Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
January 12, 2016
Patent Application Number
13478947
Date Filed
May 23, 2012
Patent Citations Received
Patent Primary Examiner
Patent abstract
A multi-capacity hydraulic cylinder includes a hollow cylinder closed by a cylinder head, an annular piston moveable within the hollow cylinder to divide the interior of hollow cylinder into a first chamber and a second chamber, a hollow piston rod coupled to the piston and aligned with an opening in the piston, and a secondary rod moveable within the hollow piston rod to define a third chamber in the hollow piston rod, where the third chamber has a cross-sectional area that is less than the cross-sectional area of the first chamber.
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