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:
Oct. 05, 2021
Filed:
Dec. 01, 2016
Applicant:
Cascade Corporation, Fairview, OR (US);
Inventor:
Christopher M. Walthers, Gresham, OR (US);
Assignee:
Cascade Corporation, Fairview, OR (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B66F 9/18 (2006.01); B66F 9/22 (2006.01); F15B 11/028 (2006.01); F15B 3/00 (2006.01); F15B 11/032 (2006.01); F15B 11/16 (2006.01);
U.S. Cl.
CPC ...
B66F 9/183 (2013.01); B66F 9/22 (2013.01); F15B 3/00 (2013.01); F15B 11/028 (2013.01); F15B 11/032 (2013.01); F15B 11/161 (2013.01); F15B 2211/6303 (2013.01); F15B 2211/7107 (2013.01); F15B 2211/76 (2013.01);
Abstract
An improved hydraulic control system for a lift truck attachment having opposed clamp arms that selectively grip and release a load. The improved hydraulic system utilizes a secondary hydraulic force control circuit that increases the gripping force on the load independently of inward movement of the clamp arms.