Abstract: The present disclosure relates to an air ventilator for an automobile, comprising: a housing (100) comprising a flow path (110) through which air is blown; a wind direction control unit (200) comprising a louver (210) to adjust a wind direction of the air; a function carrier (300) installed in the wind direction control unit (200); a shaft (400) comprising a coupling portion (410) formed on first side portion of the shaft (400), wherein the function carrier (300) is mounted on the coupling portion (410) such that the function carrier (300) is rotatable, and an output bevel gear (420) formed on a second side portion of the shaft (400); and a pair of dampers (500) coupled to a hinge (600) so as to be foldable, wherein each of the pair of dampers (500) comprises an input bevel gear (510) to be engaged with the output bevel gear (420).

Abstract: A fluid control system may comprise a pressurized fluid path; at least two sensors for determining a state of fluid within the main fluid path; an isolation valve; and fluid-filled connection paths between the main fluid path and each of the at least two sensors. The connection paths may comprise first sensing tubes connected between the main fluid path and the isolation valve; the isolation valve; and second sensing tubes connected between the isolation valve and the at least two sensors. Upon closure of the isolation valve, the connection paths may be interrupted so that the sensors may be isolated from the main fluid path and so that they may be removed from the system without a need to de-pressurize or drain the fluid from the main fluid path of the system.

Abstract: A gate valve has a gate movable between open and closed positions within a valve body, and walls in the gate defining an equalizer port between opposite sides of the gate. The equalizer port is adapted and arranged to be shiftable by actuation of the gate between closed and opened positions and between opened and closed positions.

Abstract: A pressure regulator that has particular application for an anode input side of a fuel cell system to provide the desired large turn-down ratio. The pressure regulator includes at least two valves positioned in parallel where the first valve is smaller than the second valve. The first valve is opened and closed and the second valve is maintained closed at low flow rates. Once the flow rate is high enough, the first valve is maintained completely open, and the second valve is opened and closed to control the flow at high flow rates.

Abstract: A valve arrangement for stopping fluid passage through at least one flexible tubing is provided with a camshaft having at least one control cam which is designed as a sink in an otherwise closed circular surface of the camshaft for moving a press member which is retracted into an inactive relative position when radially aligned with the sink and which is protruded into an active relative position by the circular surface of the camshaft for then squeezing the associated portion of the flexible tube which is passed through a housing of the valve arrangement in a direction normal with respect to a longitudinal bore rotatably supporting the camshaft and also normal with respect to a radial bore which is arranged for radially guiding the press member.

Abstract: A fail-safe HVAC damper apparatus comprises a duct channel with a closure comprising one or more quadri-panel hinged elements, each with four panels connected by four parallel hinge pins. A gear shaft with a toothed gear is controllably rotated to linearly drive a spring-biased plate to move one of the hinge pins of each quadri-panel element between an open and a closed position. A damper may use blades of different sizes and be driven to begin an opening and/or closing action sequentially and/or very gradually. A drive motor may be activated to open or close the closure, e.g. by a smoke detector or other controller. Melting of a fuse in the duct channel serves to disengage a gear from a gear shaft, enabling a spring mounted plate to move the hinged elements to a default closed (or alternative open) safety position. Various gear shaft and gear structures are shown.

Abstract: A fail-safe HVAC damper apparatus comprises a duct channel with a closure comprising one or more quadri-panel hinged elements, each with four panels connected by four parallel hinge pins. A gear shaft with a toothed gear is controllably rotated to linearly drive a spring-biased plate to move one of the hinge pins of each quadri-panel element between an open and a closed position. A damper may use blades of different sizes and be driven to begin an opening and/or closing action sequentially and/or very gradually. A drive motor may be activated to open or close the closure, e.g. by a smoke detector or other controller. Melting of a fuse in the duct channel serves to disengage a gear from a gear shaft, enabling a spring mounted plate to move the hinged elements to a default closed (or alternative open) safety position. Various gear shaft and gear structures are shown.

Abstract: A fail-safe HVAC damper apparatus comprises a duct channel with a closure comprising one or more quadri-panel hinged elements, each with four panels connected by four parallel hinge pins. A gear shaft with a toothed gear is controllably rotated to linearly drive a spring-biased plate to move one of the hinge pins of each quadri-panel element between an open and a closed position. A drive motor may be activated to open or close the closure, e.g. by a smoke detector or other controller. A meltable fuse in the duct channel may be connected to a disconnect which uncouples the gear shaft and toothed gear, and a spring moves the closure to a default closed or open position.