Patent US1255368A successfully refreshed from Google Patents.
Patent US3593596A successfully refreshed from Google Patents.
US3593596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power transmission mechanism
Assignee: Mack Trucks Inc
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Filing: 1969-12-15
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Granted: 1971-07-20
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Expires: 1989-12-15
Abstract
Abstract A power transmission mechanism having mechanical and hydraulic drive paths comprising a pinion shaft drivingly connected to a plurality of countershafts and a hydraulic torque converter drivingly connected to each countershaft by a one-way clutch. The torque converters and the pinion shaft are disposed for selective engagement with an input shaft by means of clutches. In an alternative arrangement, a clutch selectively connects each converter rotor to its impeller and another clutch selectively grounds each converter stator to the transmission housing.
Inventors
- 👤 Keith W Race
- 👤 Delbert E Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:45
CPC Classifications
F; F16; F16H; F16H3/00; F16H3/02; F16H3/08; F16H3/087; F16H3/093; F16H3/095; F16H47/00; F16H47/06; F16H47/07; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19037; Y10T74/19219; Y10T74/19233
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
84 words
A power transmission mechanism comprising an input shaft, an output shaft, a direct drive means connecting the input shaft to the output shaft to provide a mechanical power path, a plurality of countershafts in generally parallel alignment with the direct drive means, a plurality of hydraulic torque converters, each mounted coaxially with and drivingly engaging a countershaft, means for drivingly engaging the input shaft with each torque converter, and means for drivingly engaging each countershaft with the output shaft in a hydraulic power path.
Claim 2
Dependent Claim
84 words
A power transmission mechanism comprising an input shaft, an output shaft, a direct drive means connecting the input shaft to the output shaft to provide a mechanical power path, a plurality of countershafts in generally parallel alignment with the direct drive means, a plurality of hydraulic torque converters, each mounted coaxially with and drivingly engaging a countershaft, means for drivingly engaging the input shaft with each torque converter, and means for drivingly engaging each countershaft with the output shaft in a hydraulic power path.
Claim 3
Dependent Claim
48 words
A power transmission mechanism according to claim 1 in which the direct drive means include a pinion shaft, a gear train to which drive is transmitted from the pinion shaft, and a clutch for selectively engaging gearwheels of the gear train to transmit drive to the output shaft.
Claim 4
Dependent Claim
60 words
A power transmission mechanism according to claim 1 in which the direct drive means include a pinion shaft, a clutch for selectively engaging the input shaft with the pinion shaft, a gear train to which drive is transmitted from the pinion shaft, and a clutch for selectively engaging gearwheels of the gear train to transmit drive to the output shaft.
Claim 5
Dependent Claim
48 words
A power transmission mechanism according to claim 3 in which the means for drivingly engaging each countershaft with the output shaft in a hydraulic power path include said gear train and said clutch for selectively engaging gearwheels of the gear train to transmit drive to the output shaft.
Claim 6
Dependent Claim
103 words
A power transmission mechanism according to claim 1 in which the direct drive means include a pinion shaft, a gear train having a driving gearwheel carried coaxially on the pinion shaft, a plurality of gearwheels carried on and coaxial with each countershaft, one such gearwheel on each countershaft in constant mesh with the pinion shaft driving gearwheel, and each remaining such gearwheel on each countershaft in constant mesh with a gearwheel on each countershaft in constant mesh with a gearwheel positioned coaxially with the pinion shaft, and a clutch for coupling the output shaft selectively to the gearwheels coaxial with the pinion shaft.
Claim 7
Dependent Claim
106 words
A power transmission mechanism according to claim 1 in which the direct drive means include a pinion shaft, a clutch for selectively engaging the input shaft with the pinion shaft, a gear train having a driving gearwheel carried coaxially on the pinion shaft, a plurality of gearwheels carried on and coaxial with each countershaft, one such gearwheel on each countershaft in constant mesh with the pinion shaft driving gearwheel, and each rEmaining such gearwheel on each countershaft in constant mesh with a gearwheel positioned coaxially with the pinion shaft, and a clutch for coupling the output shaft selectively with the gearwheels coaxial with the pinion shaft.
Claim 8
Dependent Claim
56 words
A power transmission mechanism according to claim 1 in which the means for drivingly engaging each countershaft with the output shaft in a hydraulic power path include a gear train to which drive is transmitted from the countershaft and a clutch for selectively engaging gearwheels of the gear train to transmit drive to the output shaft.
Claim 9
Dependent Claim
90 words
A power transmission mechanism according to claim 1 in which the means for drivingly engaging each countershaft with the output shaft in a hydraulic power path include a gear train having a plurality of driving gearwheels mounted on and coaxial with each countershaft and a plurality of driven gearwheels positioned along an axis parallel to the countershafts, each such driven gearwheel in constant mesh with a driving gearwheel of each countershaft, and a clutch positioned coaxially with the driven gearwheels for coupling the output shaft selectively to said driven gearwheels.
