Planetary gear transmission systems or components – With means to vary drive ratio or disconnect drive – Gear shiftable axially to disconnect or vary ratio
Reexamination Certificate
2007-06-19
2007-06-19
Wright, Dirk (Department: 3681)
Planetary gear transmission systems or components
With means to vary drive ratio or disconnect drive
Gear shiftable axially to disconnect or vary ratio
Reexamination Certificate
active
10911719
ABSTRACT:
The present invention provides a final drive for a vehicle including a compound gear set comprising an input, an output and first and second epicyclic gear sets, each epicyclic gear set comprising a sun gear, at least one planet gear, a planet carrier and a ring gear. The sun gear of the first epicyclic gear set in the final drive is rotatably coupled with the ring gear of the second epicyclic gear set.The final drive finds particular application in tracked vehicles which must be able to operate at both low torque, high speed and high torque, low speed conditions, for example in earth moving applications. Use of one or more final drives in a tracked vehicle gives the ability to operate in these two conditions without the need for potentially complicated and expensive modification of the tracked vehicle's present transmission.
REFERENCES:
patent: 1407226 (1922-02-01), Schubert
patent: 3184994 (1965-05-01), Stahl
patent: 4040309 (1977-08-01), Wood et al.
patent: 4215593 (1980-08-01), Shono et al.
patent: 4589304 (1986-05-01), Ashikawa et al.
patent: 4667538 (1987-05-01), Larson
patent: 4779699 (1988-10-01), Hatano
patent: 5168946 (1992-12-01), Dorgan
patent: 5186946 (1993-02-01), Valliéres
patent: 5195600 (1993-03-01), Dorgan
patent: 5226339 (1993-07-01), Donato et al.
patent: 5509491 (1996-04-01), Hall, III
patent: 5533943 (1996-07-01), Ichioka et al.
patent: 5813488 (1998-09-01), Weiss
patent: 5919109 (1999-07-01), Fleckenstein
patent: 6796921 (2004-09-01), Buck et al.
patent: 2001/0024990 (2001-09-01), Witzenberger
patent: 2 361 898 (2001-11-01), None
Yeaple F., “Planetary Gears Take on New Jobs”, Product Engineering, vol. 50, No. 5, May 1979, pp. 37-41.
Finnegan Henderson Farabow Garrett & Dunner
Perkins Engines Company Limited
Wright Dirk
LandOfFree
Two speed transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Two speed transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two speed transmission will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3820785