Patent US3688884A successfully refreshed from Google Patents.
US3688884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Viscosity coupling, especially for coupling a fan to its drive in an internal combustion engine
Assignee: Daimler Benz AG
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Filing: 1970-12-04
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Granted: 1972-09-05
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Expires: 1990-12-04
Abstract
Abstract A viscosity coupling, particularly for the coupling of a fan with its drive in an internal combustion engine, which has a working space that includes entrainment surfaces which are disposed opposite one another at slight distances and are provided at the two parts to be coupled with one another; the working space is connected by way of one or several openings with a reservoir space for the viscosity liquid, from which the liquid is fed to the working space as a function of an adjusting magnitude; an intermediate chamber is arranged between the working space and the reservoir space, in which terminates the feed line from the reservoir space whereby the intermediate chamber is so connected with the working space that the viscosity liquid flows from the intermediate chamber into the working space no further inwardly than the inner circumference of the liquid ring present in the working space.
Inventors
- 👤 Gunter Perrin
- 👤 Gerhard Pabinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:19
CPC Classifications
F; F01; F01P; F01P7/00; F01P7/02; F01P7/04; F01P7/042; F16; F16D; F16D35/00; F16D35/02
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
154 words
A viscosity coupling comprising: a driving member having entrainment surface means, a driven member having entrainment surface means, said driving and driven members being arranged for relative rotative motion with respect to a longitudinal axis of the coupling, a working space, the respective entrainment surface means of the driving and driven members being disposed in the working space mutually opposite one another with slight gaps therebetween, a reservoir space containing a supply of viscous working liquid, and communicating means for communicating the liquid in the reservoir space with the working space, said communicating means including adjusting means responsive to an adjusting magnitude for controlling the amount of liquid communicated to the working space and liquid introducing means for introducing the liquid into the working space substantially no further radially inwardly than the inner radial extent of a liquid annular ring alreadY formed in the working space by liquid previously introduced to said working space.
Claim 2
Dependent Claim
154 words
A viscosity coupling comprising: a driving member having entrainment surface means, a driven member having entrainment surface means, said driving and driven members being arranged for relative rotative motion with respect to a longitudinal axis of the coupling, a working space, the respective entrainment surface means of the driving and driven members being disposed in the working space mutually opposite one another with slight gaps therebetween, a reservoir space containing a supply of viscous working liquid, and communicating means for communicating the liquid in the reservoir space with the working space, said communicating means including adjusting means responsive to an adjusting magnitude for controlling the amount of liquid communicated to the working space and liquid introducing means for introducing the liquid into the working space substantially no further radially inwardly than the inner radial extent of a liquid annular ring alreadY formed in the working space by liquid previously introduced to said working space.
Claim 3
Dependent Claim
93 words
A viscosity coupling according to claim 1, wherein said introducing means includes an intermediate chamber means arranged between the working space and the reservoir space and a feed line means from the reservoir space terminating in the intermediate chamber means, and wherein said intermediate chamber means is operatively connected with the working space in such a manner that the liquid flows from the intermediate chamber means into the working space at a radial distance that is located at most substantially along the inner circumference of the liquid ring present in the working space.
Claim 4
Dependent Claim
34 words
A viscosity coupling according to claim 2, characterized in that the driving member is connected with an internal combustion engine and the driven member is connected with a fan of the internal combustion engine.
Claim 5
Dependent Claim
66 words
A viscosity coupling according to claim 2, wherein said adjusting means includes stationary scoop tube means movable for changing the intensity of the liquid feed from the reservoir space to the working space, characterized in that a short feed pipe extending from the inner end of the scoop tube means into the intermediate chamber means terminates essentially within the inner area of the intermediate chamber means.
Claim 6
Dependent Claim
19 words
A viscosity coupling according to claim 2, characterized in that the intermediate chamber means has a disk-shaped cross section.
Claim 7
Dependent Claim
20 words
A viscosity coupling according to claim 2, characterized in that the intermediate chamber means has a cross section that widens.
Claim 8
Dependent Claim
24 words
A viscosity coupling according to claim 2, characterized in that the cross section of the intermediate chamber means becomes wider in the outward direction.
Claim 9
Dependent Claim
24 words
A viscosity coupling according to claim 2, characterized in that the cross section of the intermediate chamber means becomes wider in the inward direction.
Claim 10
Dependent Claim
102 words
A viscosity coupling according to claim 2, wherein said reservoir space is formed in a housing operatively connected with the output of the coupling, wherein said driving member comprises a driving disk means arranged in said housing, and wherein said intermediate chamber means is formed in a further disk means positioned between said driving disk means and said reservoir space, said further disk means including a first wall means facing the driving disk means, said first wall means being provided with feed aperture means distributed substantially uniformly over the surface thereof for introducing liquid from said intermediate chamber to said working space.
Claim 11
Dependent Claim
17 words
A viscosity coupling according to claim 9, characterized in that the output is constituted by said housing.
Claim 12
Dependent Claim
23 words
A viscosity coupling according to claim 9, characterized in that the feed aperture means in the first wall means are arranged spirally shaped.
Claim 13
Dependent Claim
68 words
A viscosity coupling according to claim 11, characterized in that return aperture means are arranged in the first wall means along a place corresponding to the outer diameter area of the working space, and in that a second wall means of the disk means facing the reservoir space is sealingly connected radially with the first wall means intermediate the return aperture means and the outer feed aperture means.