Claim 10
Dependent Claim
25 words
A power transmission mechanism according to claim 1 in which the means for drivingly engaging the input shaft with each torque converter include a clutch.
Claim 11
Dependent Claim
66 words
A power transmission mechanism according to claim 1 in which the means for drivingly engaging the input shaft with each torque converter include a gear train having a driving gear mounted coaxially with the input shaft and in constant mesh with a driven gear mounted on the impeller hub of each torque converter, and a clutch for selectively engaging the input shaft with the driving gear.
Claim 12
Dependent Claim
28 words
A power transmission mechanism according to claim 1, further comprising a plurality of one-way clutches, each for drivingly engaging the rotor of a torque converter with a countershaft.
Claim 13
Dependent Claim
47 words
A power transmission mechanism according to claim 1, in which the direct drive means include a plurality of clutches, each to selectively engage a torque converter rotor with its impeller, and a plurality of clutches, each to selectively ground a torque converter stator to the transmission housing.
Claim 14
Dependent Claim
75 words
A power transmission mechanism according to claim 1, in which the direct drive means include a plurality of clutches, each to selectively engage a torque converter rotor with its impeller, a plurality of clutches, each to selectively ground a torque converter stator to the transmission housing, a gear train to which drive is transmitted from the rotors and a clutch for selectively engaging gearwheels of the gear train to transmit drive to the output shaft.
Claim 15
Dependent Claim
48 words
A power transmission mechanism according to claim 13, in which the means for drivingly engaging each countershaft with the output shaft in a hydraulic power path include said gear train and said clutch for selectively engaging gearwheels of the gear train to transmit drive to the output shaft.
Claim 16
Dependent Claim
153 words
A power transmission mechanism comprising an input shaft, an output shaft, a pinion shaft, a clutch for selectively engaging the pinion shaft with the input shaft in a mechanical power path, a plurality of countershafts in generally parallel alignment with the pinion shaft, a plurality of hydraulic torque converters, each mounted coaxially with a countershaft and each to operate simultaneously with the other torque converters, a clutch for selectively engaging the input shaft with each torque converter in a hydraulic power path, a plurality of one-way clutches, each for drivingly engaging in the hydraulic power path the rotor of a torque converter with a countershaft and for allowing the countershaft to overrun the torque converter, a gear train engaging the pinion shaft in the mechanical power path and the countershaft in the hydraulic power path, and a clutch for selectively engaging gearwheels of the gear train to transmit drive to the output shaft.
Claim 17
Dependent Claim
153 words
A power transmission mechanism comprising an input shaft, an output shaft, a pinion shaft, a clutch for selectively engaging the pinion shaft with the input shaft in a mechanical power path, a plurality of countershafts in generally parallel alignment with the pinion shaft, a plurality of hydraulic torque converters, each mounted coaxially with a countershaft and each to operate simultaneously with the other torque converters, a clutch for selectively engaging the input shaft with each torque converter in a hydraulic power path, a plurality of one-way clutches, each for drivingly engaging in the hydraulic power path the rotor of a torque converter with a countershaft and for allowing the countershaft to overrun the torque converter, a gear train engaging the pinion shaft in the mechanical power path and the countershaft in the hydraulic power path, and a clutch for selectively engaging gearwheels of the gear train to transmit drive to the output shaft.
Claim 18
Dependent Claim
119 words
A power transmission mechanism having mechanical and hydraulic drive paThs comprising an input shaft, an output shaft, a plurality of countershafts in generally parallel alignment, a plurality of hydraulic torque converters, each mounted coaxially with a countershaft and having an impeller drivingly engaged by the input shaft and a rotor drivingly engaging a countershaft, a plurality of clutches, each to selectively engage a torque converter rotor with its impeller in the mechanical drive path, a plurality of clutches, each to selectively ground a torque converter stator to the transmission housing, a gear train to which drive is transmitted from the countershafts, and a clutch for selectively engaging gearwheels of the gear train to transmit drive to the output shaft.
Claim 19
Dependent Claim
119 words
A power transmission mechanism having mechanical and hydraulic drive paThs comprising an input shaft, an output shaft, a plurality of countershafts in generally parallel alignment, a plurality of hydraulic torque converters, each mounted coaxially with a countershaft and having an impeller drivingly engaged by the input shaft and a rotor drivingly engaging a countershaft, a plurality of clutches, each to selectively engage a torque converter rotor with its impeller in the mechanical drive path, a plurality of clutches, each to selectively ground a torque converter stator to the transmission housing, a gear train to which drive is transmitted from the countershafts, and a clutch for selectively engaging gearwheels of the gear train to transmit drive to the output shaft.
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |