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:
Feb. 19, 2013
Filed:
Jun. 12, 2009
Marlin Tillaart, Brougham, CA;
Paul Giampuzzi, Mississauga, CA;
Marlin Tillaart, Brougham, CA;
Paul Giampuzzi, Mississauga, CA;
Dutchman Industries Inc., Brougham, CA;
Abstract
Two-stage double-acting hydraulic cylinders are described, in which a first, inner stage includes a piston rod and head movable within a cylinder and a second, outer stage has a cylindrical body adapted to move longitudinally between stop positions intermediate the ends of the first cylinder. The two stages are hydraulically linked to each other through the alternate introduction of hydraulic fluid selectively through an extension pressure fluid port and a retraction pressure fluid port a limited motion of the outer stage is obtained in a power stroke. Hydraulic power means of this kind is of particular value in powered apparatus for digging and transplanting trees, where minimization of the overall height of the apparatus is desirable.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile