Patent US4584496A successfully refreshed from Google Patents.
US4584496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internally force-ventilated claw-pole alternator, particularly for automotive use
Assignee: Robert Bosch GmbH
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Filing: 1985-01-22
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Granted: 1986-04-22
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Expires: 2005-01-22
Abstract
Abstract To counteract the effects of centrifugal force on internal blades or vanes positioned in gaps (31) between adjacent claws (22, 23) of a claw-pole rotor (R) of a claw-pole alternator, a plastic sleeve (33) is fitted over the field winding (20) and has cooling fins or vanes or blades (32) projecting radially therefrom, at an inclination with respect to the axis of rotation of the rotor, and located between the inclined faces of the claw poles. The end portions (36, 37) projecting beyond the sleeve may be straight (FIG. 4) or the end portions (38, 39) may be curved (FIG. 5). Preferably, a curable casting compound is cast within the sleeve and secures the winding (20) in position, the sleeve being fitted in form of a circular bandage over the winding.
Inventors
- 👤 Manfred Frister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:49
CPC Classifications
H; H02; H02K; H02K1/00; H02K1/06; H02K1/22; H02K1/32; H02K1/325; H02K3/00; H02K3/46; H02K3/52; H02K3/527; H02K3/528; H02K9/00; H02K9/02; H02K9/04; H02K9/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
144 words
Internally force-ventilated claw-pole alternator, particularly vehicular-type alternator, having a stator (10, 11); a rotor (R) rotatably retained for rotation within the stator, said rotor including a rotor shaft (14), a core (17), a winding (20) surrounding the core, two pole plates (18, 19) axially spaced from each other and engaging respective axial ends of the core, and interdigited claw poles (22, 23) extending axially towards each other from said pole plates, and leaving gaps (31) between adjacent pole plates; and cooling blades (32) located in at least some of the gaps (31) and extending at an angle with respect to the axis of rotation of the rotor, and comprising, in accordance with the invention, a plastic sleeve (33) located beneath the claw poles (22, 23) of the rotor and having said blades (32) projecting radially outwardly therefrom, said blades being unitary with said sleeve.
Claim 2
Dependent Claim
144 words
Internally force-ventilated claw-pole alternator, particularly vehicular-type alternator, having a stator (10, 11); a rotor (R) rotatably retained for rotation within the stator, said rotor including a rotor shaft (14), a core (17), a winding (20) surrounding the core, two pole plates (18, 19) axially spaced from each other and engaging respective axial ends of the core, and interdigited claw poles (22, 23) extending axially towards each other from said pole plates, and leaving gaps (31) between adjacent pole plates; and cooling blades (32) located in at least some of the gaps (31) and extending at an angle with respect to the axis of rotation of the rotor, and comprising, in accordance with the invention, a plastic sleeve (33) located beneath the claw poles (22, 23) of the rotor and having said blades (32) projecting radially outwardly therefrom, said blades being unitary with said sleeve.
Claim 3
Dependent Claim
18 words
Alternator according to claim 1, wherein the sleeve (33) is placed over and first around the winding (20).
Claim 4
Dependent Claim
23 words
Alternator according to claim 2, wherein the sleeve fits snugly around the winding and holds the outer portions of the winding in place.
Claim 5
Dependent Claim
27 words
Alternator according to claim 2, further including a hardenable or curable casting compound introduced beneath said sleeve and filling spaces between the winding (20) and said sleeve.
Claim 6
Dependent Claim
33 words
Alternator according to claim 1, wherein the blades (32) are unitary elements extending from one axial end surface (34) of the claw-pole rotor (R) to another axial end surface (35) of the rotor.
Claim 7
Dependent Claim
26 words
Alternator according to claim 5, wherein the blades have end portions (36, 37; 38, 39) which extend, axially, beyond the axial extent of said sleeve (33).
Claim 8
Dependent Claim
32 words
Alternator according to claim 6, wherein the axial end portions (36, 37) of the blades (32) are located in a plane which is common with a central portion of the sleeve (33).
Claim 9
Dependent Claim
17 words
Alternator according to claim 6, wherein the end portions (38, 39) of the blades (32) are curved.
Claim 10
Dependent Claim
27 words
Alternator according to claim 7, further including a hardenable or curable casting compound introduced beneath said sleeve and filling spaces between the winding (20) and said sleeve.
Claim 11
Dependent Claim
27 words
Alternator according to claim 8, further including a hardenable or curable casting compound introduced beneath said sleeve and filling spaces between the winding (20) and said sleeve.
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) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |