US4922787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
HST (hydrostatic transmission) housing axle driving apparatus
Assignee: Kanzaki Kokyukoki Manufacturing Co Ltd
•
Filing: 1988-06-27
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Granted: 1990-05-08
•
Expires: 2008-06-27
Abstract
Abstract An HST housing axle driving apparatus for a small-sized running vehicle, such as a tractor, in which an axle casing is divided into a left-side half axle casing and a right-side half axle casing. In one of the left- and right-side half axle casings are disposed a hydraulic pump provided with a vertical pump shaft and a hydraulic motor provided with a horizontal motor shaft. In the other of the left- and right-side half axle casings are disposed a speed reduction shaft and a differential gear unit, so that a driving force is adapted 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 04:54
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: 4
Claim 1
Independent Claim
176 words
An axle driving apparatus comprising: an axle housing, said axle housing being divided into a first axle casing and a second axle casing; a differential gear unit disposed within said axle housing; a first axle disposed within said first axle casing; a second axle disposed within said second axle casing; a hydraulic pump disposed within said axle housing, said hydraulic pump including a pump shaft which is disposed perpendicular to said first and second axles; a hydraulic motor disposed within said axle housing, said hydraulic motor including a hollow motor shaft which is freely fitted on an outer periphery of one of said first and second axles; a motor gear fixed to said hollow motor shaft adjacent said differential gear unit; a speed reduction transmission for drivingly connecting said motor gear and said differential gear unit; said speed reduction transmission and said differential gear unit being disposed within one of said first and second axle casings; and said hydraulic pump and said hydraulic motor being disposed within an other of said first and second axle casings.
Claim 2
Dependent Claim
176 words
An axle driving apparatus comprising: an axle housing, said axle housing being divided into a first axle casing and a second axle casing; a differential gear unit disposed within said axle housing; a first axle disposed within said first axle casing; a second axle disposed within said second axle casing; a hydraulic pump disposed within said axle housing, said hydraulic pump including a pump shaft which is disposed perpendicular to said first and second axles; a hydraulic motor disposed within said axle housing, said hydraulic motor including a hollow motor shaft which is freely fitted on an outer periphery of one of said first and second axles; a motor gear fixed to said hollow motor shaft adjacent said differential gear unit; a speed reduction transmission for drivingly connecting said motor gear and said differential gear unit; said speed reduction transmission and said differential gear unit being disposed within one of said first and second axle casings; and said hydraulic pump and said hydraulic motor being disposed within an other of said first and second axle casings.
Claim 3
Dependent Claim
249 words
An axle driving apparatus comprising: an axle housing, said axle housing being divided into a first axle casing and a second axle casing; a differential gear unit disposed within said axle housing; a first axle disposed within said first axle casing; a second axle disposed within said second axle casing; a hydraulic pump disposed within said axle housing, said hydraulic pump having a pump shaft which is disposed perpendicular to said first and second axles; a hydraulic motor disposed within said axle housing, said hydraulic motor including a hollow motor shaft which is freely fitted on an outer periphery of one of said first and second axles; a motor gear fixed to said hollow motor shaft adjacent said differential gear unit; a speed reduction transmission for drivingly connecting said motor gear and said differential gear unit; said speed reduction transmission and said differential gear unit being disposed within one of said first and second axle casings; said hydraulic pump and said hydraulic motor being disposed within an other of said first and second axle casings; a center plate, interposed between said first and second axle casings; a fixed swash plate supported on an inner side surface of one of said first and second axle casings; said motor shaft projecting from a side surface of said center plate; said hydraulic motor being mounted on another side surface of said center plate; and oil passages formed in said center plate for transfering oil between said hydraulic pump and said hydraulic motor.
Claim 4
Dependent Claim
249 words
An axle driving apparatus comprising: an axle housing, said axle housing being divided into a first axle casing and a second axle casing; a differential gear unit disposed within said axle housing; a first axle disposed within said first axle casing; a second axle disposed within said second axle casing; a hydraulic pump disposed within said axle housing, said hydraulic pump having a pump shaft which is disposed perpendicular to said first and second axles; a hydraulic motor disposed within said axle housing, said hydraulic motor including a hollow motor shaft which is freely fitted on an outer periphery of one of said first and second axles; a motor gear fixed to said hollow motor shaft adjacent said differential gear unit; a speed reduction transmission for drivingly connecting said motor gear and said differential gear unit; said speed reduction transmission and said differential gear unit being disposed within one of said first and second axle casings; said hydraulic pump and said hydraulic motor being disposed within an other of said first and second axle casings; a center plate, interposed between said first and second axle casings; a fixed swash plate supported on an inner side surface of one of said first and second axle casings; said motor shaft projecting from a side surface of said center plate; said hydraulic motor being mounted on another side surface of said center plate; and oil passages formed in said center plate for transfering oil between 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) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |