| 摘要 |
1275386 Molecular vacuum pumps BALZERS PATENT UND BETEILIGUNGS A G 18 Jan 1971 [10 April 1970] 2434/71 Heading F1C A rotor disc or, as shown, a stator disc for a molecular vacuum pump, comprises a hollow region formed between parallel walls 3, 4, Figs. 1A and 1B, e.g. of sheet titanium, each provided with an annular array of radial slits 5 having inwardly bent lips 6, the slits being angularly staggered relative to each other so that there is no axial line of sight through the disc. The stator disc shown is secured to the pump housing by peripheral flange 1. The rotor disc has no peripheral flange, and the opposed lips are connected in pairs, e.g. by welding, Figs. 2A to 2D (not shown). |
