Abstract: A fluid system pressure indicator is adapted for use in fluid systems having a filter element. The fluid system force indicator includes a housing partitioned to be exposed to the fluid system to provide transmission of a mechanical force between these partitioned environments to indicate the fluid pressure. This exterior shape change is such that it can be identified through tactile means not requiring visual identification.

Abstract: A fluid system pressure indicator is adapted for use in fluid systems having a filter element. The fluid system force indicator includes a housing partitioned to be exposed to the fluid system to provide transmission of a mechanical force between these partitioned environments to indicate the fluid pressure. This exterior shape change is such that it can be identified through tactile means not requiring visual identification.

Abstract: A display provides indicates the remaining useful life of a filter element by providing a visible level of fluid in the display corresponding to the remaining useful life. The fluid level is adjusted by a valve responsive to a pressure differential across the filter element. An increasing pressure differential produces an increased fluid level in the display. The display may be provided with markings indicating that a particular fluid level in the display corresponds to the need to change a filter cartridge containing the filter element.

Abstract: The present invention discloses a drain assembly for securement over the sump opening of a filter cartridge that allows service personnel to drain water from the cartridge sump where access from directly beneath the cartridge is obstructed. The drain assembly includes a drain extension that effectively shifts the drain outlet from directly beneath the cartridge to a position radially outward of the cartridge housing side wall. The filter cartridge and drain assembly include locating features which cooperate to define an installed orientation of the drain extension and outlet relative to the cartridge housing. Defining the installed orientation of the drain assembly relative to the housing ensures that the drain valve member and outlet are accessible to service personnel while the cartridge is installed on the vehicle.

Abstract: A drain valve insert employs a stamped sheet metal body to support a threaded nut in an elevated position over the drain opening of a filter cartridge. Multiple fluid flow passages are defined between the polygonal periphery of the nut and the generally cylindrical sheet metal body of the insert. The insert body defines ledges to support the nut at its periphery corners and includes structures that prevent rotation of the nut relative to the insert body. Retaining arms project upwardly from the insert body and are bent over the nut to axially retain the nut seated against the ledges. The insert body and the nut are inexpensively formed in separate automated operations. Assembly of the nut into the insert body may also be automated.

Abstract: A fluid system pressure indicator is adapted for use in fluid systems having a filter element. The fluid system force indicator includes a housing partitioned to be exposed to the fluid system to provide transmission of a mechanical force between these partitioned environments to indicate the fluid pressure. This exterior shape change is such that it can be identified through tactile means not requiring visual identification.