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:
Oct. 27, 1998
Filed:
Jan. 21, 1997
Applicant:
Inventors:
Donald S Indge, Belmont, MA (US);
William R Straker, Acton, MA (US);
Assignee:
W.R. Grace & Co.-Conn., New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
E04H / ;
U.S. Cl.
CPC ...
256-1 ; 256 59 ; 256D / ;
Abstract
An exemplary moveable guard rail system of the present invention, useful for preventing fork lift trucks from falling off flat bed trailers, comprises at least two guard rails connected sequentially to each other and to hinged supportive frame members. The guard rails can be moved between extended and retracted positions by hinged arm members which may be powered by hydraulic pistons. Preferably, gimbal bearing members are used for connecting the guard rail or rails to the hinged supportive frame members.