US 11,944,415 B2
Systems and methods for measuring blood pressure
Cristiano Dalvi, Lake Forest, CA (US); Marcelo M. Lamego, Cupertino, CA (US); Massi Joe E. Kiani, Laguna Niguel, CA (US); Jeroen Poeze, Rancho Santa Margarita, CA (US); and Hung The Vo, Fountain Valley, CA (US)
Assigned to MASIMO CORPORATION, Irvine, CA (US)
Filed by MASIMO CORPORATION, Irvine, CA (US)
Filed on Mar. 3, 2021, as Appl. No. 17/191,052.
Application 17/191,052 is a continuation of application No. 16/381,516, filed on Apr. 11, 2019, granted, now 10,980,432.
Application 16/381,516 is a continuation of application No. 14/450,030, filed on Aug. 1, 2014, granted, now 10,555,678, issued on Feb. 11, 2020.
Claims priority of provisional application 61/933,681, filed on Jan. 30, 2014.
Claims priority of provisional application 61/862,223, filed on Aug. 5, 2013.
Prior Publication US 2021/0330195 A1, Oct. 28, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. A61B 5/0235 (2006.01); A61B 5/022 (2006.01); F16K 1/30 (2006.01); F16K 17/40 (2006.01)
CPC A61B 5/0235 (2013.01) [A61B 5/02233 (2013.01); F16K 1/302 (2013.01); F16K 1/303 (2013.01); F16K 13/04 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A blood pressure measurement system, comprising:
an inflatable cuff configured to encompass a limb of a patient;
a chamber assembly configured to house a gas canister having gas for inflating the inflatable cuff;
a valve assembly coupled to the chamber assembly; and
a gas pathway between the valve assembly and the inflatable cuff, wherein the valve assembly includes:
a valve comprising a high pressure cavity, a low pressure cavity, a first channel providing a gas pathway between the high pressure cavity and the low pressure cavity, and a second channel providing a gas pathway between the low pressure cavity and a valve output,
a channel cover and a first pressure ring located within the high pressure cavity,
a spring exerting an upward force on the channel cover and the first pressure ring to create a seal between the high pressure cavity and the first channel, and
a rod extending from the low pressure cavity to the high pressure cavity via the first channel and exerting a downward force on the channel cover to provide a gas pathway between the high pressure cavity and the first channel.