| 摘要 |
<p>A fluid pump comprising an internally-toothed drive belt drivingly coupled to a correspondingly externally-toothed first pulley wheel and arranged over a belt guide, which preferably takes the form of a second pulley wheel, spaced from the perimeter of the first pulley wheel, a fluid-tight housing containing the drive belt and pulley wheel, and means for coupling the motion of the first pulley wheel and the drive belt to that of an external drive; the housing having a fluid inlet port communicating with a space between the pulley wheels and the belt guide, and a fluid outlet port closely adjacent the region at which the drive belt engages tangentially with the first pulley wheel with their respective teeth in partial engagement; whereby motion of the first pulley wheel causes fluid from the space between the pulley wheel and the belt guide to be drawn into the nip of the first pulley wheel and the drive belt and then to be expelled under pressure to the fluid outlet port.</p> |
