DAVID L RICHARDSON
Engineering in Lexington, MA

License number
Massachusetts 18891
Issued Date
Mar 1, 1963
Expiration Date
Jun 30, 2012
Type
Mechanical Engineer
Address
Address
Lexington, MA 02421
LicenseFiles verified this license of Nov 24, 2016 at the Mass.gov - Consumer Affairs and Business Regulation.

Professional information

David Richardson Photo 1

Food Oven With Even Heat Distribution

US Patent:
6517882, Feb 11, 2003
Filed:
Apr 13, 2001
Appl. No.:
09/834995
Inventors:
Mimmo Elia - Watertown MA
Anthony Patti - Wakefield MA
William E. Lyle - Malden MA
David L. Richardson - Lexington MA
James T. Cole - Algonquin IL
Assignee:
Gas Research Institute - Des Plaines IL
International Classification:
A23C 300
US Classification:
426523, 99330, 99475, 99476, 99480, 126 21 A, 219400
Abstract:
The cooking chamber is defined at least in part by at least two pairs of oppositely disposed first and second wall structures, each of the wall structures including at least one slot opening for the passage of air therethrough. The rotating valve is in heated air distributing communication with the first wall structure and in return air communication with the second wall structure of only one of the two pairs of oppositely disposed first and second wall structures at a selected point in time such that heated air is passed through the slot opening in the first wall structure into the cooking chamber and return air from the cooking chamber is passed through the slot opening in the oppositely disposed second wall structure and to the rotating valve for return to the heat source. The rotating valve is capable of rotation to be in heated air distributing communication with the first wall structure and in return air communication with the second wall structure of the other of the two pairs of oppositely disposed first and second wall structures at a subsequent selected point in time.

David Richardson Photo 2

Multi-Layer Griddle

US Patent:
6138554, Oct 31, 2000
Filed:
Mar 12, 1999
Appl. No.:
9/267564
Inventors:
David H. McFadden - Lexington MA
James T. Cole - Algonquin IL
Stephen A. Mariano - Watertown MA
David L. Richardson - Lexington MA
Assignee:
Gas Research Institute - Chicago IL
International Classification:
A47J 3710, H05B 300
US Classification:
99422
Abstract:
An apparatus for cooking food having a multi-layer cooking plate including a stainless steel sheet layer having a top surface and a bottom surface and a high thermal conductivity material layer metallurgically bonded to the bottom surface of the stainless steel sheet layer so as to provide intimate contact between the entire bottom surface of the stainless steel sheet layer and the high thermal conductivity material layer. Heat to the multi-layer cooking plate is provided by a fuel-fired burner disposed beneath the multi-layer cooking plate.

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