Claim 14
Dependent Claim
66 words
A viscosity coupling according to claim 12, wherein said adjusting means includes stationary scoop tube means movable for changing the intensity of the liquid feed from the reservoir space to the working space, characterized in that a short feed pipe extending from the inner end of the scoop tube means into the intermediate chamber means terminates essentially within the inner area of the intermediate chamber means.
Claim 15
Dependent Claim
34 words
A viscosity coupling according to claim 13, characterized in that the first wall means extends conically at the inner edge thereof for a safe interception of the working liquid discharged from the feed pipe.
Claim 16
Dependent Claim
20 words
A viscosity coupling according to claim 14, characterized in that several radially extending slots are arranged in the drIving disk.
Claim 17
Dependent Claim
23 words
A viscosity coupling according to claim 14, characterized in that bores distributed uniformly over the entire surface are arranged in the driving disk.
Claim 18
Dependent Claim
19 words
A viscosity coupling according to claim 14, characterized in that the intermediate chamber means has a disk-shaped cross section.
Claim 19
Dependent Claim
20 words
A viscosity coupling according to claim 14, characterized in that the intermediate chamber means has a cross section that widens.
Claim 20
Dependent Claim
24 words
A viscosity coupling according to claim 14, characterized in that the cross section of the intermediate chamber means becomes wider in the outward direction.
Claim 21
Dependent Claim
24 words
A viscosity coupling according to claim 14, characterized in that the cross section of the intermediate chamber means becomes wider in the inward direction.
Claim 22
Dependent Claim
32 words
A viscosity coupling according to claim 14, characterized in that the cross section of the intermediate chamber means changes in the radial direction by a corresponding configuration of the second wall means.
Claim 23
Dependent Claim
23 words
A viscosity coupling according to claim 18, characterized in that the reservoir space has a cross section that changes in the radial direction.
Claim 24
Dependent Claim
23 words
A viscosity coupling according to claim 22, characterized in that the cross section of the reservoir space becomes wider in the outward direction.
Claim 25
Dependent Claim
23 words
A viscosity coupling according to claim 22, characterized in that the cross section of the reservoir space becomes wider in the inward direction.
Claim 26
Dependent Claim
68 words
A viscosity coupling according to claim 9, characterized in that return aperture means are arranged in the first wall means along a place corresponding to the outer diameter area of the working space, and in that a second wall means of the disk means facing the reservoir space is sealingly connected radially with the first wall means intermediate the return aperture means and the outer feed aperture means.
Claim 27
Dependent Claim
34 words
A viscosity coupling according to claim 9, characterized in that the first wall means extends conically at the inner edge thereof for a safe interception of the working liquid discharged from the feed pipe.
Claim 28
Dependent Claim
20 words
A viscosity coupling according to claim 9, characterized in that several radially extending slots are arranged in the driving disk.
Claim 29
Dependent Claim
23 words
A viscosity coupling according to claim 9, characterized in that bores distributed uniformly over the entire surface are arranged in the driving disk.
Claim 30
Dependent Claim
25 words
A viscosity coupling according to claim 1, wherein said reservoir space is located radially outwardly of said working space with respect to said longitudinal axis.
Claim 31
Dependent Claim
76 words
A viscosity coupling according to claim 1, wherein said reservoir space is formed in a housing operatively connected with the output of the coupling, wherein said driving member comprises a driving disk means arranged in said housing, and wherein said introducing means includes a further disk means positioned between said driving disk means and said reservoir space, said further disk means including a plurality of continuously open feed apertures for introducing liquid to said working space.
Claim 32
Dependent Claim
23 words
A viscosity coupling according to claim 30, wherein said feed apertures are distributed substantially uniformly over the surface of said further disk means.
Claim 33
Dependent Claim
42 words
A viscosity coupling according to claim 30, wherein said further disk means includes two disk shaped walls defining an intermediate chamber therebetween, and wherein said liquid is communicated from said reservoir space to said working space by way of said intermediate chamber.
Claim 34
Dependent Claim
37 words
A viscosity coupling according to claim 32, wherein said feed apertures are disposed in one of said walls, and wherein the other of said walls is substantially solid in the region thereof disposed opposite said feed apertures.
Claim 35
Dependent Claim
71 words
A viscosity coupling according to claim 33, wherein said liquid in said reservoir space is arranged in a reservoir space annular ring at the radial outward extent of said reservoir space during rotation of said housing, and wherein radially inwardly extending pipe means are provided for transferring said lIquid from said reservoir space annular ring to said intermediate space by way of a central opening in the other of said walls.
Claim 36
Dependent Claim
90 words
A viscosity coupling according to claim 1, wherein said reservoir space is formed in a housing operatively connected with the output of the coupling, and wherein said liquid in said reservoir space is arranged in a reservoir space annular ring at the radial outward extent of said reservoir space during rotation of said housing, and wherein said fluid is communicated from said reservoir space annular ring to said working space by way of a first radially inwardly extending path and then by way of a second radially outwardly extending path.
Claim 37
Dependent Claim
33 words
A viscosity coupling according to claim 35, wherein said first and second radially extending paths are in contact with surfaces of a disk means arranged between said reservoir space and said working space.
Claim 38
Dependent Claim
32 words
A viscosity coupling according to claim 25, characterized in that the cross section of the intermediate chamber means changes in the radial direction by a corresponding configuration of the second wall means.
References Cited (Backward Citations)
US3458020A
Cited
US3559786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |