Dean Andra Graham

US Patent:

51269929, Jun 30, 1992

Filed:

Mar 18, 1991

Appl. No.:

7/670688

Inventors:

Joshua F. Lavinsky - Burbank CA
Dean S. Graham - Van Nuys CA
Gary D. Gibson - Burbank CA

International Classification:

G11B 358

US Classification:

369 71

Abstract:

A cleaner unit is provided for applying a liquid cleaning solution onto the surface of an information disk, such as a so-called compact laser disk or the like. The cleaner unit comprises a housing with a rotatable spindle adapted to support the information disk in a generally horizontal orientation, in combination with a circulation system having a rotatable pump impeller for spraying a jet of a cleaning solution onto the underside of the disk near the spindle. A drive motor is operated by a control circuit for initially rotating the spindle and impeller in a first direction for spraying the cleaning solution against the spinning disk, with the rotational disk movement causing the cleaning solution to spread radially outwardly as a film over the underside disk surface. The cleaning solution is thrown from the disk periphery and is captured by an outer contoured deflector shroud for recirculation to the pump impeller. At the conclusion of a short cleaning cycle, the control circuit reverses the direction of spindle and impeller rotation to spin the disk in an opposite or second direction for the duration of a short dry cycle, without applying cleaning solution to the disk.

US Patent:

D460482, Feb 23, 1999

Filed:

Nov 17, 1997

Appl. No.:

D/079452

Inventors:

Dean S. Graham - Van Nuys CA

International Classification:

0805

US Classification:

D 8356

US Patent:

52087956, May 4, 1993

Filed:

Mar 13, 1992

Appl. No.:

7/851243

Inventors:

Joshua F. Lavinsky - Burbank CA
Dean S. Graham - Van Nuys CA
Gary D. Gibson - Burbank CA

International Classification:

G11B 358

US Classification:

369 72

Abstract:

A cleaner unit is provided for applying a liquid cleaning solution onto the surface of an information disk, such as a so-called compact laser disk or the like. The cleaner unit includes a housing with a rotatable spindle (22) adapted to support the information disk in a generally horizontal orientation, in combination with a circulation system having a rotatable pump impeller (24) for spraying a jet of a cleaning solution onto the underside of the disk (12) near the spindle. A drive motor is operated by a control circuit for initially rotating the spindle and impeller in a first direction for spraying the cleaning solution against the spinning disk, with the rotational disk movement causing the cleaning solution to spread radially outwardly as a film over the underside disk surface. The cleaning solution is thrown from the disk periphery and is captured by an outer contoured deflector shroud (99) for recirculation to the pump impeller. At the conclusion of a short cleaning cycle, the control circuit reverses the direction of spindle and impeller rotation to spin the disk in an opposite or second direction for the duration of a short dry cycle, without applying cleaning solution to the disk.

US Patent:

D4137868, Sep 14, 1999

Filed:

Sep 28, 1998

Appl. No.:

D/094163

Inventors:

Dean S. Graham - Van Nuys CA

International Classification:

0805

US Classification:

D 8356