Abstract:
The present disclosure provides a fluid pump having a pump motor, a pump drive shaft, and a vane pump assembly. The vane pump assembly includes a pump housing with a fluid inlet port in a distal portion of the housing and a fluid outlet port in a proximate portion. A first bearing member, having a plurality of inlet orifices in flow communication with the fluid inlet port, is disposed within the housing distal portion. A cam ring is adjacent the first bearing member. A rotor, which is mounted on the pump drive shaft, is disposed within an opening in the cam ring. This rotor includes a plurality of radial slots and vanes slidably received within the slots. A second bearing member, having a plurality of outlet orifices in flow communication with the fluid outlet port, is disposed within the housing proximate portion adjacent the cam ring. An end plate is also mounted within the distal portion of the pump housing. Rotation of the rotor by the drive shaft causes fluids from the fluid inlet port to be drawn through the plurality of inlet orifices at an initial fluid pressure. The fluids are then directed along a plurality of fluid flow paths disposed between an inner surface of the cam ring and an outer surface of the rotor, and then ejected through the plurality of outlet orifices to the fluid outlet port at a second fluid pressure which is greater than the initial fluid pressure.
Abstract:
A motor pump includes a pump head for pressurizing a fluid and an electric motor for driving the pump head. Within the pump head, radial forces produced in two symmetrical pumping zones are balanced against each other to reduce stress and increase efficiency. High pressure fluid exits the pump and follow a flowpath through the motor air gap, through an end bearing carrying a distal end of a hollow pump rotor shaft, and returning to the pump head by way of the hollow rotor shaft. The motor rotor shaft is axially movable with respect to the pump head, which effectively floats the motor rotor in high pressure fluid. A motor stator barrier can inhibits fluid flow into the motor stator, and a rotor barrier can inhibits fluid flow into the motor rotor. The rotor barrier can is efficiently attached to the rotor shaft in such a way as to stiffen the shaft and increase its bending resistance. The walls of the stator barrier can are thin and expand under fluid pressure to make contact with and find structural support from the stator laminations and motor endshield. Overheat conditions within the motor, as well as the pump head, are detected by positioning a heat sensing switch within the motor adjacent the pump head to shut down the motor when an overheat condition is detected.
Abstract:
A pump includes a coaxially integrated pump relief valve element (50) of high density polymer material that seats against a hard metallic sleeve (32). The sleeve (32) is pressed into a first counterbore (22) around the relief flow channel (20) with an interference fit. That axial end of the sleeve bearing the valve seat face projects, for a substantial proportion of the sleeve length, beyond the first counterbore shoulder into a second, larger diameter counterbore space (28) to provide an annular space (30) around the outside diameter surface of the sleeve to free the seat face end of the sleeve from direct structural restraint.
Abstract:
A coil assembly (10) includes a plastic bobbin (12) with wire (30,32) coiled thereon and coupled to the pins (38, 48, 54) of a connector (40). Plastic overmolding (60) covers wires (30,32) within bobbin (12) and fixes connector (40) relative to bobbin (12). A polyester bobbin (12) is made by injecting polyester into a mold having cavities (101, 151) to define the outer circumference of the bobbin and surrounding an arbor (106, 160) to define the inner circumference of the bobbin. The arbor (106, 160) with the molded bobbin (12) is removed from between the cavities (101, 151) and the bobbin (12) is slid laterally off the arbor by applying generally uniform pressure about a lateral edge (20, 22) of the bobbin so as not to warp same during the removal process.
Abstract:
Bloc de regroupement (10) doté de trois réceptacles (15-17) et d'agrafes de connexion (25) du type drapeau disposées dans les réceptacles. Les agrafes ont des tiges de fixation en V (27). Un couvercle intégré (11) pivote jusqu'au bloc de regroupement et comporte une patte (30) adaptée pour faire saillie dans la tige en forme de V d'au moins une des agrafes de connexion afin de la stabiliser.
Abstract:
A non-intrusive fluid level detector including a single point capacitive sensor (C4) mounted on the outside surface of a receptacle (10) such that capacitive principles can be utilized to sense the level (1, 2) of a liquid contained within the receptacle (10). The sensor assembly is disposed in a substantially fixed position on the exterior wall of the receptacle (10) wherein the dielectric effect of the liquid changes the effective capacitance of the sensing capacitor (C4) as the liquid rises and falls within the receptacle (10). This change in effective capacitance is detected by electronic circuitry included in the detector device. In one embodiment, the fluid level detector is directly mounted to a completely non-conductive receptacle (10). In another embodiment, the fluid level detector is mounted to a non-conductive window (12) which is an integral part of a receptacle fabricated out of a conductive material.
Abstract:
a A wheel bracket assembly comprising: a wheel bracket which includes two spaced portions, an axle extending between and supported on the bracket portions, a wheel, a bearing rotatably supporting the wheel on the axle, and first and second dust covers provided on opposite sides of the wheel, the first dust cover slidably engaging and being rotatably about the axle relative to the bracket but being noramlly held against such relative rotation through frictional engagement with the bracket. The first dust cover has a region which is spaced a predetermined radial distance from the axle and is approximately radially aligned with the bearing, and is manually rotatable relative to the associated bracket portion between a first position in which the region thereof is externally exposed and accessible and a second position in which the region is firmly disposed against an inner surface of the bracket portion so that external access thereto is obstructed by the bracket portion. The first dust cover has an arrangement at the region thereof for facilitating the introduction through the first dust cover of a lubricating material for the bearing.
Abstract:
A microcoil (10) having a winding (16) on a composite core made up of a portion (11) of substantially magnetic material and a portion (12) of substantially non-magentic material. The winding is split so that a part (17) of the magnetic material core portion is exposed, and a laser is preferably used to remove material from the exposed part of the magnetic core portion preferably forming a groove (21). The inductance of the coil is measured during the removal of the magnetic material, and the inductance of the coil is trimmed to a desired value through the removal of an appropriate amount of magnetic material. The non-magnetic core portion serves as a support structure for the portions of the winding on the core even if a substantial portion of the magnetic material is removed.