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:
Sep. 06, 1988
Filed:
Jul. 16, 1987
Applicant:
Inventors:
John E Mason, Owatonna, MN (US);
Herman A Clausen, Blooming Prairie, MN (US);
Gary J Lurken, Ellendale, MN (US);
Dale A Sellner, Owatonna, MN (US);
Assignee:
Wenger Corporation, Owatonna, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E06C / ;
U.S. Cl.
CPC ...
182-1 ; 182 17 ;
Abstract
An adjustable stairway is disclosed that is supported on a retractable, wheel mounted carriage. A locking mechanism selectively maintains the carriage in a lowered, ground engaging position for easy maneuvering of the stairway. The weight of the stairway urges the carriage into a raised position when the locking mechanism is released, allowing the stairway to rest on stationary foot pads.