초록 ▼

An improved differential pressure switch has its supply pressure (a.k.a. the "high side") connected to the high pressure side of a filtration unit and its downstream (a.k.a. the "low side") connected to the low pressure port of a fluid filtration unit. As the filter becomes clogged a diaphragm withi

An improved differential pressure switch has its supply pressure (a.k.a. the "high side") connected to the high pressure side of a filtration unit and its downstream (a.k.a. the "low side") connected to the low pressure port of a fluid filtration unit. As the filter becomes clogged a diaphragm within the improved differential pressure switch flexes, moving the actuator against spring resistance, which causes a pivoting motion of an actuator arm thus tripping the electrical switch.

대표청구항 ▼

1. An apparatus for opening and closing an electrical circuit in response to a pressure differential between two locations, said apparatus comprising:a body defining a high pressure port and a low pressure port, said body also defining a high pressure zone in communication with said high pressure po

1. An apparatus for opening and closing an electrical circuit in response to a pressure differential between two locations, said apparatus comprising:a body defining a high pressure port and a low pressure port, said body also defining a high pressure zone in communication with said high pressure port, said body also defining a low pressure zone in communication with said low pressure port; a diaphragm partially defining said high pressure zone and partially defining said low pressure zone; an elongate rocking shaft rocking in response to variation in the pressure differential between said high pressure zone and said low pressure zone; an O-ring providing a seal and a pivot point for said rocking shaft, said O-ring also partially defining said high pressure zone; and a switch operated by said rocking motion of said rocking shaft, said switch isolated from both said high and low pressure zones.