Richard L Ford

US Patent:

20040138680, Jul 15, 2004

Filed:

Nov 25, 2003

Appl. No.:

10/722330

Inventors:

David Twitchell - Snellville GA, US
Richard Ford - Braselton GA, US
Eric Fuller - Smyrna GA, US

International Classification:

A61B017/50

US Classification:

606/131000

Abstract:

A microdermabrasion apparatus and system is provided. In general, the apparatus includes a housing having a first end and a second end, a suction cup located at the first end of the housing, a motor located within the housing, a pump located within the housing, an exfoliation tip mechanically coupled to a shaft that is mechanically coupled to the motor, the exfoliation tip being located within a vacuum space in the suction cup and a tube located within the housing and connected between the pump and the suction cup.

US Patent:

41744713, Nov 13, 1979

Filed:

Mar 27, 1978

Appl. No.:

5/890873

Inventors:

Richard D. Ford - Temple Hills MD
Ihor M. Vitkovitsky - Silver Spring MD

Assignee:

The United States of America as represented by the Secretary of the Navy - Washington DC

International Classification:

H01H 3900

US Classification:

200 6108

Abstract:

A modular opening switch for high currents providing high current-carrying apacity, high voltage hold-off capability and very short opening time. The switch operates on the principle of an explosively generated pressure which ruptures and then drives paraffin radially through a cylindrical current conducting tube, so that the paraffin provides an electrically insulative barrier between the ruptured portions of the conducting tube. Alternate cutting and bending rings, between which insulating rings are placed, are disposed around the periphery of the conductor tube. The insulating rings are tapered at the periphery of the conductor tube to provide void spaces into which the paraffin is driven and firmly packed without voids or cracks which deteriorate the insulating property of the paraffin.