| 主权项 |
1. The combination of pump head parts of a scroll pump and an appliance for use in assembling the pump head parts, the combination comprising:
a frame; an orbiting plate scroll having a front side and a back side, and comprising an orbiting scroll blade at its front side; an annular metallic bellows having first and second ends; a stationary plate scroll having a front side and a back side, and comprising a stationary scroll blade at its front side; and assembly parts by which the stationary and orbiting scroll blades are angularly synchronized with one another during an assembly process in which the bellows is fixed to the orbiting plate scroll and to the frame, and the stationary plate scroll is fixed to the frame, the assembly parts comprising a fixture having a reference feature, and fasteners that fasten the bellows at the first end thereof to the orbiting plate scroll, the bellows at the second end thereof to the frame, and the stationary plate scroll to the frame, respectively, and wherein the fixture is configured so as to be mountable to an assemblage comprising the bellows and the orbiting plate scroll, and one of the orbiting plate scroll and the frame has another reference feature that can be aligned with the reference feature of the fixture, in the circumferential direction of the bellows, during the course of the assembly process. |
