1. A fluid filtering cartridge comprising:
(i) a filter element including a body of filtering media and having a substantially hollow interior in fluid communication with an opening extending through said filtering media; and,
(ii) a sealing element situated in said opening, said sealing element presenting a fluid-tight seal between said opening and a conduit received therein, said sealing element comprising a radially inwardly directed flange having an inwardly disposed edge with a ring member secured thereto, said ring member having an interior face sealingly received about the exterior surface of the conduit when the conduit is received within said opening through said filtering media to present a fluid-tight seal between the exterior surface of said conduit and the interior surface of said opening.
2. The device as claimed in claim 1 wherein said ring member has a leading edge directed outwardly from said hollow interior of said filtering media and a trailing edge directed inwardly toward said hollow interior of said filtering media.
3. The device as claimed in claim 2 wherein said ring member is frustoconical in shape with the inside diameter of said ring member at said leading edge greater than the inside diameter of said ring member at said trailing edge.
4. The device as claimed in claim 1 wherein said ring member and said flange are formed from a flexibly resilient material.
5. The device as claimed in claim 1 wherein said ring member and said flange are formed from plastic, silicone, polyolefin, polyethylene, polypropylene, a thermoplastic elastomer, or rubber.
6. The device as claimed in claim 2 wherein the interior diameter of said leading edge of said ring member is greater than the exterior diameter of said conduit.
7. The device as claimed in claim 6 wherein the interior diameter of said trailing edge of said ring member is less than or equal to the exterior diameter of said conduit, said ring member and said flange deflected when said conduit passes through said ring member, said deflection of said ring member and said flange biasing the interior face of said ring member against the exterior surface of said conduit.
8. The device as claimed in claim 1 wherein said fluid filtering cartridge further includes a cap positioned on the exterior surface of said body of filtering media and about said opening therethrough, said cap including a cylindrical tube received within said opening, said flange of said sealing element connected to the internal surface of said cylindrical tube such that said sealing element presents a fluid-tight seal between the interior surface of said cylindrical tube and the exterior of said conduit when said conduit is received through said cylindrical tube.
9. A filter cartridge for the removal of contaminants from a stream of fluid, said cartridge comprising;
(i) a filter element including a body of filtering media and having a generally hollow interior in fluid communication with an opening extending through said filtering media,
(ii) a cylindrical tube fixedly received within said opening, said cylindrical tube having an exterior and an interior surface; and,
(iii) a sealing element situated within said cylindrical tube, said sealing element comprising a radially inwardly directed flange intersecting and connected to the interior surface of said cylindrical tube, said flange having an inwardly disposed edge with a ring member secured thereto, said ring member having an interior face sealingly receivable about the exterior surface of a conduit inserted through said cylindrical tube to present a fluid-tight seal between the interior surface of said cylindrical tube and the exterior surface of said conduit.
10. The device as claimed in claim 9 wherein said ring member has a leading edge directed outwardly from said hollow interior of said filtering media and a trailing edge directed toward said hollow interior of said filtering media.
11. The device as claimed in claim 10 wherein said ring member is frustoconical in shape with the internal diameter of said leading edge greater than the internal diameter of said trailing edge.
12. The device as claimed in claim 9 wherein said ring member and said flange are formed from a flexibly resilient material.
13. The device as claimed in claim 9 wherein said ring member and said flange are formed from plastic, silicone, polyolefin, polyethylene, polypropylene, a thermoplastic elastomer, or rubber.
14. The device as claimed in claim 9 wherein said cylindrical tube, said flange and said ring member are of unitary construction and formed from a flexibly resilient material.
15. The device as claimed in claim 11 wherein the diameter of said leading edge is greater than the diameter of said conduit received through said cylindrical tube.
16. The device as claimed in claim 15 wherein the interior diameter of said trailing edge of said ring member is less than or equal to the exterior diameter of said conduit, said ring member and said flange deflected when said conduit passes through said sealing element, said deflection of said ring member and said flange biasing the interior face of said ring member against the exterior surface of said conduit.
