Abstract: A door assembly is configured to accept various lockboxes and locking mechanisms. The door assembly includes: a door with a cavity defined along an outer edge of the door; a lockbox that is positioned within the cavity and is removably secured to the door; and a locking mechanism that is carried by the lockbox. The lockbox includes various openings of different types, which are spaced to accommodate different types of locking mechanisms. The lockbox can be removed from the door to either replace the locking mechanism carried by the lockbox or to substitute the lockbox altogether to modify the locking features and/or functionality of the door assembly as desired or needed.

Abstract: A piston assembly is for a fluid delivery device, preferably a lubricant injector, the injector having a measuring chamber defined by an inner cylindrical surface and an axial end face, a flow port through the end face, and a central axis extending through the chamber. The piston assembly includes a piston body disposeable within the chamber so as to be linearly displaceable along the central axis. The piston body includes a cylindrical head, the head having first and second axial ends and an outer circumferential surface, and a rod extending axially from the second axial end of the piston head. A seal is coupled with the first axial end of the piston head and has an annular lip sealingly engageable with the chamber inner cylindrical surface and an axial end engageable with the chamber end face.

Abstract: A door assembly is configured to accept various lockboxes and locking mechanisms. The door assembly includes: a door with a cavity defined along an outer edge of the door; a lockbox that is positioned within the cavity and is removably secured to the door; and a locking mechanism that is carried by the lockbox. The lockbox includes various openings of different types, which are spaced to accommodate different types of locking mechanisms. The lockbox can be removed from the door to either replace the locking mechanism carried by the lockbox or to substitute the lockbox altogether to modify the locking features and/or functionality of the door assembly as desired or needed.

Abstract: A seal assembly includes an annular seal body disposable about a first member and having an axial sealing lip engageable with the radial surface of a second member, first and second circumferential ends and an outer circumferential surface. A plurality of teeth extend outwardly from the outer surface and are spaced circumferentially about a centerline. A first coupler member has teeth disposed between and attached to the teeth of the seal body to form a first attachment interface adjacent to the seal body first end. A second coupler member has teeth disposed between and attached to the teeth of the seal body to form a second attachment interface adjacent to the seal body second end. The first and second coupler members are connected so as to couple the two ends of the seal body and to retain the seal assembly about the first member.

Abstract: A piston assembly is for a fluid delivery device, preferably a lubricant injector, the injector having a measuring chamber defined by an inner cylindrical surface and an axial end face, a flow port through the end face, and a central axis extending through the chamber. The piston assembly includes a piston body disposeable within the chamber so as to be linearly displaceable along the central axis. The piston body includes a cylindrical head, the head having first and second axial ends and an outer circumferential surface, and a rod extending axially from the second axial end of the piston head. A seal is coupled with the first axial end of the piston head and has an annular lip sealingly engageable with the chamber inner cylindrical surface and an axial end engageable with the chamber end face.

Abstract: A seal assembly includes an annular seal body disposeable about a first member and having an axial sealing lip engageable with the radial surface of a second member, first and second circumferential ends and an outer circumferential surface. A plurality of teeth extend outwardly from the outer surface and are spaced circumferentially about a centerline. A first coupler member has teeth disposed between and attached to the teeth of the seal body to form a first attachment interface adjacent to the seal body first end. A second coupler member has teeth disposed between and attached to the teeth of the seal body to form a second attachment interface adjacent to the seal body second end. The first and second coupler members are connected so as to couple the two ends of the seal body and to retain the seal assembly about the first member.

Abstract: A shield device prevents materials from contacting a seal for a shaft extending outwardly from a housing and displacing a mounted component. The shield device includes an annular disk having opposing first and second radial surfaces and outer and inner circumferential edges, the inner edge defining a bore for receiving the shaft. The disk is coupleable with the shaft so as to be disposed between the component and the housing and is spaced axially above the seal such that the first radial surface faces the seal. The disk has an outside diameter greater than the seal outside diameter and overlaps the seal with the disk outer edge being spaced radially outwardly from the seal to provide a barrier about the seal. Preferably, an annular projection extends axially outwardly from the first, lower radial surface and is disposeable within a circular groove of the housing that extends about the seal.

Abstract: A shield device prevents materials from contacting a seal for a shaft extending outwardly from a housing and displacing a mounted component. The shield device includes an annular disk having opposing first and second radial surfaces and outer and inner circumferential edges, the inner edge defining a bore for receiving the shaft. The disk is coupleable with the shaft so as to be disposed between the component and the housing and is spaced axially above the seal such that the first radial surface faces the seal. The disk has an outside diameter greater than the seal outside diameter and overlaps the seal with the disk outer edge being spaced radially outwardly from the seal to provide a barrier about the seal. Preferably, an annular projection extends axially outwardly from the first, lower radial surface and is disposeable within a circular groove of the housing that extends about the seal.

Abstract: A switched reluctance drive includes a reluctance machine, a controller, power switches actuated by the controller and a current transducer for monitoring the current in each phase winding. The controller employs a sensorless rotor position detection technique by injecting voltage pulses into the idle period of each phase winding in a chopping mode. Acoustic noise associated with the injected pulses is concealed by varying the frequency at which the pulses are injected according to rotor speed. In an alternative embodiment the frequency is varied pseudo-randomly.

Abstract: A polyphase switched reluctance machine controlled by a control system using sensorless position detection. The controller is robust and reliable and operates over the entire speed range of the machine. In the chopping mode, diagnostic pulses of predetermined flux linkage are injected into an idle phase. In the single-pulse mode, position prediction is done using an active phase. A method of starting the machine uses diagnostic pulses in two phases to provide a unique value for position, allowing the drive to start or re-start under full torque.

Abstract: A polyphase switched reluctance machine is controlled by a control system using sensorless position detection. A method of operating the machine at high speeds interrogates every nth phase reference point to allow sufficient time for computations of position to be carried out, where n is an integer greater than one.