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:
Apr. 04, 1978
Filed:
Oct. 24, 1975
Applicant:
Inventor:
Reginald P Whittingham, St. Thomas, PA (US);
Assignee:
Walter Kidde & Company, Inc., Shady Grove, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B66C / ;
U.S. Cl.
CPC ...
212 / ; 92118 ; 52115 ; 212 55 ;
Abstract
To facilitate transferring a massive crane boom from a regular crane carrier vehicle to an independent transport trailer, pivot pins for the rear ends of boom lift cylinders are held removably in journal boxes which are recessed into the crane turntable and are normally held captive in the recesses by shiftable locking dogs adapted to be extended over the tops of the journal boxes and to be retracted therefrom. The locking dogs are operated by turntable mounted power cylinders and safety means is provided to block accidental retraction of the locking dogs during normal crane usage.