An intake device includes: an intake port; and a valve body which is disposed in the intake port and is rotated around a rotation axial line between an open/closed position, in which the valve body includes a valve body main body made of a resin, an elastically deformable seal portion formed to extend along an outer circumferential portion of the valve body main body, and a projection which is provided at a surface part adjacent to a region in which the seal portion is formed in the valve body main body, and has a shape that gradually becomes tapered toward a tip end side.

Exemplary embodiments are directed to butterfly valves, generally including a body assembly and handle assembly. The body assembly generally includes a body, a disc rotationally disposed inside an opening of the body, a cog, and a stem passing through the disc and the body. The handle assembly generally includes a handle body and a force ring. The stem can be rotationally interlocked relative to the disc and the handle assembly. The cog and the force ring can engage to rotationally secure the disc relative to the body. The handle assembly can include a lever and a grip, the force ring, the lever and the grip being pivotally secured relative to each other. The body can include a male radial protrusion and the body assembly can include a liner with a female radial groove. Methods of assembling and positioning a butterfly valve are also provided.

A valve having a valve body mechanically linked to the corresponding valve seat such that the valve seat automatically moves to a position spaced from the valve body as the valve body is moved from a closed position to an open position is disclosed. The resulting spaced-apart configuration of the valve body and valve seat in the open position eliminates impingement of the valve body on the valve seat in the open position.

A valve flap device having at least one valve housing having a shaft comprising a bearing surface and a valve axis, the shaft being rotationally supported about the valve axis by means of the bearing surface in the valve housing. A bearing element having a sliding bearing surface, wherein the bearing surface of the shaft contacts the sliding bearing surface. A bearing housing provided on the valve housing, in which the bearing element is supported at least in the radial direction to the valve axis, wherein the bearing element has an outer surface contacting the bearing housing. The support of the shaft is intended to be sufficiently tightly sealed, even for gaseous media, while simultaneously ensuring precise and statically determinate support. To this end, the bearing element is designed as a separate component coupled to the bearing housing about the valve axis with respect to the circumferential direction, such that the relative position between the bearing element and the bearing housing does not change in the circumferential direction when the shaft is rotated.

The present invention provides a hinged valve, comprising a handle, a valve body, a valve stem, a valve core, sealing rings, guide and a valve cover. The valve core is connected to the valve body by means of a hinge such that the valve core will be rotated around a rotation axis of the hinge. A locking hook and a positioning hole are provided on the valve stem. A positioning column, elastic buckles and guiding slot are provided on the guide. The positioning column is connected to the positioning hole of the valve stem and the guide is elastically assembled to the body of the valve stem under the effect of the elastic buckles of the guide, such that the guide and the valve stem will move synchronously without motion relative to each other. Rotating shafts and a guiding post are provided. The rotating shafts are rotatably connected to the connecting holes. The guiding post can move along the guiding slot in the guide such that the rotation of the valve stem will be transferred to the valve core via the slide by the guide and is converted into a rotation of the valve core around the rotation axis of the hinge so as to open or close the valve The valve of the present invention is structurally compact, easy to operate, open with a small torque, opened at a large angle, and allows for a large flow.

Exemplary embodiments are directed to butterfly valves, generally including a body assembly and handle assembly. The body assembly generally includes a body, a disc rotationally disposed inside an opening of the body, a cog, and a stem passing through the disc and the body. The handle assembly generally includes a handle body and a force ring. The stem can be rotationally interlocked relative to the disc and the handle assembly. The cog and the force ring can engage to rotationally secure the disc relative to the body. The handle assembly can include a lever and a grip, the force ring, the lever and the grip being pivotally secured relative to each other. The body can include a male radial protrusion and the body assembly can include a liner with a female radial groove. Methods of assembling and positioning a butterfly valve are also provided.

An intake device includes: an intake port; and a valve body which is disposed in the intake port and is rotated around a rotation axial line between an open/closed position, in which the valve body includes a valve body main body made of a resin, an elastically deformable seal portion formed to extend along an outer circumferential portion of the valve body main body, and a projection which is provided at a surface part adjacent to a region in which the seal portion is formed in the valve body main body, and has a shape that gradually becomes tapered toward a tip end side.

A butterfly valve for controlling gas flow is disclosed. The butterfly valve may include a valve body, the valve body defining a bore and a shaft configured for rotatable motion with respect to the valve body and including a shoulder. The butterfly valve may further include a disk housed within the bore, operatively coupled with the shaft, and configured to control gas flow through the bore based on a rotational position of the shaft relative to the valve body. The butterfly valve may further include a ball bearing operatively coupled with the shaft and including a ball and a race. The butterfly may further includes a spring configured to provide an axial force on the shaft, the axial force configured to press the shoulder of the shaft against the race of the ball bearing to prevent an outer edge of the disk from contacting an inner wall of the bore.

A butterfly valve for controlling gas flow is disclosed. The butterfly valve may include a valve body, the valve body defining a bore and a shaft configured for rotatable motion with respect to the valve body and including a shoulder. The butterfly valve may further include a disk housed within the bore, operatively coupled with the shaft, and configured to control gas flow through the bore based on a rotational position of the shaft relative to the valve body. The butterfly valve may further include a ball bearing operatively coupled with the shaft and including a ball and a race. The butterfly may further includes a spring configured to provide an axial force on the shaft, the axial force configured to press the shoulder of the shaft against the race of the ball bearing to prevent an outer edge of the disk from contacting an inner wall of the bore.

An adaptive valve assembly includes a pipe defining a passageway for conducting engine exhaust gases, a pivot shaft supported by the pipe, and a valve body coupled to the pivot shaft. The valve body is moveable between an open position where exhaust gas flow through the passageway is increased and a closed position where exhaust gas flow through the passageway is reduced. A resilient member biases the valve body toward the closed position. A retainer cooperates with the resilient member to define a valve stop for the valve body when in the closed position.