. In addition, the bottom of the housing is provided with a plurality of post legs with compression springs to prevent from excessive vibrating during operation.
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