公开(公告)号：US11300116B2

公开(公告)日：2022-04-12

申请号：US16551330

申请日：2019-08-26

Applicant: Regents of the University of Minnesota

Inventor： Saeed Hashemi ,  William Keith Durfee

IPC: F04B53/14 ,  F04B53/02 ,  F15B15/10 ,  F16J3/02 ,  F04B45/073 ,  B29C65/00

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.

公开(公告)号：US20210282986A1

公开(公告)日：2021-09-16

申请号：US17200339

申请日：2021-03-12

Applicant: United States Government as Represented by the Department of Veterans Affairs ,  REGENTS OF THE UNIVERSITY OF MINNESOTA

Inventor： Gary Goldish ,  Andrew Hansen ,  Gregory Voss ,  Saeed Hashemi ,  William K. Durfee

IPC: A61G5/04

Abstract: A wheelchair can comprise a frame and a plurality of wheels rotatably attached to the frame, and a motor coupled to the frame. A power source can be configured to power the motor. A drive shaft can be coupled to the motor. A first sprocket can be coupled to the drive shaft. A second sprocket can be configured to be rotationally fixed to a wheel of the plurality of wheels. A drive belt or chain can extend between the first sprocket and the second sprocket. An input device can be configured to receive an input from an operator and, in response to receiving the input, cause the motor to rotate.