US 11,752,062 B2
Pneumatic massage
Guilherme Hartenberg Watson, LaSalle (CA); Wade O'Moore, Belle River (CA); Horia Blendea, LaSalle (CA); Renato Colja, Windsor (CA); and Robert J. McMillen, Tecumseh (CA)
Assigned to LEGGETT & PLATT CANADA CO., Halifax (CA)
Filed by Leggett & Platt Canada Co., Halifax (CA)
Filed on Sep. 1, 2022, as Appl. No. 17/929,281.
Application 17/929,281 is a continuation of application No. 17/320,470, filed on May 14, 2021, granted, now 11,458,066.
Application 17/320,470 is a continuation of application No. 16/359,709, filed on Mar. 20, 2019, granted, now 11,039,975, issued on Jun. 22, 2021.
Application 16/359,709 is a continuation in part of application No. 16/116,433, filed on Aug. 29, 2018, granted, now 11,432,995.
Prior Publication US 2023/0028075 A1, Jan. 26, 2023
Int. Cl. A61H 9/00 (2006.01); B60N 2/90 (2018.01)
CPC A61H 9/0071 (2013.01) [B60N 2/976 (2018.02); A61H 9/0078 (2013.01); A61H 2201/0149 (2013.01); A61H 2201/0169 (2013.01); A61H 2201/1207 (2013.01); A61H 2201/1238 (2013.01); A61H 2201/1409 (2013.01); A61H 2201/5056 (2013.01); B60N 2/914 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A pneumatic module having an air passage formed therein, the air passage comprising:
an air inlet configured to receive a source of pressurized air;
a first subsystem including an air splitter in fluid communication with the air inlet, the air splitter in fluid communication with a second subsystem and a third subsystem, wherein the air splitter is configured to create two unequal air pressure fields to deflect an airflow from the air inlet to the second subsystem,
wherein the second subsystem includes
a first air bladder and a second air bladder each in fluid communication with the air splitter, and
a first feedback passage in fluid communication with the second air bladder and the first subsystem,
wherein the second subsystem is configured to create two unequal air pressure fields to deflect the airflow toward the first air bladder to inflate the first air bladder, wherein the second subsystem is configured such that when the first air bladder reaches a first threshold air pressure, a first backpressure from the first air bladder causes the second subsystem to switch and deflect the air flow to the second air bladder such that the second air bladder inflates and the first air bladder deflates, and
wherein the second subsystem is configured such that when the second air bladder reaches a second threshold air pressure, a second backpressure from the second air bladder is generated in the first feedback passage, wherein the second backpressure causes the air splitter to switch and deflect the airflow from the second subsystem to the third subsystem, and
wherein the third subsystem includes
a third air bladder and a fourth air bladder each in fluid communication with the air splitter, and
a second feedback passage in fluid communication with the fourth air bladder and the first subsystem,
wherein the third subsystem is configured to create two unequal air pressure fields to deflect the airflow toward the third air bladder to inflate the third air bladder, wherein the third subsystem is configured such that when the third air bladder reaches a third threshold air pressure, a third backpressure from the third air bladder causes the third subsystem to switch and deflect the air flow to the fourth air bladder such that the fourth air bladder inflates and the third air bladder deflates, and
wherein the third subsystem is configured such that when the fourth air bladder reaches a fourth threshold air pressure, a fourth backpressure from the fourth air bladder is generated in the second feedback passage, wherein the fourth backpressure causes the air splitter to switch and deflect to the airflow from the third subsystem to the second subsystem.