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:
Sep. 07, 1976
Filed:
Oct. 28, 1975
Applicant:
Inventors:
Henry B Chambers, Santa Inez, CA (US);
Clair W Tellefson, Santa Barbara, CA (US);
Tony H Balsillie, Goleta, CA (US);
Assignee:
Hydranautics, Goleta, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E02C / ; B66B / ; B63C / ;
U.S. Cl.
CPC ...
61 65 ;
Abstract
A ship lifting apparatus, or drydock, is formed by a pair of parallel, spaced apart piers which define a slip in which is located a platform on to which a ship can be floated. The platform is raised or lowered by a plurality of chain jacks mounted in aligned rows on each of the piers. One of the chain jacks is a master jack and has chain link-engaging latches controlled by a cam and follower while the other chain jacks are slave jacks being actuated by connection to each other and the master jack by tensioned cables attached to their latch actuating mechanisms.