Air bearing assembly for rotational table

Details Air bearing assembly for rotational table Air bearing assembly for rotational table

1977-01-19

1978-02-28

Blix, Trygve M.

Cutlery

90 58B, 308DIG1, F16C 1700

Patent

active

040763390

ABSTRACT:
An improved air bearing assembly for rotatably supporting a rotary table of a machine on a fixed base. The bearing assembly includes a fixed annular bearing member which has an upper face and a lower face. The upper face has a surface area which is greater than the lower face. A rotatable annular bearing member is positioned in nesting and rotational relationship with the fixed bearing member. The rotatable bearing member has an upper surface and a lower surface with the lower surface having a greater surface area than the upper surface. The bearing members are operatively positioned and received in a space provided between the base and the rotatable table. Air conduits are provided for imparting pressurized air between the rotatable member and the base so that the force of the air pressure lifts the rotatable bearing member upwardly, thereby defining an air bearing between the base and the rotatable bearing member while the upper surface of the rotatable bearing member bears forcibly upwardly against the lower surface of the rotatable table and moves rotationally therewith while lifting. Air conduits are also provided in the fixed annular member for communicating pressurized air between the upper face of the fixed annular member and the rotary table so that the air pressure defines an air bearing between the table and the fixed annular bearing member.

REFERENCES:
patent: 3146037 (1964-08-01), Hooker
patent: 3708215 (1975-01-01), Wilcock et al.
patent: 3871721 (1975-03-01), Siebert
patent: 3910650 (1975-10-01), Kraus

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