US3592078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple-pinion gear
Assignee: BBC Brown Boveri AG Germany
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Filing: 1969-06-10
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Granted: 1971-07-13
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Expires: 1989-06-10
Abstract
Abstract A multiple drive pinion gearing for transmitting power from the drive shaft of a driving machine to different working machines comprises a pair of axially spaced sets of gear teeth on the drive shaft which transmit power from the drive shaft via intermediate gear wheels to separate pinion gears respectively which are independently mounted parallel to the drive shaft and which function to drive the different working machines such as a turbocompressor. The pinion gears and their intermediate gear wheels are located on opposite sides of a divider plane extending between the two sets of gear teeth on the drive shaft and perpendicular to the axis of the drive shaft. All of the gears have helical toothing and the inclination of the teeth of those gears located on one side of the divider plane is opposite to that of the teeth on those gears located at the opposite side of the divider plane. Moreover, thrust bearings are provided for the shafts of the intermediate gear wheels to restrain them against any axial displacement, and the pinion gears are provided with abutment rings on each end thereof which overlap opposite ends of the intermediate gear wheels so as to transmit to the latter any axial thrust acting on the pinion gears.
Inventors
- 👤 Richard Stark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:53
CPC Classifications
F; F16; F16H; F16H57/00; F16H57/02; F16H57/02004; F04; F04D; F04D25/00; F04D25/16; F04D25/163; F16H1/00; F16H1/02; F16H1/20; F16H37/00; F16H2700/00; F16H2700/02; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19074; Y10T74/19079; Y10T74/19098; Y10T74/19112; Y10T74/19116; Y10T74/19628
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
256 words
In a multiple drive pinion gearing for transmitting power from the drive shaft of a driving machine, the combination comprising a pair of axially spaced sets of helical gear teeth on sad drive shaft, at least two independently mounted helically toothed drive pinion gears, a driven machine coupled to and driven by each said pinion gear, said pinion gears being parallel to each other and parallel to said drive shaft and located respectively on opposite sides of a divider plane extending between said sets of gear teeth on said drive shaft and perpendicular to the axis of said shaft, an independently mounted helically toothed intermediate gear wheel correlated to each said pinion gear and a correlated set of gear teeth on said drive shaft, said intermediate gear wheels being located intermediate said gear teeth on said drive shaft and said pinion gears and meshed therewith for transmitting power from said drive shaft to said pinion gears, a thrust bearing provided for each said intermediate gear wheel for restraining axial displacement thereof, and abutment rings fitted to the ends of said pinion gears and rotating therewith and which overlap the opposite ends of said intermediate gear wheels for transmitting to the latter any axial thrust acting on said pinion gears, the inclination of the helical teeth on said drive shaft and on said pinion gears and on said intermediate gear wheels located to one side of said divider plane being opposite to that of the corresponding gear teeth located to the other side of said divider plane.
Claim 2
Dependent Claim
256 words
In a multiple drive pinion gearing for transmitting power from the drive shaft of a driving machine, the combination comprising a pair of axially spaced sets of helical gear teeth on sad drive shaft, at least two independently mounted helically toothed drive pinion gears, a driven machine coupled to and driven by each said pinion gear, said pinion gears being parallel to each other and parallel to said drive shaft and located respectively on opposite sides of a divider plane extending between said sets of gear teeth on said drive shaft and perpendicular to the axis of said shaft, an independently mounted helically toothed intermediate gear wheel correlated to each said pinion gear and a correlated set of gear teeth on said drive shaft, said intermediate gear wheels being located intermediate said gear teeth on said drive shaft and said pinion gears and meshed therewith for transmitting power from said drive shaft to said pinion gears, a thrust bearing provided for each said intermediate gear wheel for restraining axial displacement thereof, and abutment rings fitted to the ends of said pinion gears and rotating therewith and which overlap the opposite ends of said intermediate gear wheels for transmitting to the latter any axial thrust acting on said pinion gears, the inclination of the helical teeth on said drive shaft and on said pinion gears and on said intermediate gear wheels located to one side of said divider plane being opposite to that of the corresponding gear teeth located to the other side of said divider plane.
Claim 3
Dependent Claim
26 words
A multiple drive pinion gearing as defined in claim 1 wherein two pinion gears arranged on both sides of said divider plane are disposed in alignment.
Claim 4
Dependent Claim
38 words
A multiple drive pinion gearing as defined in claim 2 wherein both the axes of said intermediate gear wheels and of said pinion gears are arranged in a horizontal plane passing through the axis of said drive shaft.
Claim 5
Dependent Claim
35 words
A multiple drive pinion gearing as defined in claim 3 where four pinion gears and four intermediate gear wheels are provided, and which are arranged symmetrically in relation to the axis of said drive shaft.
Claim 6
Dependent Claim
28 words
A multiple drive pinion gearing as defined in claim 1 wherein each of said pinion gears is coupled to and drives a machine via a flexible shaft element.
Claim 7
Dependent Claim
26 words
A multiple drive pinion gearing as defined in claim 1 wherein the transmission from said intermediate gear wheels to said pinion gears comprises a step-up ratio.
Claim 8
Dependent Claim
26 words
A multiple drive pinion gearing as defined in claim 1 wherein the transmission from said drive shaft to said pinion gears comprises an overall step-up ratio.
Claim 9
Dependent Claim
34 words
A multiple drive pinion gearing as defined in claim 1 wherein the transmission ratios from said drive shaft to said pinion gears are so selected that the individual pinion gears run at different speeds.
Claim 10
Dependent Claim
23 words
A multiple drive pinion gearing as defined in claim 1 wherein said pinion gears are coupled to and drive very high pressure turbocompressors.
Claim 11
Dependent Claim
91 words
A multiple drive pinion gearing as defined in claim 9 for driving a very high pressure turbocompressor consisting of a plurality of individual compressor units each of which is driven by one of said pinion gears, the individual drives for said compressor units together with the latter being so designed that the axial thrusts emanating from said compressor units and from the helical toothing between said intermediate gear wheels and pinion gears oppose one another in such manner as to provide the greatest possible amount of compensation for said axial thrusts.
Claim 12
Dependent Claim
134 words
A multiple drivE pinion gearing as defined in claim 1 wherein a working machine such as a compressor is coupled to and driven by each said pinion gear, and wherein the housing for such machine is mounted and guided on the drive side by means of claws on a support carried by a housing enclosing said gearing, and is mounted and guided on the nondrive side by means of claws on a steady block, and means enabling the thermal expansion behavior of said steady block to be affected in such a manner that when those points on the steady block which are provided for the purpose of supporting said working machines move under the influence of thermal expansion they follow the points provided on said gear housing for the support of said working machines.
Claim 13
Dependent Claim
29 words
A multiple drive pinion gearing as defined in claim 11 and which further includes means for keeping said steady blocks at substantially the same temperature as said gearing housing.
Claim 14
Dependent Claim
49 words
A multiple drive pinion gearing as defined in claim 12 wherein said means for keeping said steady blocks at substantially the same temperature as said gearing housing is constituted by a pipe connection via which hot lubricating oil draining from said gearing housing is fed to said steady blocks.
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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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |