.~ With ambient fluid inlet valve to expanding working chamber
DEFINITION
Classification: 91/441
(under subclass 418) Apparatus in which the motor is provided with an additional valve means which opens to admit ambient fluid into an expanding chamber when the pressure in the chamber falls below the pressure of the ambient fluid source.
(1) Note. Ambient fluid is fluid which is not under pressure and does not cause the working member to move when it is being admitted to the expanding chamber; however, pressure motive fluid may be applied to the chamber when the ambient fluid source is cut off from the expanding chamber so that the ambient fluid trapped in the expanding chamber becomes pressurized and assists in moving the working member.
SEE OR SEARCH THIS CLASS, SUBCLASS:
16+, for expansible chamber motors with motive fluid supplied through diverse flow paths to a single expansible chamber in which the motor drifts or coasts on a lower motive fluid pressure.
