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:
Mar. 07, 1989
Filed:
Oct. 16, 1984
Applicant:
Inventor:
David Greenhow, Hamilton, CA;
Assignee:
Stelco Inc., Hamilton, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B66C / ;
U.S. Cl.
CPC ...
294 6721 ;
Abstract
A lifting device includes lower arm and upper arms and an intermediate portion bridging between the arms. A suspension link is pivoted at its bottom to the upper arm, and has a hook latch at its upper end for engagement with a crane hook. A telescopically guided spring exerts a separative force between a location on the link and a further location on the upper arm, which force tends to pivot the link toward the closed end of the hook. The latch has a strike panel which can be contacted by the crane hook in order to bring the latch into engagement position. The intermediate portion of the lifting hook is provided with a horizontally slidable shock absorber casing.