Automatic reversing valve

Motors: expansible chamber type – Constantly applied motive fluid with controlled venting – Cyclically operable

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91321, 91336, 91342, 91350, 91235, 91417R, F01L 1502, F01L 3100, F01B 2502

Patent

active

048708909

ABSTRACT:
A fluid energized double acting motor is provided for use as the drive for reciprocating mechanisms such as paint pumps for airless spray painting. A piston within the pump housing is moved by pressurized fluid controlled by an automatic reversing valve including spaced check valves. The check valves are selectively seated and unseated by a spring biased piston and fluid pressure controlled valve actuator assembly. The reversing valve system includes anti-stalling features and is of single, low cost, field repairable nature. The motor system also includes features to prevent chattering oscillation due to abrupt changes in motor load.

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