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:
Feb. 14, 1978
Filed:
Jun. 21, 1976
Applicant:
Inventors:
Raymond C Frank, Brown City, MI (US);
Ronald R Frank, Lapeer, MI (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B60R / ;
U.S. Cl.
CPC ...
280166 ;
Abstract
A retractable step for camper-trailers, motor homes and other uses, and comprising; a supporting member which is mounted under a doorway and has a step member connected to it by pivotal linkage which enables the step member to be raised and retracted under the threshold of the doorway for storage or lowered and extended in front of it for use; and with means for biasing the step member into its usable position and other means responsive to vehicle engine vacuum pressure for automatically retracting it into storage.