US3853429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor pump combination
Assignee: Individual
•
Filing: 1973-06-28
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Granted: 1974-12-10
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Expires: 1993-06-28
Abstract
Abstract To permit submerged operation, the motor is formed as a synchronous motor, in which a coil is totally encapsulated in plastic material, the coil being toroidal and having end ferromagnetic disks above and below the coil, the disks being alternately supplied with inner pole faces, in the form of sections or strips of a cylinder, defining a cylindrical space within which a permanent magnet rotor can rotate. The cylindrical strips are formed with cut-outs, so that the magnetic field will be unsymmetrical, thus establishing a rotating field. The pole faces are separated from the rotor by plastic material, the rotor being integrally connected to the hub of an impeller for the pump.
Inventors
- 👤 W Wiedenmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:54
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/04; F04D29/046; F04D29/047; A; A01; A01K; A01K63/00; A01K63/04; A01K63/047; F04D13/00; F04D13/02; F04D13/06; F04D13/0606; F04D13/0633; F04D13/064; F04D29/18; F04D29/22; F04D29/24; F04D29/247; H; H02; H02K; H02K21/00; H02K21/12; H02K21/14; H02K21/145; H02K5/00; H02K5/04; H02K5/12; H02K5/128; H02K5/1285; H02K2201/00; H02K2201/12
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
245 words
Motor-pump combination comprising a plastic housing having one portion (6) in which the motor is located and another portion (33) in which the pump is located; a pump impeller (3) in the pump portion coupled to the rotor (4) of the motor (1), wherein said motor is a self-starting synchronous motor, and the rotor (4) is a permanent magnet rotor; the motor portion of the housing being formed in cup-shaped configuration having an inner sleeve (7) closely surrounding the rotor and leaving an air gap therebetween; bearing means (8, 30, 29, 28; 27, 32) journalling the rotor in the sleeve to permit rotation of the rotor relative to the sleeve; a stator (5) having a stator winding (19) therein, a pair of disks (12) of magnetizable material located at the end faces of the winding, an outer sleeve (10) of magnetic material surrounding the winding and being in magnetic flux transfer with said disks; and inner pole shoes (14) of asymmetrically shaped cylindrically bowed strips, alternately connected in flux transfer to one and the other of said disks (12) and facing the outer wall of said inner cylindrical sleeve (7) of plastic material to permit interaction of the permanent magnet rotor, through the plastoc material, with the rotational field generated by the asymmetric pole shoes, alternately connected to one and the other of said end disks (12), and to provide for self-starting operation of the motor and synchronous operation after synchronous speed has been reached.
Claim 2
Dependent Claim
245 words
Motor-pump combination comprising a plastic housing having one portion (6) in which the motor is located and another portion (33) in which the pump is located; a pump impeller (3) in the pump portion coupled to the rotor (4) of the motor (1), wherein said motor is a self-starting synchronous motor, and the rotor (4) is a permanent magnet rotor; the motor portion of the housing being formed in cup-shaped configuration having an inner sleeve (7) closely surrounding the rotor and leaving an air gap therebetween; bearing means (8, 30, 29, 28; 27, 32) journalling the rotor in the sleeve to permit rotation of the rotor relative to the sleeve; a stator (5) having a stator winding (19) therein, a pair of disks (12) of magnetizable material located at the end faces of the winding, an outer sleeve (10) of magnetic material surrounding the winding and being in magnetic flux transfer with said disks; and inner pole shoes (14) of asymmetrically shaped cylindrically bowed strips, alternately connected in flux transfer to one and the other of said disks (12) and facing the outer wall of said inner cylindrical sleeve (7) of plastic material to permit interaction of the permanent magnet rotor, through the plastoc material, with the rotational field generated by the asymmetric pole shoes, alternately connected to one and the other of said end disks (12), and to provide for self-starting operation of the motor and synchronous operation after synchronous speed has been reached.
Claim 3
Dependent Claim
57 words
Combination according to claim 1, wherein the pole shoes (14) are shaped strips of cylindrical segments, each strip being formed with a cut-out (17) at the side remote from the side connected to the associated end disk (12), said cutout extending both over the side (15) of the strip as well as over the end (16) thereof.
