Apparatus for extraction of at least one element from a cavity and a pressure limitation apparatus
AssigneeBecton Dickinson Holdings Pte. Ltd.
InventorsChong Yong Koh, Kiat Jin Cheng
Life of this patent
Estimating the term…
Abstract
There is provided an apparatus for extraction of at least one object from a cavity. The apparatus includes a sleeve including an inflatable section configured to surround the at least one object during inflation; a handle configured to enable a user to hold the sleeve, the handle defining a holding edge of an opening at a first portion of the sleeve; and a handle-mount mounted to a peripheral area around the opening, the handle-mount being for attachment of a pump used for inflating the inflatable section. There is also provided a pressure limitation apparatus configured to operate with a birth assistance device when attached via a conduit.
Claims16
A pressure limitation apparatus configured to operate with a birth assistance device when attached via a conduit to supply a positive pressure to inflate an inflatable section of the birth assistance device, the apparatus including a central chamber for 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 first compressible portion having a compressible volume and a second incompressible portion having an incompressible volume, wherein the first compressible portion and the second 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.
A pressure limitation apparatus configured to operate with a birth assistance device when attached via a conduit to supply a negative pressure to withdraw air from within a suction cup of the birth assistance device, the apparatus including a central chamber for 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 first compressible portion and the second 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.
Dependencies are inferred from the claim text.