US 11,752,058 B2
Differential air pressure systems and methods of using and calibrating such systems for mobility impaired users
Eric Richard Kuehne, Los Gatos, CA (US); Christopher Loew, Newark, CA (US); Glen R. Mangseth, El Dorado Hills, CA (US); Kenneth R. Krieg, Fremont, CA (US); David P. Grenewetzki, Novato, CA (US); Clifford T. Jue, Santa Cruz, CA (US); and Trevor L. Donald, Buckinghamshire (GB)
Assigned to AlterG, Inc., Fremont, CA (US)
Filed by AlterG, Inc., Fremont, CA (US)
Filed on Oct. 16, 2020, as Appl. No. 17/73,267.
Application 17/073,267 is a continuation of application No. 15/993,136, filed on May 30, 2018, abandoned.
Application 15/993,136 is a continuation of application No. 13/423,124, filed on Mar. 16, 2012, abandoned.
Claims priority of provisional application 61/454,432, filed on Mar. 18, 2011.
Prior Publication US 2021/0267833 A1, Sep. 2, 2021
Int. Cl. A61H 1/00 (2006.01); A61H 9/00 (2006.01); A63B 69/00 (2006.01); A63B 71/00 (2006.01); A63B 22/02 (2006.01); A61H 1/02 (2006.01); A63B 22/00 (2006.01)
CPC A61H 1/0229 (2013.01) [A63B 22/0235 (2013.01); A63B 69/0064 (2013.01); A63B 71/0009 (2013.01); A61H 9/005 (2013.01); A61H 2201/0103 (2013.01); A61H 2201/0161 (2013.01); A61H 2201/0173 (2013.01); A61H 2201/1652 (2013.01); A61H 2201/5061 (2013.01); A61H 2201/5071 (2013.01); A61H 2201/5097 (2013.01); A61H 2203/0406 (2013.01); A61H 2203/0431 (2013.01); A61H 2230/80 (2013.01); A63B 2022/0094 (2013.01); A63B 2071/0018 (2013.01); A63B 2208/053 (2013.01); A63B 2220/51 (2013.01); A63B 2225/50 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A differential pressure system for improving mobility of a disabled user, comprising:
a pressure chamber with a seal interface configured to receive a portion of a disabled user's body and to form a seal between the disabled user's body and the pressure chamber, the pressure chamber configured to apply pressure to the portion of the disabled user's body while the disabled user's body is sealed in the chamber;
a platform within the pressure chamber to support the disabled user positioned in the seal interface;
a first load sensor within the pressure chamber configured to provide a first output of a load applied to the platform by the disabled user while the disabled user's body is sealed in the pressure chamber;
a second load sensor coupled to an access assist device outside of the pressure chamber positioned to be within reach of and to support the disabled user while the disabled user is on the platform, the second load sensor configured to provide a second output of the load applied by the disabled user to the access assist device; and
a processor configured to receive the first output and the second output, and calculating an actual weight of the disabled user using the first output and the second output and configured to calibrate the differential pressure system by generating a differential air pressure calibration relationship between pressure in the chamber and the actual weight of the user while the user is sealed in the chamber, wherein the actual weight is a total weight of the user measured by the first and second load sensors at pressure points.