Wheel substitutes for land vehicles – Tracks or treads – With guide means for interfitting with sprocket wheel or roller
Reexamination Certificate
2009-02-09
2011-12-13
Kotter, Kip T (Department: 3617)
Wheel substitutes for land vehicles
Tracks or treads
With guide means for interfitting with sprocket wheel or roller
C305S199000
Reexamination Certificate
active
08075069
ABSTRACT:
A combination of a drive tumbler and a track includes a track made of a plurality of connected track shoes and a plurality of driven surfaces. The track is wrapped around the drive tumbler so that a plurality of the shoes are in contact with the drive tumbler. The drive tumbler has a plurality of drive surfaces and a circumferential rim surface that includes a plurality of shoe contact surfaces that each contact the inside surface of one of the track shoes that are in contact with the tumbler. The shoe contact surface has a shape such that a line normal to the tangent of the shoe contact surface does not pass through the axis of rotation of the drive tumbler, thereby allowing the shoe contact surfaces on the rim of the drive tumbler to transmit a tractive force to the track. A preferred drive tumbler comprises a center hub and a plurality of individual tooth members connected to the center hub by welds.
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Berco S.p.A., Track Chains, originally retrieved Feb. 8, 2008, from http://www.berco.com/html/ track—chains.html (2 pages).
CMMS Model Summary, D11T/D11T CD Track Type Tractor, retrieved Feb. 8, 2008, from http://cmms.cat.com/cmms/servlet/cat.dcs.cmms.serylet.GetModelSummary?dsfFlag=0&&... (1 page).
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Pech David J.
Zick Joel D.
Brinks Hofer Gilson & Lione
Kotter Kip T
Manitowoc Crane Companies, LLC
Shurtz Steven P.
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