A radiofrequency enabled filtering facepiece respirator is provided. The filtering facepiece respirator includes a facemask adapted to fit over the nose and mouth of a wearer, where the facemask comprising a mask body containing a filtering structure. A harness is coupled to the mask body for securing the facemask on the face of the wearer. A mechanical valve is coupled to a portion of the mask body proximate the wearer's mouth, where the valve is adjustable between a first mode of operation and a second mode of operation. In the first mode of operation, air is permitted to flow through the valve on exhalation but not on inhalation. In the second mode of operation, air is obstructed from flowing through the valve on exhalation and inhalation

A valve for one-way transfer of air from vacuum storage bags, including a body, a flat diaphragm made of a flexible material, and a holder for securing the diaphragm to the body; a central portion of the body includes an air passage; the diaphragm has a first position where the air passage is covered by a central portion of the diaphragm thus blocking air flow through the air passage, and a second position where the central portion of the diaphragm is reversibly moved away from the air passage thus allowing air flow through the air passage; the diaphragm is secured between the body and the holder, at its three or more distinct edge portions of the diaphragm. A vacuum storage bag equipped with the valve.

A hydraulic control apparatus includes an output-side oil passage into which oil from a first oil passage and oil from a second oil passage flow, and a pressure regulating check valve regulating a hydraulic pressure in the second oil passage. The pressure regulating check valve includes first and second elastic portions housed in a spool hole between a valve body and a bottom of the spool hole. A natural length of the second elastic portion is shorter than a distance between the valve body and the bottom when the valve body closes an inflow hole. The second elastic portion applies an elastic force to the valve body in a state in which the valve body opens the inflow hole.

A gas-filled resilient body and uses thereof are described. The gas-filled resilient body may be used as a valve member, as a spring or as a gas-propelled dispenser.

Deformable valves and atomizer designs for a vaporizer (e.g., electronic cigarette). The vaporizer may be used for vaporization of liquid and/or organic material. The vaporizer may enable enhanced flow control of fluid and may generate high quality and quantity of vapor efficiently. In some instances, flow path of the vaporizer may allow bulk fluid flow, e.g., in contrast to capillary flow, to deliver fluid to a vicinity of the vaporizer. In some instances, the vaporizer may utilize improved atomizer designs for vaporizing devices, where said designs can be configured optionally, with various embodiments of a breath-modulating deformable valve.

A one-way valve to control the release of pressurized gas from within a sealed container through a venting aperture. The valve comprises a layer of flexible material having an upper and a lower surface with a portion of the upper surface adhered to a surface of the container and overlaying the venting aperture. A channel is defined by a portion of the container and an adjacent portion of the flexible material which has not been adhered to the container. The channel is in communication with the venting aperture and an exhaust gas aperture in the layer of flexible material. The channel is operable between a closed and an open configuration upon gas pressure within the container exceeding a predetermined limit. When open the channel permits gas to flow from said container into the exterior atmosphere. When closed the channel restricts the flow of gas between the venting aperture and exhaust gas aperture.

A pressure operated shut off valve for a vehicle fluid distribution system, comprising at least one valve housing, a valve chamber enclosed by the valve housing, at least a first fluid entry port, at least a first fluid exit port, at least a first fluid inlet duct opening into the valve chamber, at least a first fluid outlet duct opening into the valve chamber, at least a first valve body slidably arranged in the valve chamber, the valve body being held closed against the valve seat and being operable by the fluid pressure provided in the inlet duct and acting on the valve body thus lifting the valve body from the valve seat, wherein a mechanical stop selectively blocking or unblocking the valve body upon actuating is provided. A fluid delivery device utilizing such pressure operated shut off valve.

A valve for an inflatable bladder is provided with a valve seat including an annular flange and flexible supports surrounded by the annular flange; a positioning member surrounded by the flexible supports, the positioning member including a central hole; a diaphragm having a central portion secured to the central hole and an outer edge releasably secured to a bottom of the valve seat; and a cap for securing onto the valve seat.

A reed valve 1 includes: a valve body 4; a valve seat 6 having a valve hole 3 for passage of a fluid J; a casing 8 accommodating the valve body 4; and a reed 10 including an arm part 18 having a first end portion 22 connected to the casing 8, and a valve body support part 20 connected to a second end portion 24 of the arm part 18 and supporting the valve body 4 so that the valve hole 3 can be opened and closed. When a first direction D1 is a flow direction of the fluid J in the valve hole 3, and a first surface 21 is a surface facing downstream in the first direction D1 among an inner surface of the casing 8, the first surface 21 includes a recess 27 facing the arm part 18.

A discharge valve is provided in a recirculation line through which gas discharged from a fuel cell stack recirculates to the stack. The discharge valve opens or closes a discharge line through which a fluid in the recirculation line is discharged. The discharge valve includes a valve body connected to the discharge line and a drive part disposed in the valve body to be movable vertically. A diaphragm is coupled to a lower end of the drive part and selectively opens or closes the discharge line based on the vertical movement. The drive part switches between a closed state in which the discharge line is closed by the diaphragm, a first opened state in which the discharge line is opened to a first opening degree, and a second opened state in which the discharge line is opened to a second opening degree greater than the first opening degree.