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:
Jul. 01, 2014
Filed:
May. 16, 2011
Timothy M. Kirkland, Willard, MO (US);
Timothy M. Kirkland, Willard, MO (US);
Tuthill Corporation, Burr Ridge, IL (US);
Abstract
A screw pump () with field refurbishment provisions has screws (), a base (), and shafts () for the screws (). The screws () have helical flights that intermesh during rotation, and extend between inner and outer ends (and). The shafts () extend between inner and outer ends (and), and are cantilevered from the base () from about the inner end () thereof. Each screw () is formed with a hollow core () for receiving its shaft () such that the screw () slips onto the respective shaft () therefor over the outer end () of its shaft (). The screw pump further includes a keyless locking mechanism (, or) intermediate each shaft () and screw (), which is operative to rotationally lock the shaft () and screw () together without a key or keyway.