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:
Apr. 12, 2022
Filed:
Aug. 26, 2019
Applicant:
Regents of the University of Minnesota, Minneapolis, MN (US);
Inventors:
Saeed Hashemi, Minneapolis, MN (US);
William Keith Durfee, Edina, MN (US);
Assignee:
Regents of the University of Minnesota, Minneapolis, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04B 53/14 (2006.01); F04B 53/02 (2006.01); F15B 15/10 (2006.01); F16J 3/02 (2006.01); F04B 45/073 (2006.01); B29C 65/00 (2006.01);
U.S. Cl.
CPC ...
F04B 45/0736 (2013.01); B29C 66/432 (2013.01); F04B 53/02 (2013.01); F04B 53/143 (2013.01); F15B 15/10 (2013.01); F16J 3/02 (2013.01); Y10T 29/49877 (2015.01);
Abstract
Hydraulic cylinders and methods of fabricating hydraulic cylinders, including long-stroke rolling diaphragm cylinders with any stroke length. In some embodiments, the cylinders are manufactured to have a stroke length to bore diameter ('stroke-to-bore') ratio optionally greater than 1:1. Various embodiments are suitable for use in a passive hydraulic body-powered wearable robot, for example.