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. 23, 2020
Filed:
Nov. 15, 2018
Applicants:
Paul Bradford Blackwelder, Medina, OH (US);
Andrew Paul Wasson, Wooster, OH (US);
Inventors:
Paul Bradford Blackwelder, Medina, OH (US);
Andrew Paul Wasson, Wooster, OH (US);
Assignee:
The Will-Burt Company, Orrville, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V 21/26 (2006.01); E04H 12/18 (2006.01); F21V 21/30 (2006.01); F21S 2/00 (2016.01); F21W 131/10 (2006.01); F21V 21/116 (2006.01); F21V 21/108 (2006.01);
U.S. Cl.
CPC ...
F21V 21/26 (2013.01); E04H 12/187 (2013.01); F21S 2/00 (2013.01); F21V 21/30 (2013.01); F21V 21/108 (2013.01); F21V 21/116 (2013.01); F21W 2131/1005 (2013.01);
Abstract
A folding light tower is provided that utilizes a 4-bar linkage mechanism which enables full vertical extension of the tower with the use of one actuator. The exemplary tower generally includes a base, a lower lift arm, and an upper lift arm. Spring elements are used near the rotating joints of the lower lift arm and upper lift arm of the tower. The spring elements act to preload the joints and help to remove play and movement when the tower is unfolded/during the vertical extension process.