Claim 4
Dependent Claim
67 words
Combination according to claim 1, further comprising a coil form (18), the coil (19) being a toroidal coil, and surrounding said sleeve (7) of plastic material from the outside thereof, said coil form being formed with recesses (20) shaped similarly to the shape of said pole shoes (14) to locate the pole shoes therein and hold the pole shoes in position with respect to the stator (5).
Claim 5
Dependent Claim
38 words
Combination according to claim 3, wherein the coil form is formed with axially extending limit strips (21) adjacent the recesses (20) and defining the edges of the recesses to locate the pole shoes (14) in position and alignment.
Claim 6
Dependent Claim
39 words
Combination according to claim 3, wherein the end disks (12) are formed with notches (25) and the coil form is formed with matching projections (23) to secure the disks in position and alignment with respect to the coil (19).
Claim 7
Dependent Claim
34 words
Combination according to claim 1, wherein the stator comprises a stator assembly (5) including a stator winding and the pole shoes (14), the assembly being encapsulated in the housing by a plastic casting mass.
Claim 8
Dependent Claim
62 words
Combination according to claim 1, wherein the rotor (4) comprises a rotor shaft (26,29), a pair of holding bushings (30), each being elastically secured in the housing, said sleeve (7) being formed with a bottom wall, one bearing bushing being located in the bottom wall of the sleeve, and the other bearing bushing being located in the pump portion of the housing.
Claim 9
Dependent Claim
33 words
Combination according to claim 7, wherein the rotor shaft supports the rotor (4) and the pump impeller (3) and the elastic bearing bushings of the shaft of the rotor comprise rubber bushings (30).
Claim 10
Dependent Claim
40 words
Combination according to claim 7, wherein the bearing bushings are rubber bushings fitted in respective housing portions, the housing portions and the rubber bushings being formed with matching shoulders and slots (35, 36) to locate the bushings in the housing.
Claim 11
Dependent Claim
41 words
Combination according to claim 7, wherein at least one of the bushings is closed at the end to form the end closure of said combination and comprises a projecting tip (34) to provide a gripping surface for seating of the bushing.
Claim 12
Dependent Claim
44 words
Combination according to claim 1, wherein the impeller (3) has a cylindrical hub (26) and impeller blades (37) secured to the hub and swingably mounted therein to swing over a restricted arc about an axis parallel to the axis of rotation of the impeller.
Claim 13
Dependent Claim
45 words
Combination according to claim 11, wherein the hub (26) is formed with a pair of inner, cylindrical sleeves (27,28) forming bearing bushings, a central stationary shaft is provided located In the housing and the hub is rotatably journalled on said shaft by said cylindrical sleeves.
Claim 14
Dependent Claim
14 words
Combination according to claim 11, wherein the impeller blades (37) are of elastic material.
Claim 15
Dependent Claim
53 words
Combination according to claim 11, wherein the hub is formed with cylindrical, axially extending holes (39) and passages open to the outer circumference; the impeller blades (37) are formed with cylindrical end projections (38) fitting into the cylindrical holes; and a closure element (40) is provided retaining the end projection in the holes.
Claim 16
Dependent Claim
20 words
Combination according to claim 14, wherein the closure element is an end face disk (40) located on the hub (26).
Claim 17
Dependent Claim
83 words
Combination according to claim 11, wherein the pump portion of the housing (33) is shaped to define a pump chamber (2), said impeller (3) being rotatably positioned in said chamber; and said pump chamber is formed with three symmetrically located outlet openings (45) and an inlet stub (46) is provided on the pump portion of the housing (33), located coaxially to the axis of rotation (9) of the pump; and a bearing spider (47) securing the shaft in position within the inlet stub.
Claim 18
Dependent Claim
33 words
Combination according to claim 7, wherein the shaft (29) is stationary, an elongated sleeve (26) connecting the pump impeller (3) and the rotor (4) and surrounding said shaft (29) and being journalled thereon.
Claim 19
Dependent Claim
54 words
Combination according to claim 17, wherein the sleeve (26) and the shaft (29) are connected by axially unrestrained bearings (27, 28), the alignment of the rotor (4) and the impeller (3) being obtained by magnetic force due to interaction of the permanent magnetism of the rotor and the pole shoes (14) of the stator.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |