Abstract: An improvement in fluid filter bypass valve assemblies is disclosed in which bypassed fluid is discharged below the normal level of fluid in the assembly to avoid aeration of the by-passed fluid. The improved assembly includes a bypass valve structure comprising an elongated conduit communicating at one end with the high pressure side of the filter element and having a spring loaded sleeve slidably surrounding its free end. The free end of the conduit is normally sealed by the sleeve in cooperation with a flanged end cap but the sidewall of the free end of the conduit is provided with an aperture opening into a portion of the sleeve having enlarged internal dimensions so that fluid pressure higher than normal communicated through such opening into the sleeve will cause it to slide along the conduit against the spring loading and away from sealing engagement with the end cap to release fluid through the conduit. Preferred structural features of the bypass valve are described.

Abstract: An improved load moment sensing system for a lift truck having tilt and lift cylinders for tilting a mast and lifting a carriage on the mast, respectively. A sensor is provided for sensing the load moment placed on the frame and a sensor is provided for determining when the carriage is elevated on the mast. A logic system is responsive to the sensors for preventing actuation of the tilt and lift cylinders simultaneously when an overload is sensed while allowing rearward tilting only when an overload has been sensed and when the carriage is elevated. The system also prevents tilting forwardly when an overload has been sensed and when the carriage is elevated. The system also allows tilting forwardly when an overload has been sensed and the carriage is not elevated.