US3871248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-power-path bevel gearing for high loads and high speeds
Assignee: Individual
•
Filing: 1974-08-13
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Granted: 1975-03-18
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Expires: 1994-08-13
Abstract
Abstract Two power paths through bevel gearing which is operating near its upper limit of speed and load permit reduction in gear size, weight and speed. In such gearing, load is equalized between two power paths by mounting opposed bevel pinions on the same shaft and permitting axial float for balancing of thrust loading. By this means, torque loading is equalized in the two paths, and the technologically difficult high speed ball thrust bearing is eliminated.
Inventors
- 👤 Thomas Barish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:16
CPC Classifications
F; F16; F16H; F16H1/00; F16H1/02; F16H1/20; F16H1/22; F16H1/222; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023; Y10T74/19144; Y10T74/19628; Y10T74/19642; Y10T74/1966; Y10T74/19665
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
161 words
A plural power path bevel gear train comprising: a radially supported and axially free bevel pinion shaft for rotation by a prime mover; first and second bevel pinions fixed to said bevel pinion shaft in opposed relationship for initiating first and second power paths in said gear train; and first and second bevel gears respectively in said first and second power paths, said first and second bevel gears being respectively in tooth engagement with said first and second bevel pinions, said tooth engagement being such that the division of torque through said first and second power paths is a function of axial position of said pinion shaft and said first and second pinions thereon with respect to said first and second bevel gears, and the axial position of said pinion shaft is automatically controlled by the balance of axial thrust forces on said bevel pinions by said bevel gears produced by torque transmitted from said bevel pinions to said bevel gears.
Claim 2
Dependent Claim
161 words
A plural power path bevel gear train comprising: a radially supported and axially free bevel pinion shaft for rotation by a prime mover; first and second bevel pinions fixed to said bevel pinion shaft in opposed relationship for initiating first and second power paths in said gear train; and first and second bevel gears respectively in said first and second power paths, said first and second bevel gears being respectively in tooth engagement with said first and second bevel pinions, said tooth engagement being such that the division of torque through said first and second power paths is a function of axial position of said pinion shaft and said first and second pinions thereon with respect to said first and second bevel gears, and the axial position of said pinion shaft is automatically controlled by the balance of axial thrust forces on said bevel pinions by said bevel gears produced by torque transmitted from said bevel pinions to said bevel gears.
Claim 3
Dependent Claim
48 words
The gear train of claim 1 including: first and second intermediate shafts, said first and second bevel gears being respectively mounted thereon; and gear means interconnecting said first and second intermediate shafts with a single main gear for the balanced transmission of power through the two power paths.
Claim 4
Dependent Claim
39 words
The gear train of claim 2 wherein: said gear means includes first and second main pinions in gear tooth engagement with said main gear, and said first and second intermediate shafts respectively drive said first and second main pinions.
Claim 5
Dependent Claim
22 words
The gear train of claim 3 wherein: said first and second bevel gears are on the same side of said pinion shaft.
Claim 6
Dependent Claim
115 words
The gear train of claim 4 including: said first and second intermediate shafts rotate in opposite directions; first and second output bevel pinions respectively carried by said first and second shafts; first and second output bevel gears respectively in gear tooth engagement with said first and second output bevel pinions, each of said output bevel gears carrying one of said main pinions in gear tooth engagement with said main gear, one of said output bevel gears having its main pinion on one side thereof and the other of said output bevel gears having its main pinion on the other side thereof so that both said main pinions drive said main gear in the same direction.
Claim 7
Dependent Claim
27 words
The gear train of claim 5 wherein: said first and second intermediate shafts are parallel to each other and at right angles to said bevel pinion shaft.
Claim 8
Dependent Claim
28 words
The gear train of claim 3 wherein: said first and second bevel gears are in engagement with said bevel pinions on opposite sides of said bevel pinion shaft.
Claim 9
Dependent Claim
28 words
The gear train of claim 7 wherein: each of said paths includes a further gear reduction pair so each of said power paths has three gear pairs therein.
Claim 10
Dependent Claim
20 words
The gear train of claim 8 wherein: said further gear reduction pair is a bevel pinion and bevel gear pair.
Claim 11
Dependent Claim
18 words
The gear train of claim 7 wherein: said first and second intermediate shafts are parallel to each other.
Claim 12
Dependent Claim
26 words
The gear train of claim 10 wherein: said first and second intermediate shafts are each at an acute angle with respect to said bevel pinion shaft.
Claim 13
Dependent Claim
23 words
The gear train of claim 10 wherein: said first and second intermediate shafts are substantially at right angles to said bevel pinion shaft.
Claim 14
Dependent Claim
27 words
The gear train of claim 7 wherein: said first and second intermediate shafts have axes which are directed to intersect with the axis of said main gear.
Claim 15
Dependent Claim
18 words
The gear train of claim 9 wherein: said first and second intermediate shafts are parallel to each other.
Claim 16
Dependent Claim
23 words
The gear train of claim 14 wherein: said first and second intermediate shafts are substantially at right angles to said bevel pinion shaft.
References Cited (Backward Citations)
US2552864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |