US3908141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Eddy current retarder
Assignee: Labavia SGE SARL
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Filing: 1974-10-15
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Granted: 1975-09-23
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Expires: 1994-10-15
Abstract
Abstract An eddy current retarder assembly comprises a field stator secured to a motor vehicle transmission casing and a rotor comprising at least one annular armature of ferromagnetic material situated on one side of the stator. The rotor comprises an annular hub bolted to a fixing plate rotatable with a shaft end emerging from the casing. The fixing plate is connected to one jaw of a vehicle transmission universal joint which comprises two joints and a spider havingopposed trunnions, the one jaw carrying a fixing flange and the spider being housed inside the rotor. The one jaw of the universal joint comprises a first part which carries the fixing flange and is made in one piece with the fixing plate, a second part of the one jaw at least partly forming two bearings for the trunnions of the spider and being secured by locking bolts against the first part of the one jaw.
Inventors
- 👤 Daniel Claude Lemonnier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:55
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/02; H02K49/04; H02K49/046
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
183 words
An eddy current retarder assembly comprising: a motor vehicle transmission casing; a shaft end emerging from said casing; a vehicle transmission universal joint coupled to said shaft end; said universal joint comprising two jaws and a a spider having opposed trunnions; a fixing flange on one of said jaws of said universal joint; a fixing plate associated with said shaft end and connected to said one jaw; a field stator; means provided on said stator for fixing said stator to said casing; a rotor comprising at least one annular armature of ferromagnetic material situated on one side of said stator; and an annular hub on said stator secured to said fixing plate; said assembly being characterised by: said one jaw comprising a first part having said fixing flange and a second part which at least partly forms two bearings for said opposed trunnions of said spider; said fixing plate and said first part of said one jaw being made in one piece; and said second part of said one jaw being secured against said first part of said one jaw by locking bolts.
Claim 2
Dependent Claim
183 words
An eddy current retarder assembly comprising: a motor vehicle transmission casing; a shaft end emerging from said casing; a vehicle transmission universal joint coupled to said shaft end; said universal joint comprising two jaws and a a spider having opposed trunnions; a fixing flange on one of said jaws of said universal joint; a fixing plate associated with said shaft end and connected to said one jaw; a field stator; means provided on said stator for fixing said stator to said casing; a rotor comprising at least one annular armature of ferromagnetic material situated on one side of said stator; and an annular hub on said stator secured to said fixing plate; said assembly being characterised by: said one jaw comprising a first part having said fixing flange and a second part which at least partly forms two bearings for said opposed trunnions of said spider; said fixing plate and said first part of said one jaw being made in one piece; and said second part of said one jaw being secured against said first part of said one jaw by locking bolts.
Claim 3
Dependent Claim
73 words
A retarder assembly as claimed in claim 1 comprising: an end flange formed on said shaft end and provided with screwthreaded holes; and fixing bolts to secure said fixing plate to said end flange; said fixing plate being formed with axial holes therethrough for the passage of said fixing bolts; said locking bolts and said fixing bolts of said one jaw having screwthreaded ends received in said screwthreaded holes of said end flange.
Claim 4
Dependent Claim
34 words
A retarder assembly as claimed in claim 2, wehrein said axial holes for the passage of said fixing and locking bolts are distributed over a circle having the axis of the retarder as centre.
Claim 5
Dependent Claim
28 words
A retarder assembly as claimed in claim 1, wherein said first part of said one jaw, said fixing plate and said shaft end are integral with one another.
Claim 6
Dependent Claim
33 words
A retarder assembly as claimed in claim 1, wherein said bearings for said trunnions are capped bearings having caps secured by said locking bolts directly on said first part of said one jaw.
Claim 7
Dependent Claim
21 words
A retarder assembly as claimed in claim 1, wherein each of said bearings for said trunnions is made in one piece.
Claim 8
Dependent Claim
57 words
A retarder assembly as claimed in claim 6, wherein said first and second parts of said one jaw have mating junction surfaces at each bearing, said junction surface respectively having matching projecting and hollow parts fitted one inside the other and so disposed as to transmit most of the transmission torque between said first and second parts.
Claim 9
Dependent Claim
43 words
A retarder assembly as claimed in claim 7, wherein said projecting part is formed by a rectangular lug connected to the corresponding bearing in said second part and said hollow part is formed by a matching rectangular recess in the said first part.
Claim 10
Dependent Claim
40 words
A retarder assembly as claimed in claim 1, wherein said spider is housed inside saId rotor and said locking bolts have their axes disposed on either side of and well outside the other of said jaws of said universal joint.
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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |