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. 28, 1984
Filed:
Nov. 04, 1981
Applicant:
Inventors:
William R Mentzer, Shady Grove, PA (US);
Vincent Bernabe, Jr, Newville, PA (US);
Assignee:
Kidde, Inc., Saddle Brook, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B66C / ;
U.S. Cl.
CPC ...
52115 ; 52632 ; 212268 ;
Abstract
A multi-section hydraulically operated telescoping crane boom includes a manual fly section which may be safely extended and retracted, securely latched in the extended position and pin locked by remote operation of a biased hydraulically powered latching plunger and a biased cooperative hydraulically powered locking pin both embodied in a static pressure hydraulic circuit which includes a pressure-responsive indicator to indicate when the latching plunger is engaged. The circuit also includes safety interlocks for the cooperative latching plunger and locking pin preventing their operation in improper sequence.