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:
May. 06, 2003
Filed:
Mar. 27, 2001
Applicant:
Inventors:
Merrill D. Martin, Oakland, CA (US);
Daniel J. Talken, Lafayette, CA (US);
Assignee:
Martin Family Trust, Oakland, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65H 2/950 ;
U.S. Cl.
CPC ...
B65H 2/950 ;
Abstract
A safety lock for locking an upstacker conveyor in an elevated position by means of a safety lock having a retractable member which is inserted between elevating members and the frame of the upstacker. Specifically, the safety lock is inserted between elevating members such as link members which rotate with respect to the frame as the frame is lowered and form an ever decreasing angle with the frame as the frame is lowered. By inserting a retractable member so that the angle between the structural member and frame can no longer decrease, the upstacker is effectively prevented from lowering accidentally.