Abstract: An improved pressure switch comprises a cover assembly, a pair of electrical terminals, a spring, a contact disk, a diaphragm and a banjo housing. The pair of electrical terminals can be partially covered by the cover assembly and the spring can be placed within the cover assembly. The contact disk can tightly be connected with the diaphragm and arranged on top of the spring. When the pressure exceeds a preset pressure level, the diaphragm can be deflected down onto the contact disk, which compresses the spring to contact the terminals. The terminals can be activated for energizing, for example, a hydraulic circuit if the contact disk contacts the terminals. Therefore, the disk can bias itself when the disk makes contact on the top of the terminals, which creates a movement of the disk to provide a self cleaning feature.

Abstract: A pressure switch includes a piston that is movably disposed in a sensor housing. The piston moves, in response to a media pressure being applied to a surface thereof, between at least a first piston position and a second piston position. A conical disc spring supplies a non-linear spring force to the piston, and exhibits a spring force hysteresis. A switch engages the piston and is moved between first and second switch states by the piston. The switch exhibits a switch hysteresis. The spring force hysteresis and switching hysteresis are individually adjustable and together may be used to adjust the overall hysteresis of the pressure switch.

Abstract: An improved pressure switch comprises a cover assembly, a pair of electrical terminals, a spring, a contact disk, a diaphragm and a banjo housing. The pair of electrical terminals can be partially covered by the cover assembly and the spring can be placed within the cover assembly. The contact disk can tightly be connected with the diaphragm and arranged on top of the spring. When the pressure exceeds a preset pressure level, the diaphragm can be deflected down onto the contact disk, which compresses the spring to contact the terminals. The terminals can be activated for energizing, for example, a hydraulic circuit if the contact disk contacts the terminals. Therefore, the disk can bias itself when the disk makes contact on the top of the terminals, which creates a movement of the disk to provide a self cleaning feature.

Abstract: A pressure switch includes a piston that is movably disposed in a sensor housing. The piston moves, in response to a media pressure being applied to a surface thereof, between at least a first piston position and a second piston position. A conical disc spring supplies a non-linear spring force to the piston, and exhibits a spring force hysteresis. A switch engages the piston and is moved between first and second switch states by the piston. The switch exhibits a switch hysteresis. The spring force hysteresis and switching hysteresis are individually adjustable and together may be used to adjust the overall hysteresis of the pressure switch.

Abstract: A dolly for moving a snowmobile on a supporting surface such as a garage floor, ground, etc., wherein the dolly may be positioned beneath the snowmobile from the forward portion of the snowmobile. The dolly has a jack associated therewith which may be operated to raise the track portion of the snowmobile from the ground. The forward end of the dolly may then be moved upwardly so that the skis of the snowmobile are also moved out of engagement with the supporting surface. The snowmobile may then be conveniently moved from one location to another.