17. A sealing element for sealingly engaging the exterior surface of a generally cylindrical body, the sealing element comprising a radially inward directed flange having an inwardly disposed edge with a ring member secured thereto, said ring member having an interior face sealingly receivable about the exterior surface of the generally cylindrical body received through said sealing element, said ring member having a leading edge and a trailing edge, said leading and said trailing edges directed outwardly from said flange, said ring member generally frustoconical in shape with the internal opening through said ring member at said leading edge greater than the internal opening through said ring member at said trailing edge.
18. The device as claimed in claim 17 wherein said ring member and said flange are formed from a flexibly resilient material.
19. The device as claimed in claim 17 wherein said ring member and said flange are formed from plastic, silicone, polyolefin polyethylene, polyproprelyne, thermal plastic elastomer, or rubber.
20. The device as claimed in claim 17 wherein the size of the interior opening through said ring member at said trailing edge is less than the size of the cross section of the generally cylindrical body received therethrough.
21. A sealing element for sealingly engaging the interior surface of a bore, said sealing element secured to the exterior surface of an elongate member receivable within said bore and sealing between the exterior surface of said elongate member and the interior surface of said bore upon the receipt of the elongate member therein, the sealing element comprising a radially outward directed flange having an outwardly disposed edge with a ring member secured thereto, said ring member having an exterior face sealingly received against the interior surface of said bore when the elongate member is received therein, said ring member having a leading edge and a trailing edge and being generally frustoconical in shape with said ring member being larger at said trailing edge than at said leading edge.
22. The device as claimed in claim 21 wherein said ring member and said flange are formed from a flexibly resilient material.
23. The device as claimed in claim 21 wherein said ring member and said flange are formed from plastic, silicone, polyolefin, polyethylene, polypropylene, thermoplastic elastomer, or rubber.
24. The device as claimed in claim 21 wherein said ring member, at its trailing edge, is greater in size than the size of the cross section of said bore.
25. The device as claimed in claim 21 wherein said flange includes an inwardly disposed edge received within a complimentary shaped channel in the exterior surface of said elongate member.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
What is claimed is:
1. A series-wound motor comprising:
an armature including a commutating armature coil;
a stator forming a closed yoke within which said armature is mounted rotatably, said stator having first and second axial ends;
brushes connectable to a voltage source for sliding contact with said armature coil;
at least two field poles provided on said stator, each said field pole comprising a center section being integral with said closed yoke and further comprising two pole horns extending circumferentially from said center section and defining first and second axial grooves extending between said closed yoke and said pole horns;
at least two field coils attached to said stator, each said field coil having two axial ends and two lateral parts extending between said axial ends, each said field coil being received with its lateral parts within said axial grooves and protruding with its axial ends beyond said first and second axial ends of said stator;
wherein at least one of said pole horns comprises at least a first protrusion protruding circumferentially from an axial edge of said pole horn and a second protrusion protruding circumferentially from said axial edge of said pole horn.
2. The series-wound motor of claim 1, wherein each one of said pole horns comprises at least a first protrusion protruding circumferentially from an axial edge of said pole horn and a second protrusion protruding circumferentially from said axial edge of said pole horn.
3. The series-wound motor of claim 2, wherein each said field coil is configured as a preformed winding, and wherein said lateral parts of said field coils are retained within said axial grooves of said stator by said first and second protrusions.
4. The series-wound motor of claim 3, wherein said first and second protrusions are arranged at said first and second axial ends of said stator.
5. The series-wound motor of claim 2, wherein each said pole horn comprises at least a third protrusion protruding circumferentially from said axial edge of said pole horn.
6. The series-wound motor of claim 2, further comprising switching means for switching between a first rotating direction of said armature and between a second rotating direction of said armature.
7. A series-wound motor having a preferred rotary direction, said motor comprising:
an armature including a commutating armature coil;
a stator forming a closed yoke within which said armature is mounted rotatably, said stator having first and second axial ends;
brushes connectable to a voltage source for sliding contact with said armature coil;
at least two field poles provided on said stator, each said field pole comprising a center section being integral with said closed yoke and further comprising two pole horns extending circumferentially from said center section and defining first and second axial grooves extending between said closed yoke and said pole horns, one of said pole horns extending from said center section contrary to said preferred rotary direction and ending in a run-on edge, another one of said pole horns extending from said center section in said preferred rotary direction and ending in a run-off edge;
at least two field coils connected in series;
switching means for switching said motor between a motor operation mode and a braking mode, wherein, when being in said motor operation mode, said field coils are connected in series with said armature coil in a motor circuit fed by said voltage source, and wherein, when being in said braking mode, said field coils form a closed brake circuit with said armature coil being separated from said voltage source;
wherein said run-off edges of said pole horns each comprise at least first and second protrusions extending circumferentially from said run-off edge.
