Spacer of adjustable thickness

Details Spacer of adjustable thickness Spacer of adjustable thickness

1994-04-25

1995-11-14

Knight, Anthony

Rotary kinetic fluid motors or pumps

Smooth runner surface for working fluid frictional contact

403282, 403274, 29520, 411150, 411313, 384626, F16B 4300, F04D 2954, F04D 1904

Patent

active

054661196

ABSTRACT:
A stack of parts, such as the stator disks of a turbomolecular pump, the parts being stacked alternately with spacers, includes a spacer having a knife-shaped deformable portion. When the stack is installed for the first time, the portion is compressed so as to take up the tolerances of the stack between abutment surfaces, e.g. delimited by a pump body and a corresponding casing. The invention applies in particular to turbomolecular pumps and aims to eliminate the operations of adjustment, re-machining, or matching that are usually required when installing a stator assembly.

REFERENCES:
patent: 269412 (1882-12-01), Heaton
patent: 1098974 (1914-06-01), Reilly
patent: 2010569 (1935-08-01), Sitzler
patent: 2464152 (1949-03-01), Ralston
patent: 3405597 (1968-10-01), Elsner
patent: 4437784 (1984-03-01), Peterson
patent: 4502832 (1985-03-01), Becker
patent: 5052887 (1991-10-01), Novikov et al.
patent: 5195756 (1993-03-01), Wachter

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