Abstract: An example safety device includes a storage member, a membrane disposed within the chamber, a material disposed within the membrane, and an actuator moveably attached to the membrane. The storage member has a main body that defines a first opening, a chamber, and a windowed portion. Each of the first opening and the windowed portion provides access between the chamber and an environment exterior to the chamber. The membrane has a first configuration and a second configuration. The material is contained within the membrane when the membrane is in the first configuration and is in fluid communication with the environment exterior to the membrane when the membrane is in the second configuration. The actuator is moveable between a first position and a second position such that movement of the actuator results in movement of the membrane from the first configuration to the second configuration.

Abstract: An example safety device includes a storage member, a membrane disposed within the chamber, a material disposed within the membrane, and an actuator moveably attached to the membrane. The storage member has a main body that defines a first opening, a chamber, and a windowed portion. Each of the first opening and the windowed portion provides access between the chamber and an environment exterior to the chamber. The membrane has a first configuration and a second configuration. The material is contained within the membrane when the membrane is in the first configuration and is in fluid communication with the environment exterior to the membrane when the membrane is in the second configuration. The actuator is moveable between a first position and a second position such that movement of the actuator results in movement of the membrane from the first configuration to the second configuration.

Abstract: An example safety device includes a storage member, a membrane disposed within the chamber, a material disposed within the membrane, and an actuator moveably attached to the membrane. The storage member has a main body that defines a first opening, a chamber, and a windowed portion. Each of the first opening and the windowed portion provides access between the chamber and an environment exterior to the chamber. The membrane has a first configuration and a second configuration. The material is contained within the membrane when the membrane is in the first configuration and is in fluid communication with the environment exterior to the membrane when the membrane is in the second configuration. The actuator is moveable between a first position and a second position such that movement of the actuator results in movement of the membrane from the first configuration to the second configuration.

Abstract: A regenerative blower includes an annular housing assembly that surrounds a rotating impeller and defines a toroidal flow channel, an inlet to admit fluid to the toroidal flow channel, an outlet to discharge fluid from the toroidal flow channel, a low fluid-pressure region of the toroidal flow channel proximate to the inlet, and a high fluid-pressure region of the toroidal flow channel proximate to the outlet. A non-contact interaction between concentric surface contours of the impeller and the housing assembly form opposed concentric fluid pathways between the impeller and the housing assembly from the high to low fluid-pressure regions of the toroidal flow channel. The opposed concentric fluid pathways are so convoluted as to restrict fluid from flowing therethrough from the high fluid-pressure region of the toroidal flow channel to the low fluid-pressure region of the toroidal flow channel.