US3553507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retarders
Assignee: Labavia SGE SARL
•
Filing: 1969-02-12
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Granted: 1971-01-05
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Expires: 1989-02-12
Abstract
Abstract The retarder is self-contained and comprises a stator including an annular portion interposed between two rotor elements of a rotor fixed to a shaft rotatably mounted within a bore in a central portion of the stator by taper roller bearings adjacent opposite ends of the bore. The central portion of the stator is recessed with respect to the annular portion. Transmission coupling means lie in this recess and are connected to the adjacent rotor element by one or more members bent into the recess in the stator to define a corresponding recess in the rotor to accommodate part of a transmission connected to these coupling means.
Inventors
- 👤 Pierre Etienne Bessiere
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:29
CPC Classifications
B; B60; B60J; B60J3/00; B60J3/02; F; F16; F16D; F16D51/00; F16D55/00; F16D65/00; F16D65/78; F16D65/84; F16D65/847; H; H02; H02K; H02K49/00; H02K49/02; H02K49/04; H02K49/043; H02K49/046; F16D2121/00; F16D2121/18; F16D2121/20
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
207 words
A self-contained retarder comprising: a stator having a bore in a central portion thereof and including an annular portion; taper roller bearings adjacent opposite ends of said bore; a shaft rotatably mounted within said bore by means of said taper roller bearings; the rollers of each bearing having their rotary axes inclined towards the rotary axis of said shaft towards the other bearing; a rotor fixed to said shaft and having two rotor elements disposed axially on opposite sides of said stator annular portion; said central portion of the stator having at least one axially extreme end offset axially inwardly from the position of the adjacent axial end of said annular portion to provide a central recess at the corresponding end of the stator; coupling means on opposite ends of said shaft for connection to a transmission, the coupling means adjacent said end of the stator lying within said recess; and at least one connecting member connecting the coupling means lying within said recess to the rotor element adjacent said end of the stator, said at least one connecting member being bent into said recess in the stator to define a corresponding recess in the rotor to accommodate part of a transmission connected to said coupling means.
Claim 2
Dependent Claim
207 words
A self-contained retarder comprising: a stator having a bore in a central portion thereof and including an annular portion; taper roller bearings adjacent opposite ends of said bore; a shaft rotatably mounted within said bore by means of said taper roller bearings; the rollers of each bearing having their rotary axes inclined towards the rotary axis of said shaft towards the other bearing; a rotor fixed to said shaft and having two rotor elements disposed axially on opposite sides of said stator annular portion; said central portion of the stator having at least one axially extreme end offset axially inwardly from the position of the adjacent axial end of said annular portion to provide a central recess at the corresponding end of the stator; coupling means on opposite ends of said shaft for connection to a transmission, the coupling means adjacent said end of the stator lying within said recess; and at least one connecting member connecting the coupling means lying within said recess to the rotor element adjacent said end of the stator, said at least one connecting member being bent into said recess in the stator to define a corresponding recess in the rotor to accommodate part of a transmission connected to said coupling means.
Claim 3
Dependent Claim
36 words
A self-contained retarder as claimed in claim 1 in the form of an eddy current retarder, said annular portion of the stator comprising an electromagnetic inductor for producing, when activated, eddy currents in said rotor elements.
Claim 4
Dependent Claim
51 words
A self-contained retarder as claimed in claim 2 wherein said inductor comprises a plurality of electromagnets disposed regularly about the axis of said shaft with sets of poles at axially extreme ends of said annular portion and said rotor elements each comprise an annular disc opposed to one set of poles.
Claim 5
Dependent Claim
61 words
A self-contained retarder as claimed in claim 3 wherein said inductor comprises two annular coils Coaxial with said shaft and each accommodated in an annular recess in the stator defined between a plurality of overlapping pole fingers on the outer circumference of said annular member, and said rotor elements each comprise a cylindrical band encircling the annular portion of the stator.
Claim 6
Dependent Claim
55 words
A self-contained retarder as claimed in claim 1 wherein the coupling means adjacent said end of the stator comprises a member of diameter greater than said bore said at least one connecting member connecting the rotor elements to said coupling means being attached to said coupling member at positions outwith the diameter of said bore.
Claim 7
Dependent Claim
31 words
A self-contained retarder as claimed in claim 1 in which the axial length of said bore is substantially equal to the sum of the axial lengths of said taper roller bearings.
Claim 8
Dependent Claim
83 words
A self-containing retarder as claimed in claim 1, in which said coupling member comprises a plate fixed to one end of said shaft substantially in the central plane of said annular portion, both rotor elements being attached to said plate by similar connecting members, to define a similar recess at opposite ends of the rotor, said bore in the stator being formed by a bush extending into one of said recesses and the other of said recesses being arranged to accommodate a transmission.
Claim 9
Dependent Claim
33 words
A self-contained retarder as claimed in claim 7, in which said bush is integral with a support extending around the adjacent rotor element which support also supports said annular portion of the stator.
Claim 10
Dependent Claim
69 words
A self-contained retarder as claimed in claim 7, in which the rotor shaft is formed by a tubular member rigidly connected with two plugs each of which extend into the tubular member from one end thereof, one of the plugs supporting said coupling plate at its end extending beyond the tubular member while the other plug supports a further coupling plate at its end extending beyond the tubular member.
Claim 11
Dependent Claim
125 words
A self-contained retarder as claimed in claim 2, wherein the stator comprises two such annular portions mounted coaxially and each providing such a recess at one end of the stator and each arranged between a corresponding pair of rotor elements, the rotor elements of each pair being connected by similar connecting members to a plate which is substantially in the central plane of the corresponding annular portion of the stator and is attached at one end of a common shaft which is supported by said central portion of the stator, which extends radially between the two annular portions of the stator, the arrangement being such that a corresponding recess for the accommodation of part of a transmission is formed at both ends of the retarder.
Claim 12
Dependent Claim
75 words
A self-contained retarder as claimed in claim 10, in which the central portion of the stator comprises two substantially radial walls spaced apart axially and which are formed with apertures so that the rotor elements, which are disposed on either side of said central portion and have cooling and ventilating fins, can suck air from the gap between the two walls, this gap communicating with the ambient air at the periphery of said central portion.
Claim 13
Dependent Claim
43 words
A self-contained retarder as claimed in claim 11, in which curved vanes are disposed between the walls of the central portion and are arranged to impart rotation to the air which is sucked into the space between the walls of the central portion.
Claim 14
Dependent Claim
33 words
A self-contained retarder as claimed in claim 12, in which the vanes and the fins have curvature such that their convex sides are directed away from the direction of rotation of the rotor.
Claim 15
Dependent Claim
34 words
A self-contained retarder claimed in claim 7, in which said coupling plate is dished so that the outer edge of the plate is displaced axially inwardly with respect to the center of the plate.
Claim 16
Dependent Claim
41 words
A self-contained retarder as claimed in claim 1, in which said corresponding recess in the rotor is large enough to accommodate at least one universal joint member, and a coupling plate unitary with the retarder shaft and comprising said coupling means.
References Cited (Backward Citations)
US2745974A
Cited
US2830206A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |