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:
Jan. 20, 2015
Filed:
Jul. 30, 2012
Thomas Kowalski, Franklin, WI (US);
Frank R. Szpek, Franklin, WI (US);
Mark Medenwaldt, Oak Creek, WI (US);
David Bienfang, Racine, WI (US);
Thomas Kowalski, Franklin, WI (US);
Frank R. Szpek, Franklin, WI (US);
Mark Medenwaldt, Oak Creek, WI (US);
David Bienfang, Racine, WI (US);
Caterpillar Global Mining LLC, Peoria, IL (US);
Abstract
A hoist includes a platform, a drum, and a motor. The drum is supported by and configured to rotate with respect to the platform, and the motor is coupled to the drum and configured to rotate the drum. The hoist further includes a shaft having a splined section and an interlock system configured to constrain rotation of the shaft. The shaft is coupled to at least one of the drum and the motor, and communicates torque between the drum and the motor. The interlock system includes a keyed ring and an arm. The keyed ring is configured to slide onto and engage the splined section of the shaft. The arm extends from the keyed ring and is configured to provide leverage to limit rotation of the keyed ring, thereby interlocking rotation of the shaft when the keyed ring is engaged with the splined section of the shaft.