Richard A Griffith

US Patent:

7837466, Nov 23, 2010

Filed:

Apr 8, 2007

Appl. No.:

11/697729

Inventors:

Richard J. Griffith - Kirtland Hills OH, US
William Koenig - Kirtland OH, US

International Classification:

A61C 3/00

US Classification:

433 17, 433 10

Abstract:

An orthodontic device includes a bracket having a body and the body includes external surfaces. An archwire passageway is formed in the body. An aperture extends from one of the external surfaces of the body to the passageway. A pawl is attached to the body and includes stop and cam surfaces which extend into the aperture. An extendable archwire includes an adjustment portion having a locking surface and a loop-spring therein and the adjustment portion is inserted into and through the passageway. The pawl and the locking surface form a ratchet. The cam surface of the pawl interengages the extendable archwire as the extendable archwire is extended through the bracket under the application of force to the extendable archwire. The stop surface of the pawl interengages the locking surface of the adjustment portion of the extendable archwire preventing retraction of the extendable archwire upon discontinuation of the application of force.

US Patent:

7871267, Jan 18, 2011

Filed:

May 29, 2009

Appl. No.:

12/475181

Inventors:

Richard J. Griffith - Kirtland Hills OH, US
William Koenig - Kirtland OH, US

International Classification:

A61C 3/00

US Classification:

433 24, 433 17, 433 10

Abstract:

An orthodontic device includes a bracket having a body and the body includes external surfaces. An archwire passageway is formed in the body. An aperture extends from one of the external surfaces of the body to the passageway. A pawl is attached to the body and includes stop and cam surfaces which extend into the aperture. An extendable archwire includes an adjustment portion having a locking surface and a loop-spring therein and the adjustment portion is inserted into and through the passageway. The pawl and the locking surface form a ratchet. The cam surface of the pawl interengages the extendable archwire as the extendable archwire is extended through the bracket under the application of force to the extendable archwire. The stop surface of the pawl interengages the locking surface of the adjustment portion of the extendable archwire preventing retraction of the extendable archwire upon discontinuation of the application of force.

US Patent:

8591226, Nov 26, 2013

Filed:

Jan 15, 2011

Appl. No.:

13/007621

Inventors:

Richard J. Griffith - Kirtland Hills OH, US
William Koenig - Kirtland OH, US

International Classification:

A61C 3/00

US Classification:

433 24, 433 18

Abstract:

An orthodontic device includes a bracket having a body and the body includes external surfaces. An archwire passageway is formed in the body. An aperture extends from one of the external surfaces of the body to the passageway. A pawl is attached to the body and includes stop and cam surfaces which extend into the aperture. An extendable archwire includes an adjustment portion having a locking surface and a loop-spring therein and the adjustment portion is inserted into and through the passageway. The pawl and the locking surface form a ratchet. The cam surface of the pawl interengages the extendable archwire as the extendable archwire is extended through the bracket under the application of force to the extendable archwire. The stop surface of the pawl interengages the locking surface of the adjustment portion of the extendable archwire preventing retraction of the extendable archwire upon discontinuation of the application of force.

US Patent:

44252897, Jan 10, 1984

Filed:

Aug 30, 1982

Appl. No.:

6/412634

Inventors:

Ly J. Lee - Columbus OH
James F. Stevenson - Hudson OH
Richard M. Griffith - Akron OH

Assignee:

The General Tire & Rubber Company - Akron OH

International Classification:

B29F 300

US Classification:

264 401

Abstract:

A method of producing an extrudate is disclosed in which on-line adjustments are made to size and shape deviations by varying the temperature conditions in the extruder and by varying the relative speeds along the extrusion line. The temperature conditions can be adjusted by varying the temperature of the stock while maintaining a fixed relationship of the die temperature to the stock temperature to produce deviations in the thickness of the extrudate with respect to the width of the extrudate, and by varying the temperature of the die with respect to the temperature in the stock to produce variations in different thicknesses of the extrudate. The relative speeds along the extrusion line can be varied by changing the speed of the screw in a cold-feed extruder, by changing the feed rate for a hot-feed extruder, or by changing the speed of the take-away device which regulates the speed by which the extrudate is taken away from the extruder.

US Patent:

46093362, Sep 2, 1986

Filed:

Oct 17, 1984

Appl. No.:

6/661635

Inventors:

James F. Stevenson - Hudson OH
Thomas E. Codispoti - Akron OH
Richard M. Griffith - Akron OH
Harry L. Hutch - Stow OH

Assignee:

GenCorp Inc. - Akron OH

International Classification:

B29C 4792
B29C 4978

US Classification:

425135

Abstract:

A rotatable accumulator roll which may move substantially horizontally or vertically is disposed between the die of an extruder and a take-away conveyor to minimize the effects of output surging of the extrudate from the die of the extruder in order to maintain substantially the dimension of the extrudate as delivered to a constant speed take-away conveyor. Variable force is applied to the roll to maintain tension on the extrudate.