US 11,690,650 B2
Apparatus for extraction of at least one element from a cavity and a pressure limitation apparatus
Chong Yong Koh, Singapore (SG); and Kiat Jin Cheng, Singapore (SG)
Assigned to MATERNAL NEWBORN HEALTH INNOVATIONS, PBC, Parsippany, NJ (US)
Filed by MATERNAL NEWBORN HEALTH INNOVATIONS, PBC, Kinnelon, NJ (US)
Filed on Jul. 9, 2021, as Appl. No. 17/371,147.
Application 17/371,147 is a continuation of application No. 15/502,185, granted, now 11,097,992, previously published as PCT/SG2014/000403, filed on Aug. 27, 2014.
Prior Publication US 2021/0401464 A1, Dec. 30, 2021
Int. Cl. A61B 17/44 (2006.01); C05G 3/80 (2020.01); A61B 17/42 (2006.01); C05B 7/00 (2006.01); C05F 3/00 (2006.01); C05F 5/00 (2006.01); C05F 9/04 (2006.01); C05F 11/00 (2006.01); C09K 17/48 (2006.01); A61B 17/00 (2006.01)
CPC A61B 17/442 (2013.01) [A61B 17/42 (2013.01); C05B 7/00 (2013.01); C05F 3/00 (2013.01); C05F 5/004 (2013.01); C05F 9/04 (2013.01); C05F 11/00 (2013.01); C05G 3/80 (2020.02); C09K 17/48 (2013.01); A61B 2017/00557 (2013.01); A61B 2017/445 (2013.01); A61B 2017/447 (2013.01)] 1 Claim
OG exemplary drawing
 
1. A method of using a pressure limitation apparatus configured to operate with a birth assistance device when attached via a conduit, the method comprising:
applying a positive pressure to thereby inflate an inflatable section of the birth assistance device, wherein the inflatable section is inflated by a pressure limited pump comprising a central chamber for receiving and containing a gas, a first check valve allowing air to pass therethrough and into the central chamber and preventing back flow of air out of the central chamber, a second check valve allowing air to pass therethrough and out of the central chamber and preventing back flow of air into the central chamber, the central chamber including a compressible portion having a compressible volume and an incompressible portion having an incompressible volume, wherein the compressible portion and the incompressible portion remain in fluid communication and wherein a ratio of the incompressible volume and the compressible volume defines a pressure of the air passing through the second check valve; and compressing the compressible portion of the central chamber such that air flows into the inflatable section of the birth assistance device.