Granted Patent B2

US 12,654,062 · App. 18/419,253 · Granted Jun 16, 2026

Inventors: Charles D. Remsberg (Mountain View, CA); David E. Lieberman (Tracy, CA); Michael P. Arnold (Modesto, CA)

Assignee: Lifeward CA, Inc.

A63B22/02A61B5/112A61B5/1123A61H1/0229A61H3/008A63B22/0023A63B71/0622A61H2201/5007A61H2201/5061A61H2201/5071A63B2071/065A63B2220/17A63B2220/18A63B2220/52A63B2225/02

Abstract

Claims (16)

1 . A method of providing a user specific calibrated differential air pressure exercise session, comprising:

sealing a user within a chamber of a differential air pressure system;

inflating the chamber;

increasing a speed of a moving belt of a treadmill in the chamber such that the user is walking within the chamber while the user is being unweighted by air pressure in the chamber;

collecting data from a first load cell and a second load cell in differential air pressure system;

determining a user specific unweighting calibration based on the collected data; and

operating the differential air pressure system to unweight the user according to the user specific unweighting calibration.

2 . The method of claim 1 , wherein collecting data includes successively changing air pressure in the chamber and collecting data from the first load cell and the second load cell associated with the successive air pressures.

3 . The method of claim 2 , wherein the user specific unweighting calibration is based on a linear interpolation between two successive air pressures.

4 . The method of claim 2 , wherein a difference in an unweighting level between successive unweighting levels is 1% unweighting.

5 . The method of claim 1 , wherein collecting data includes collecting at least 50 successive air pressure and load cell measurements.

6 . The method of claim 1 , wherein a starting air pressure of the chamber is 60 mm of H2O.

7 . The method of claim 1 , wherein the first load cell is disposed under a first rear corner of the treadmill; and the second load cell disposed under a second rear corner of the treadmill.

8 . The method of claim 1 , further comprising adjusting air pressure in the chamber based on signals from one or more load cells.

9 . The method of claim 1 , wherein the user is unweighted by not less than 20% of body weight.

10 . The method of claim 1 , wherein a final unweighting level used in generating the user specific unweighting calibration curve is collected at a 40% unweighting level.

Assignments (2)

Continuity (3)

References Cited (400)