US3675508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powershift transmission
Assignee: Oshkosh Truck Corp
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Filing: 1970-09-04
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Granted: 1972-07-11
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Expires: 1990-09-04
Abstract
Abstract An eight speed vehicle transmission including a four speed main gear box and a two speed splitter gear box located on the input side of the four speed gear box. The four speed main gear box is detachable from the two speed splitter gear box for use with lighter weight vehicles. The transmission includes oil actuated multiple disk, power shift clutches for actuating constant mesh spur gears. The clutches are operated in sequentially selected combinations by means of hydraulic fluid under pressure regulated by solenoid operated pilot valves. The solenoids are operated by relays through means of a selector switch. The range shift in the four speed main transmission is obtained by the use of two single clutch packs on the third shaft is used for the low range torque with the torque with the torque multiplication taken on the output side of this clutch. The high range torque is handled by the single clutch pack on the fourth shaft. The output shaft of the main gear box has connections for rear and front axles. The output torque to the front axle is controlled by a torque limiter. Front axle drive disconnect means are also provided.
Inventors
- 👤 Wallace J Blank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:35
CPC Classifications
B; B60; B60K; B60K17/00; B60K17/34; B60K17/348; B60K17/35; B60K17/3505; F; F16; F16H; F16H3/00; F16H3/02; F16H3/08; F16H3/087; F16H3/093; F16H37/00; F16H37/02; F16H37/04; F16H37/042; F16H37/043; F16H2003/0935; F16H2200/00; F16H2200/003; F16H2200/006; F16H2200/0082; F16H2200/0086; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19167; Y10T74/19219; Y10T74/19377; Y10T74/19386; Y10T74/19391; Y10T74/194; Y10T74/19405
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
384 words
A power transmission including: a four speed main gear box and a two speed splitter gear box with said two speed splitter gear box located at the input side of said main gear box, an input shaft and an output shaft mounted in said splitter gear box, a pair of clutch actuated spur gears in said splitter gear box journalled on said input shaft, spur gears affixed to said output shaft of said splitter gear box and meshing with said input shaft clutch actuated spur gears, said pairs of input and output shaft spur gears having different transmission ratios, an input shaft mounted in said four speed main gear box and connected to said output shaft of said two speed splitter gear box, a pair of clutch actuated spur gears in said main gear box journalled on said input shaft, a spur gear affixed to said input shaft, a reverse shaft mounted in said main gear box, a spur gear affixed to said reverse shaft and meshing with said fixed spur gear of said input shaft, a clutch actuated spur gear journalled on said reverse shaft, a third shaft mounted in said main gear box and having fixed spur gears meshing with said clutch actuated spur gears of said input shaft, a clutch actuated spur gear journalled on said third shaft, said clutch actuated spur gear of said reverse shaft meshing with one of said fixed spur gears of said third shaft, a fourth shaft mounted in said main gear box, a pair of spur gears affixed to said fourth shaft with one of said fixed spur gears meshing with said clutch actuated spur gear of said third shaft, a clutch actuated spur gear journalled on said fourth shaft and meshing with one of said fixed spur gears of said third shaft, an output shaft mounted in said main gear box, a spur gear affixed to said output shaft and meshing with the other of said fixed spur gears of said fourth shaft, and each of said clutch actuated spur gears being journalled on its respective shaft and locked to its shaft for rotation therewith upon actuation of its clutch, means to selectively actuate said clutches to lock said spur gears with their respective shafts to vary the input-output speed ratio of the transmission.
Claim 2
Dependent Claim
384 words
A power transmission including: a four speed main gear box and a two speed splitter gear box with said two speed splitter gear box located at the input side of said main gear box, an input shaft and an output shaft mounted in said splitter gear box, a pair of clutch actuated spur gears in said splitter gear box journalled on said input shaft, spur gears affixed to said output shaft of said splitter gear box and meshing with said input shaft clutch actuated spur gears, said pairs of input and output shaft spur gears having different transmission ratios, an input shaft mounted in said four speed main gear box and connected to said output shaft of said two speed splitter gear box, a pair of clutch actuated spur gears in said main gear box journalled on said input shaft, a spur gear affixed to said input shaft, a reverse shaft mounted in said main gear box, a spur gear affixed to said reverse shaft and meshing with said fixed spur gear of said input shaft, a clutch actuated spur gear journalled on said reverse shaft, a third shaft mounted in said main gear box and having fixed spur gears meshing with said clutch actuated spur gears of said input shaft, a clutch actuated spur gear journalled on said third shaft, said clutch actuated spur gear of said reverse shaft meshing with one of said fixed spur gears of said third shaft, a fourth shaft mounted in said main gear box, a pair of spur gears affixed to said fourth shaft with one of said fixed spur gears meshing with said clutch actuated spur gear of said third shaft, a clutch actuated spur gear journalled on said fourth shaft and meshing with one of said fixed spur gears of said third shaft, an output shaft mounted in said main gear box, a spur gear affixed to said output shaft and meshing with the other of said fixed spur gears of said fourth shaft, and each of said clutch actuated spur gears being journalled on its respective shaft and locked to its shaft for rotation therewith upon actuation of its clutch, means to selectively actuate said clutches to lock said spur gears with their respective shafts to vary the input-output speed ratio of the transmission.