8. The motor of claim 7, wherein said first and second protrusions are configured as tongues extending circumferentially and defining cutout sections therebetween.
9. The motor of claim 8, wherein each said run-off edge at said cutout section has a smaller distance in circumferential direction from a center of said center section than has said run-on edge from said center.
10. The series-wound motor of claim 7, wherein each said field coil is configured as a preformed winding comprising two axial ends and two lateral parts extending therebetween, and wherein said lateral parts of said field coils are retained within said axial grooves of said stator by said first and second protrusions.
11. The series-wound motor of claim 7, wherein said first and second protrusions are arranged at said first and second axial ends of said stator.
12. The series-wound motor of claim 7, wherein each said pole horn comprises at least a third protrusion protruding circumferentially from said axial edge of said pole horn.
13. The series-wound motor of claim 7, wherein said stator comprises a geometric neutral zone, said commutating armature coil being displaced with respect to said geometric neutral zone counter to the preferred rotary direction.
14. The motor of claim 7, wherein said run-on edges of said pole horns each comprise at least two protrusions extending circumferentially from said run-on edge.
15. The motor of claim 7, further comprising means for restricting the current flowing in the brake mode within said brake circuit.
16. The motor of claim 15, further comprising a transformer having a primary winding and a secondary winding, said primary winding being fed by an alternating voltage source also feeding the motor when being in operating mode, said secondary winding being connected in parallel with the field coils in the brake circuit, when being in braking mode, and further comprising an electronic control switch for controlling the current flowing in the brake circuit across the armature coil and the field coil.
17. The motor of claim 16, wherein the control switch is a field effect transistor having a source, a drain and a gate, said field effect transistor being coupled in parallel with its source and its drain to the series-connected field coils via a diode and regulating the current through the field coils depending on the current flowing across the armature coil.
18. The motor of claim 16, wherein the secondary winding is connected in parallel with the series-connected field coils in the brake circuit via a rectifier.
19. The motor of claim 17, wherein the field effect transistor in the brake circuit is connected with its gate to the brushes via a voltage divider.
20. The motor of claim 19, further comprising a load resistor being connected in the brake circuit between one of said brushes and one end of the series-connected field coils via a diode, wherein the drain of the field effect transistor is connected to one end of the load resistor, and wherein the source of the field effect transistor is connected to another one of said brushes and another end of the series-connected field coils.
21. A series-wound motor having a preferred rotary direction, said motor comprising:
an armature including a commutating armature coil;
a stator within which said armature is mounted rotatably;
brushes connectable to a voltage source for sliding contact with said armature coil;
at least two field poles provided on said stator, each said field pole comprising a center section being integral with said closed yoke and further comprising two pole horns extending circumferentially from said center section and defining first and second axial grooves extending between said closed yoke and said pole horns, one of said pole horns extending from said center section contrary to said preferred rotary direction and ending in a run-on edge, another one of said pole horns extending from said center section in said preferred rotary direction and ending in a run-off edge;
at least two field coils connected in series;
switching means for switching said motor between a motor operation mode and a braking mode, wherein, when being in said motor operation mode, said field coils are connected in series with said armature coil in a motor circuit fed by said voltage source, and wherein, when being in said braking mode, said field coils form a closed brake circuit with said armature coil being separated from said voltage source;
wherein said run-off edges of said pole horns each have a smaller distance in circumferential direction from said center line than have said run-on edges from said center line.
22. The motor of claim 21, wherein said run-off edges of said pole horns each comprise at least two protrusions extending in circumferential direction, between which a cutout section is formed.
23. The motor of claim 21, wherein the stator comprises a geometric neutral zone, said commutating armature coil being displaced with respect to said geometric neutral zone counter to the preferred rotary direction.
