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. 21, 2016
Filed:
Oct. 18, 2012
Hyva Holding Bv, Alphen aan den Rijn, NL;
Rolf Van der Heide, Nieuwveen, NL;
HYVA HOLDING B.V., Alphen Aan Den Rijn, NL;
Abstract
A telescopic hydraulic cylinder includes an inner cylindrical tube and an outer cylindrical tube located concentrically about the inner cylindrical tube, and a guide ring for guiding the inner and outer cylindrical tubes. The guide ring has a cylindrical support surface with a center line and a guide surface and is mounted in a cylindrical groove. The guide surface slides along the inner surface of the outer cylindrical tube or the outer surface of the inner cylindrical tube. The guide surface has a curved surface with a curve radius and a tangent and the tangent to the curved surface and the center line form an inclination angle between zero and five degrees, and the curve radius is larger than the radius of the guide ring in the plane perpendicular to the center line.