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:
Jun. 03, 2008
Filed:
Mar. 14, 2005
Tim Muhl, Slinger, WI (US);
Kyle E. Nelson, Cedarburg, WI (US);
Reinhard E. Sander, Wauwatosa, WI (US);
Matthew Tourdot, Whitewater, WI (US);
Tim Muhl, Slinger, WI (US);
Kyle E. Nelson, Cedarburg, WI (US);
Reinhard E. Sander, Wauwatosa, WI (US);
Matthew Tourdot, Whitewater, WI (US);
Rite-Hite Holding Corporation, Milwaukee, WI (US);
Abstract
A hydraulic system for operating dock levelers, vehicle restraints, and other types of loading dock equipment includes one or more features that prolong the life of the hydraulic fluid. A hydraulic reservoir with a desiccant filled breather cap or a hermetically sealed pliable reservoir minimizes the hydraulic fluid's exposure to condensation and atmospheric moisture. The system can be used for prolonging the life of both biodegradable and- non-biodegradable hydraulic fluids. In some embodiments, the system includes an acceptably biodegradable fluid having a combination of properties that makes the fluid particularly suitable for loading dock equipment.