Claim 3
Dependent Claim
34 words
The transmission of claim 1 further characterized in that the output shaft has output connections at its opposite ends and one of said output connections is selectively disconnectable from the remainder of the shaft.
Claim 4
Dependent Claim
33 words
The transmission of claim 1 further characterized in that the output shaft has output connections at its opposite ends and means are provided to limit the torque to one of said output connections.
Claim 5
Dependent Claim
51 words
The transmission of claim 1 further characterized in that said clutch actuated spur gear of said third shaft and said meshing spur gear of said fourth shaft are sized relative to each other to reduce the speed of and increase the torque of the fourth shaft relative to the third shaft.
Claim 6
Dependent Claim
51 words
The transmission of claim 1 furTher characterized in that said clutch actuated spur gear of said fourth shaft and said meshing spur gear of said third shaft are sized relative to each other to increase the speed of and reduce the torque of the fourth shaft relative to the third shaft.
Claim 7
Dependent Claim
283 words
A power transmission including: a four speed gear box of the counter-shaft type having constant meshed gears mounted on parallel shafts, an input shaft mounted in said four speed gear box, a pair of clutch actuated spur gears journalled on said input shaft, a spur gear affixed to said input shaft, a reverse shaft mounted in said gear box, a spur gear affixed to said reverse shaft and meshing with said fixed spur gear of said input shaft, a clutch actuated spur gear journalled on said reverse shaft, a third shaft mounted in said gear box and having fixed spur gears meshing with said clutch actuated spur gears of said input shaft, a clutch actuated spur gear journalled on said third shaft, said clutch actuated spur gear of said reverse shaft meshing with one of said fixed spur gears of said third shaft, a fourth shaft mounted in said gear box, a pair of spur gears affixed to said fourth shaft with one of said fixed spur gears meshing with said clutch actuated spur gear of said third shaft, a clutch actuated spur gear journalled on said fourth shaft and meshing with one of said fixed spur gears of said third shaft, an output shaft mounted in said gear box, a spur gear affixed to said output shaft and meshing with the other of said fixed spur gears of said fourth shaft, each of said clutch actuated spur gears being journalled on its respective shaft and locked to its shaft for rotation therewith upon actuation of its clutch, and means to selectively actuate said clutches to lock said spur gears with their respective shafts to vary the input-output speed ratio of the transmission.
Claim 8
Dependent Claim
283 words
A power transmission including: a four speed gear box of the counter-shaft type having constant meshed gears mounted on parallel shafts, an input shaft mounted in said four speed gear box, a pair of clutch actuated spur gears journalled on said input shaft, a spur gear affixed to said input shaft, a reverse shaft mounted in said gear box, a spur gear affixed to said reverse shaft and meshing with said fixed spur gear of said input shaft, a clutch actuated spur gear journalled on said reverse shaft, a third shaft mounted in said gear box and having fixed spur gears meshing with said clutch actuated spur gears of said input shaft, a clutch actuated spur gear journalled on said third shaft, said clutch actuated spur gear of said reverse shaft meshing with one of said fixed spur gears of said third shaft, a fourth shaft mounted in said gear box, a pair of spur gears affixed to said fourth shaft with one of said fixed spur gears meshing with said clutch actuated spur gear of said third shaft, a clutch actuated spur gear journalled on said fourth shaft and meshing with one of said fixed spur gears of said third shaft, an output shaft mounted in said gear box, a spur gear affixed to said output shaft and meshing with the other of said fixed spur gears of said fourth shaft, each of said clutch actuated spur gears being journalled on its respective shaft and locked to its shaft for rotation therewith upon actuation of its clutch, and means to selectively actuate said clutches to lock said spur gears with their respective shafts to vary the input-output speed ratio of the transmission.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |