US4856368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
HST (hydrostatic transmission) containing axle drive apparatus
Assignee: Kanzaki Kokyukoki Manufacturing Co Ltd
•
Filing: 1988-06-27
•
Granted: 1989-08-15
•
Expires: 2008-06-27
Abstract
Abstract An axle driving apparatus for a small-sized vehicle, such as a tractor, which divides its axle casing into first and second axle casings. A hydraulic pump, provided with a vertical pump shaft, is disposed within one of the axle casings. A hydraulic motor, provided with a horizontal motor shaft; a speed reduction shaft; and a differential gear unit, are disposed within the other of said axle casings. This configuration allows a driving force to be transmitted from the vertical pump shaft to the horizontal motor shaft.
Inventors
- 👤 Koichiro Fujisaki
- 👤 Ryota Ohashi
- 👤 Shusuke Nemoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:44
CPC Classifications
B; B60; B60K; B60K17/00; B60K17/04; B60K17/10; B60K17/105; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2186
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
130 words
An axle driving apparatus housing a hydrostatic transmission, comprising: an axle housing; said axle housing having therein a first axle, a second axle and a differential gear unit; said axle housing being divided into a first axle casing and a second axle casing portion; a hydraulic pump, having a pump shaft disposed perpendicular to said first axle and said second axle, disposed within one of said first and second axle casings; a hydraulic motor, having a motor shaft disposed parallel to said first axle and said second axle; a speed reduction transmission for associating said motor shaft with a ring gear of said differential gear unit; and said hydraulic motor, said speed reduction transmission, and said differential gear unit disposed within the other of said first and second axle casings.
Claim 2
Dependent Claim
130 words
An axle driving apparatus housing a hydrostatic transmission, comprising: an axle housing; said axle housing having therein a first axle, a second axle and a differential gear unit; said axle housing being divided into a first axle casing and a second axle casing portion; a hydraulic pump, having a pump shaft disposed perpendicular to said first axle and said second axle, disposed within one of said first and second axle casings; a hydraulic motor, having a motor shaft disposed parallel to said first axle and said second axle; a speed reduction transmission for associating said motor shaft with a ring gear of said differential gear unit; and said hydraulic motor, said speed reduction transmission, and said differential gear unit disposed within the other of said first and second axle casings.
Claim 3
Dependent Claim
29 words
An axle driving apparatus as set forth in claim 1, wherein said hydraulic pump is provided at a bottom wall of one of said first and second axle casings.
Claim 4
Dependent Claim
20 words
An axle driving apparatus as set forth in claim 2, wherein said pump shaft projects perpendicularly from said axle casings.
Claim 5
Dependent Claim
128 words
An axle driving apparatus as set forth in claim 1, further comprising a vertical bearing wall; said bearing wall being formed in one of said first and second axle casings at the division of said first and second axle casings; said bearing wall being greater in thickness than the remained of said one of said first and second axle casings; said bearing wall supporting said first and second axles and said speed reduction transmission; said hydraulic motor being attached to a side wall of said other of said first and second axle casing portions at a surface of said other axle casing portion which is opposite to said hydraulic pump; and said bearing wall being provided with oil passages which connect said hydraulic pump and said hydraulic motor.
Claim 6
Dependent Claim
70 words
An axle driving apparatus as set forth in claim 1, further comprising a center plate fixedly sandwiched between said first and second axle casing portions; said hydraulic pump being attached to a lateral side surface of said center plate; said hydraulic motor being attached to another lateral side surfce of said center plate; and oil passages provided in said center plate for connecting said hydraulic pump and said hydraulic motor.
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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) | 1992-08-14 | 1993-02-13 | 1993-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-14 | 1997-02-13 | 1997-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-14 | 2001-02-13 | 2001-08-15 | $7700.00 | Window Closed / Lapsed |