The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 17, 1987
Filed:
Sep. 05, 1984
Charles J Kis, Mukwonago, WI (US);
Kearney & Trecker Corporation, West Allis, WI (US);
Abstract
A gear change mechanism for a machine tool in which shifting forks with sliding gears and constant mesh gearing using clutch and/or brake shifting is eliminated. A shiftable gear mechanism is presented in a gear train for meshing engagement with any one of a plurality of gears for selectively varying the speed of the machine spindle. The shiftable gear mechanism includes a first rotatable shaft and a second shaft connected to a cluster gear positioned to slide and rotate the second shaft in relation to the first shaft. A cylinder apparatus is connected coaxially to the second shaft to slide the second shaft in a reciprocating manner along the first shaft so as to move the cluster gear and vary the gear ratios between the cluster gear and the other gears in the gear train. A bearing assembly is also utilized in conjunction with the second slidable shaft so as to prevent any sliding action between the cluster gear and the shifting mechanism.