24. The motor of claim 21, further comprising means for restricting the current flowing in the brake mode within said brake circuit.
25. The motor of claim 24, further comprising a transformer having a primary winding and a secondary winding, said primary winding being fed by an alternating voltage source also feeding the motor when being in operating mode, said secondary winding being connected in parallel with said series-connected field coils in the brake circuit, when being in braking mode, and further comprising an electronic control switch for controlling the current flowing in the brake circuit across the armature coil and the field coils.
26. The motor of claim 25, wherein the control switch is a field effect transistor having a source, a drain and a gate, said field effect transistor being coupled in parallel with its source and its drain to the series-connected field coils via a diode and regulating the current through the series-connected field coils depending on the current flowing across the armature coil.
27. The motor of claim 25, wherein the secondary winding is connected in parallel with the series-connected field coils in the brake circuit via a rectifier.
28. The motor of claim 26, wherein the field effect transistor in the brake circuit is connected with its gate to the brushes via a voltage divider.
29. The motor of claim 28, further comprising a load resistor being connected in the brake circuit between one of said brushes and one end of the series-connected field coils via a diode, wherein the drain of the field effect transistor is connected to one end of the load resistor, and wherein the source of the field effect transistor is connected to another one of said brush and another end of the series-connected field coils.
30. The motor of claim 15, further comprising a transformer having a primary winding and a secondary winding, said primary winding being fed by an alternating voltage source also feeding the motor when being in operating mode, said secondary winding being connected via a rectifier circuit in parallel with the series-connected field coils in the brake circuit, when being in braking mode, and further comprising an electronic control switch for controlling the current flowing in the brake circuit across the armature coil and the series-connected field coils.
31. The motor of claim 30, wherein the control switch is a field effect transistor having a source, a drain and a gate, said field effect transistor being coupled in parallel with its source and its drain to the series-connected field coils and regulating the current through the series-connected field coils depending on the current flowing across the armature coil.
32. The motor of claim 31, further comprising a bridge rectifier, said bridge rectifier having A.C. input ends being coupled to the secondary winding and having D.C. output ends being connected in parallel with the field coils in the brake circuit, wherein a positive voltage output end of said bridge rectifier is coupled to the drain of said field effect transistor, and wherein a negative voltage output end of said bridge rectifier is coupled to the source of said field effect transistor.
33. The motor of claim 31, wherein the field effect transistor in the brake circuit is connected with its gate to the brushes via a voltage divider.
34. A series-wound motor having a preferred rotary direction, said motor comprising:
an armature including a commutating armature coil;
a stator forming a closed yoke within which said armature is mounted rotatably;
brushes connectable to a voltage source for sliding contact with said armature coil;
at least two field coils connected in series;
switching means for switching said motor between a motor operation mode and a braking mode, wherein, when being in said motor operation mode, said field coils are connected in series with said armature coil in a motor circuit fed by said voltage source, and wherein, when being in said braking mode, said field coils form a closed brake circuit with said armature coil being separated from said voltage source;
a transformer having a primary winding and a secondary winding, said primary winding being fed by an alternating voltage source also feeding the motor when being in operating mode, said secondary winding being connected in parallel with said series-connected field coils in the brake circuit, when being in braking mode, and further comprising an electronic control switch for controlling the current flowing in the brake circuit across said armature coil and said series-connected field coils.
35. The motor of claim 34, wherein the control switch is a field effect transistor having a source, a drain and a gate, said field effect transistor being coupled in parallel with its source and its drain to one of the series-connected field coils and regulating the current through said series-connected field coils depending on the current flowing across the armature coil.
36. The motor of claim 35, further comprising a bridge rectifier, said bridge rectifier having A.C. input ends being coupled to the secondary winding and having D.C. output ends being connected in parallel with the series-connected field coils in the brake circuit, wherein a positive voltage output end of said bridge rectifier is coupled to the drain of said field effect transistor, and wherein a negative voltage output end of said bridge rectifier is coupled to the source of said field effect transistor.
37. The motor of claim 36, wherein the field effect transistor in the brake circuit is connected with its gate to the brushes via a voltage divider.