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Provision is made for an air control valve to bypass the ice forming exhaust of a reciprocating pressure activation chamber in a reciprocating double diaphragm pump utilizing the supply pressure to close a check valve in line between the valve and the chamber which is then opened to exhaust by exhau

Provision is made for an air control valve to bypass the ice forming exhaust of a reciprocating pressure activation chamber in a reciprocating double diaphragm pump utilizing the supply pressure to close a check valve in line between the valve and the chamber which is then opened to exhaust by exhaust fluid flow from the chamber.

대표청구항 ▼

A reduced icing air valve for an air motor comprising: a shiftable valve having a pilot piston for shifting said valve for alternatively supplying compressed air through first and second supply ports to opposed first and second power pistols in opposed air motor chambers respectively and for effecti

A reduced icing air valve for an air motor comprising: a shiftable valve having a pilot piston for shifting said valve for alternatively supplying compressed air through first and second supply ports to opposed first and second power pistols in opposed air motor chambers respectively and for effecting alternating exhaust of said chambers; said shiftable valve being further provided with bypass means independent of and intermediate said shiftable valve and each of said first and second air motor chambers for bypassing said shiftable valve by exhaust air from said air motor chambers: said bypass means being furthest actuated in an opposing direction by a source of supply air to said chambers.