Patent US4493227A successfully refreshed from Google Patents.
US4493227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-locking differential gear unit; more specially for motor vehicles
Assignee: Individual
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Filing: 1982-02-04
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Granted: 1985-01-15
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Expires: 2002-02-04
Abstract
Abstract The spider of a differential gear unit is joined up with one half of a hydrodynamic coupling whose other, outer half is joined up by way of step-up gearing with one half axle so that on slipping of one wheel or on rounding a corner the outer coupling half is turned at a higher speed than the half axle driving it.
Inventors
- 👤 Leopold F. Schmid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:52
CPC Classifications
F; F16; F16H; F16H48/00; F16H48/20; F16H48/27; F16H48/06; F16H48/08; F16H48/10; F16H48/38; F16H48/40
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
150 words
In a self-locking differential gear unit having a powered differential gear housing bearinged in an axle drive housing and within which two axle bevel wheels for driving two axle shafts are positioned, such bevel gear wheels meshing with differential gear wheels, and a non-positive coupling placed outside the differential gear housing for locking the differential gear unit, one half of said coupling being joined with the differential gear housing and the other coupling half being joined with one of the two axle shafts, the invention residing in that the two coupling halves take the form of blade rings of a hydrodynamic coupling and in that the gear unit has change speed gearing, such change speed gearing being designed for producing an increase in speed, on one of said axle shafts turning faster than the other, responsible for said one blade ring turning faster than the axle shaft driving the same.
Claim 2
Dependent Claim
150 words
In a self-locking differential gear unit having a powered differential gear housing bearinged in an axle drive housing and within which two axle bevel wheels for driving two axle shafts are positioned, such bevel gear wheels meshing with differential gear wheels, and a non-positive coupling placed outside the differential gear housing for locking the differential gear unit, one half of said coupling being joined with the differential gear housing and the other coupling half being joined with one of the two axle shafts, the invention residing in that the two coupling halves take the form of blade rings of a hydrodynamic coupling and in that the gear unit has change speed gearing, such change speed gearing being designed for producing an increase in speed, on one of said axle shafts turning faster than the other, responsible for said one blade ring turning faster than the axle shaft driving the same.
Claim 3
Dependent Claim
49 words
The self-locking differential gear unit as claimed in claim 1 wherein a working space shut in between the two coupling halves and filled with a hydrodynamic fluid is joined up by way of an aspiration valve with a store space for the hydrodynamic fluid, formed in said gear unit.
Claim 4
Dependent Claim
73 words
A differential gear unit having: two half axles, a differential spider, four meshing bevel wheels nested within said spider and forming a driving differential connection between said spider and said half axles, a hydrodynamic coupling centered on one of said half axles and step-up gearing joining one of said half axles with said coupling for producing a torqued driving connection for turning a coupling half faster than said half axle and said spider.
Claim 5
Dependent Claim
73 words
A differential gear unit having: two half axles, a differential spider, four meshing bevel wheels nested within said spider and forming a driving differential connection between said spider and said half axles, a hydrodynamic coupling centered on one of said half axles and step-up gearing joining one of said half axles with said coupling for producing a torqued driving connection for turning a coupling half faster than said half axle and said spider.
Claim 6
Dependent Claim
75 words
A differential gear unit as claimed in claim 3 wherein said step-up gearing is made up of concentric gear teeth rings with different numbers of gear teeth on said spider and on said one half axle, two joined-together pinions designed for running on two of said gear rings, and a means supporting said pinions on said coupling for turning one half thereof when said one half axle and said spider are running at different speeds.
Claim 7
Dependent Claim
47 words
A differential gear unit as claimed in claim 3 wherein a working space shut in between two coupling halves and filled with a hydrodynamic fluid is joined up by way of an aspiration valve with a store space for the hydrodynamic fluid, formed in said gear unit.
References Cited (Backward Citations)
US1449562A
Cited
US2743792A
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US3534633A
Cited
US3686976A
Cited
GB1410061A
Cited
US4096712A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-15 | 1988-07-16 | 1989-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-15 | 1992-07-16 | 1993-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-15 | 1996-07-16 | 1997-01-15 | $7700.00 | Window Closed / Lapsed |