William B Gutierrez

US Patent:

43457134, Aug 24, 1982

Filed:

Apr 13, 1981

Appl. No.:

6/254020

Inventors:

William S. Gutierrez - San Francisco CA
Lee Gropper - Los Altos CA
Hugh O. Brown - Campbell CA

Assignee:

Beckman Instruments, Inc. - Fullerton CA

International Classification:

B04B 706

US Classification:

233 1B

Abstract:

In accordance with the present invention, there is provided an air driven centrifuge having an access door to a rotor chamber housing a rotor seat and a rotor having a plurality of turbine flutes formed in the underside thereof. Air jet means in the rotor seat are provided for supporting and spinning the rotor on an air cushion in the chamber. Means are provided to prevent the opening of the access door when pressurized air is supplied to the air jets, and means are provided to delay for a predetermined period, the opening of the door after the supply of pressurized air to the air jets is discontinued.

US Patent:

42141796, Jul 22, 1980

Filed:

Mar 15, 1979

Appl. No.:

6/020894

Inventors:

Kenneth E. Jacobson - Fremont CA
William S. Gutierrez - San Francisco CA

Assignee:

Beckman Instruments, Inc. - Fullerton CA

International Classification:

H02K 1100
B04B 902
H01H 3502

US Classification:

310 68B

Abstract:

An improved rotor imbalance detector for a centrifuge comprising a rotatable electrically conducting ring; means to support and insulate the conducting ring from the centrifuge spindle shaft, and yet permit rotational movement of the conducting ring with respect to the support means, when the conducting ring is struck by the centrifuge drive spindle during an imbalance condition, means for de-energizing the power supplied to the centrifuge motor which rotates the drive spindle, and an electrically conducting lead in electrical contact with the conducting ring and the de-energizing means.

US Patent:

43220304, Mar 30, 1982

Filed:

Mar 14, 1979

Appl. No.:

6/020384

Inventors:

Kenneth E. Jacobson - Fremont CA
William S. Gutierrez - San Francisco CA
Williams G. Patterson - Palo Alto CA

Assignee:

Beckman Instruments, Inc. - Fullerton CA

International Classification:

B04B 900
F01M 900

US Classification:

233 23R

Abstract:

A lubricating system which is completely self contained within the vacuum environment of an electric direct drive system for an ultracentrifuge rotor. The lubricating system also functions as a cooling means for an electric motor within the drive system by the use of a unique cooling feed tube in the central portion of the drive system. An orifice in the top of the cooling feed tube will control the head of the lubricating medium within the system. Specific design of the fit between the direct drive assembly and the drive housing in conjunction with the head on the lubricating medium will regulate the drip rate of the lubricating medium to the bearings. The use of the unique lubrication and cooling system maintains the close tolerances of the various elements such as the high speed bearings of the drive system because the temperature of the overall drive system is controlled.