US4602527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential gearing
Assignee: Individual
•
Filing: 1984-06-20
•
Granted: 1986-07-29
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Expires: 2004-06-20
Abstract
Abstract A differential for motor vehicles and the like effectively providing smooth power transmission from an input drive shaft driving two gears fixed axially spaced thereon driving with pin-like teeth, on side faces thereof, a driven gear having peripheral teeth oval in cross section and coaxial with two output bevel sun gears disposed opposed and having respective power output shafts for differential driving of the motor vehicle left and right wheels during turns. The output sun gears are disposed concentric with the driven gear with a common axis of rotation normal to the axis of rotation of the drive gears. The sun gears are driven differentially during vehicle turns by two bevel planetary gears each having as axis of rotation fixed in the driven gear and extending radially toward the axis of rotation common with the sun gears and symmetrical to the axis of rotation thereof.
Inventors
- 👤 Shigeru Tamiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:10
CPC Classifications
F; F16; F16H; F16H1/00; F16H1/02; F16H1/24; B; B60; B60K; B60K17/00; B60K17/04; B60K17/16; F16H48/00; F16H48/06; F16H48/08; F16H48/38; F16H2048/385; F16H48/42; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19642; Y10T74/19647; Y10T74/19651; Y10T74/19656; Y10T74/1987; Y10T74/19879; Y10T74/19884; Y10T74/19949
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
A differential for motor vehicles and the like comprising, an input drive shaft, a pair of coaxially spaced drive gears simultaneously driven by the input drive shaft in a same direction at a same speed of rotation about a common axis of rotation, a driven gear driven by the pair of drive gears for transmission of power from the input drive shaft, two coaxial opposed sun gears having an axis of rotation concentric with an axis of rotation of the driven gear, two planetary gears disposed between the sun gears for differential driving thereof during turns of the vehicle to the right and to the left with the sun gears for driving the sun gears, each planetary gear having a separate axis of rotation carried by the driven gear and each disposed therein and radially symetrically relative to the axis of rotation of the sun gears, and each sun gear having a respective power output shaft connected thereto for rotation therewith.
Claim 2
Dependent Claim
161 words
A differential for motor vehicles and the like comprising, an input drive shaft, a pair of coaxially spaced drive gears simultaneously driven by the input drive shaft in a same direction at a same speed of rotation about a common axis of rotation, a driven gear driven by the pair of drive gears for transmission of power from the input drive shaft, two coaxial opposed sun gears having an axis of rotation concentric with an axis of rotation of the driven gear, two planetary gears disposed between the sun gears for differential driving thereof during turns of the vehicle to the right and to the left with the sun gears for driving the sun gears, each planetary gear having a separate axis of rotation carried by the driven gear and each disposed therein and radially symetrically relative to the axis of rotation of the sun gears, and each sun gear having a respective power output shaft connected thereto for rotation therewith.
Claim 3
Dependent Claim
162 words
A differential for motor vehicles and the like comprising, an input drive shaft, a pair of coaxially spaced drive gears simultaneously driven by the input shaft in a same direction at a same speed of rotation about a common axis of rotation, a driven gear driven peripherally by the pair of drive gears for transmission of power from the input drive shaft, two coaxial opposed bevel sun gears having an axis of rotation concentric with an axis of rotation of the driven gear, two planetary gears disposed between the sun gears for differential driving thereof during turns of the vehicle to the right and to the left each meshing with the sun gears for driving the sun gears, each planetary gear having a separate axis of rotation carried by the driven gear disposed therein radially and symmetrically relative to the axis of rotation of the sun gears, and each sun gear having a respective power output shaft connected thereto for rotation therewith.
Claim 4
Dependent Claim
162 words
A differential for motor vehicles and the like comprising, an input drive shaft, a pair of coaxially spaced drive gears simultaneously driven by the input shaft in a same direction at a same speed of rotation about a common axis of rotation, a driven gear driven peripherally by the pair of drive gears for transmission of power from the input drive shaft, two coaxial opposed bevel sun gears having an axis of rotation concentric with an axis of rotation of the driven gear, two planetary gears disposed between the sun gears for differential driving thereof during turns of the vehicle to the right and to the left each meshing with the sun gears for driving the sun gears, each planetary gear having a separate axis of rotation carried by the driven gear disposed therein radially and symmetrically relative to the axis of rotation of the sun gears, and each sun gear having a respective power output shaft connected thereto for rotation therewith.
Claim 5
Dependent Claim
97 words
A differential for motor vehicles and the like according to claim 2, in which said driven gear has peripheral teeth, and in which said drive gears each have a respective face on which are disposed angularly spaced pin-like teeth circular in cross section disposed equally spaced in a circle and parallel to the axis of rotation of the drive gears for engaging the peripheral teeth of the driven gear, said driven gear being disposed with its axis of rotation in a plane normal to a plane passing through the common axis of rotation of the drive gears.
Claim 6
Dependent Claim
58 words
A differential for motor vehicles and the like according to claim 3, in which said driven gear is a ring gear, said peripheral teeth extending radially from the periphery of the ring gear equally spaced thereon, and each of the peripheral teeth having an oval cross section for tangential engagement by the pin-like teeth of the drive gears.
Claim 7
Dependent Claim
94 words
A differential according to claim 4, in which the drive gears and the individual pin-like teeth of the drive gears are disposed so that the individual pin-like teeth of one drive gear alternate with the individual pin-like teeth of the other drive gear in tangentially engaging the peripheral oval teeth of the driven gear, and engagement by the pin-like teeth is effected sequentially prior to disengagement of each pin-like tooth, whereby drive inputs to the driven gear are applied sequentially in a sequence in which the drive gears alternate in applying said drive inputs.
Claim 8
Dependent Claim
22 words
A differential according to claim 3, including for each pin a roller thereon for engaging the peripheral teeth of the drive gear.
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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) | 1989-07-28 | 1990-01-27 | 1990-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-28 | 1994-01-27 | 1994-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-28 | 1998-01-27 | 1998-07-29 | $7700.00 | Window Closed / Lapsed |