A butterfly valve (11) includes a valve body (13) having at least a surface formed of resin material and being formed therein with an internal flow passage, a valve stem (15) rotatably supported by the valve body (13), a valve element (19) connected to the...

A seal (42) for an air valve having a valve shaft (32) rotatably carried in a bore (36) formed in a body (11) and a valve head (34) carried by the valve shaft (32) to control air flow through an air passage (14) as the valve shaft (32) is rotated. The seal...

The flap device comprises a housing (2), a gas flow-throughable channel (4), which is formed in the housing, and a flap body (14), which is mounted on a shaft (12). An actuator is provided, by which the shaft is displaced in a rotating manner. A support un...

In a throttle valve device for an internal combustion engine, a stepped portion (51) is formed on an outer peripheral surface of an inner ring (41) on a bore side (on an air intake passage side) in order to limit movement of a lip portion (55) of a first l...

A carburetor for a scavenged two-stroke internal combustion engine has an enriched fuel-and-air mixing passage (26) extending through a housing of the carburetor (10). Engaged to the housing is a body of an air flow modular assembly (12) which carries a pr...

Between the drive housing (1) and the suction intake air pipe (7) is at least one opening (20) through which the pressure differences between the housing and air pipe are broken down. The minimum opening width of this opening is defined by the appearance o...

The throttle valve shaft (16) is held in bearing eyes (22,24) of a housing (12), and one end (20) projects through a holder element bore. The holder element (44) is fastened to the housing with its radial outer section and via screws (50). In the area of t...