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:
Jun. 21, 2022
Filed:
Jun. 28, 2017
Applicant:
Hewlett-packard Development Company, L.p., Houston, TX (US);
Inventors:
Mark Groenenboom, Sumner, WA (US);
Randall West, Vancouver, WA (US);
Tait A. Regnier, Vancouver, WA (US);
Robert Winburne, Vancouver, WA (US);
Jeffrey G. Bingham, Vancouver, WA (US);
Assignee:
Hewlett-Packard Development Company, L.P., Spring, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29C 64/245 (2017.01); B33Y 30/00 (2015.01); B29C 64/232 (2017.01); B66F 7/02 (2006.01);
U.S. Cl.
CPC ...
B29C 64/245 (2017.08); B29C 64/232 (2017.08); B33Y 30/00 (2014.12); B66F 7/025 (2013.01);
Abstract
In one example, a platform lift includes a rotationally stationary leadscrew to support a platform, a rotatable nut to drive the leadscrew up and down through a range of motion, a first spring to apply a continuous downward force to the leadscrew throughout the range of motion, and a second spring to apply a continuous upward force to the leadscrew throughout the range of motion.