Air switch and filter combination

Details Air switch and filter combination Air switch and filter combination

1982-03-24

1984-12-11

Schwadron, Martin P.

Fluid handling

Systems

With pump

13762521, 13762546, 417440, F17D 301

Patent

active

044872240

ABSTRACT:
An air switch comprises a switch body having a recess thereon and a switching member having an output connection port. The recess is connected to vacuum and pressure outlets through passages in the switch body. The vacuum passage is connected to a port on the wall of the recess while the pressure passage is connected to a partially circularly extending channel on the recess wall. The switching member is rotatably received in the recess and includes a radially extending channel on its inner wall. Positioning of the switching member in the vacuum or pressure modes places the member channel in fluid communication with either the vacuum port or the channel on the recess wall. When in the vacuum mode, the pressure channel is vented to the atmosphere and when in the pressure mode, the vacuum is similarly vented. When in the minimum pressure mode, a portion of the pressure is vented to the atmosphere although this pressure venting is reduced to zero when the switching member is in the maximum pressure mode. In a preferred construction, the switch is operable only when a vacuum filter connects the source of vacuum to the switch body.

REFERENCES:
patent: 241002 (1881-05-01), Hamilton
patent: 2994341 (1961-08-01), Leopold
patent: 3279745 (1966-10-01), Christenson
patent: 3836288 (1974-09-01), Evans
patent: 4171711 (1979-10-01), Bake

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