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:
Nov. 28, 2006
Filed:
Jan. 31, 2004
Shane Brueggen, Cordova, IL (US);
Shane Brueggen, Cordova, IL (US);
Deere & Company, Moline, IL (US);
Abstract
A vacuum pump for a seed planter includes a housing, an impeller rotated within the housing, and a motor or other drive. The housing has a central inlet and a circumferentially arranged outlet passage. The impeller vanes define air paths that are open to the outlet passage. The impeller has a central aperture for coupling to the output shaft of the drive and an impeller center cap screwed into the central aperture. The impeller has a curved conical center hub that surrounds the central aperture. The center hub and the center cap are configured to smoothly direct air flow to the passages between the vanes to reduce or eliminate a stagnant air region in a center of the impeller. The center cap can also be used as a tool to remove the impeller from the output shaft.