ELLISON L DAVISON
Engineering in Gibsonia, PA
License number
Massachusetts 8179
Issued Date
Dec 6, 1957
Expiration Date
Jun 30, 2006
Type
Mechanical Engineer
Address
Address
Gibsonia, PA 15044
Professional information
Self-Rescue Breathing Apparatus
US Patent:
3980081, Sep 14, 1976
Filed:
Jun 25, 1975
Appl. No.:
5/590382
Inventors:
Harry N. Cotabish - Allison Park PA
Ellison Lloyd Davison - Gibsonia PA
Ellison Lloyd Davison - Gibsonia PA
Assignee:
Mine Safety Appliances Company - Pittsburgh PA
International Classification:
A62B 708
US Classification:
128147
Abstract:
A self-contained pendulum breathing main unit includes a first canister containing a bed of oxygen generating and carbon dioxide removing chemical, a breathing hose connected with the canister inlet at one side of the bed and a breathing bag connected with an opening to the opposite side of the bed. Tubular connections are associated with the cannister inlet and outlet for connecting a supplemental unit thereto. There also is a normally open valve for the inlet. Attachable to the main unit is a supplemental breathing unit provided with a canister containing the same kind of chemical as the first canister. The supplemental unit has a tubular inlet which closes the normally open valve and connects the second canister with the breathing hose when the two units are attached to each other. The second unit also is provided with a tubular outlet which connects the second canister with said opening in the first canister to put the second canister in communication with the breathing bag.
System For Metering Of Breathing Gas For Accommodation Of Breathing Demand
US Patent:
4827964, May 9, 1989
Filed:
Apr 23, 1987
Appl. No.:
7/041853
Inventors:
Michael R. Guido - Pittsburgh PA
Ellison L. Davison - Gibsonia PA
Ellison L. Davison - Gibsonia PA
Assignee:
Mine Safety Appliances Company - Pittsburgh PA
International Classification:
A61M 1600
US Classification:
137 811
Abstract:
An electronic-breathing mask system uses an electro-pneumatic valve for controlling air flow to a pilot. The system provides a continuous flow of air in an amount proportional to the pressure in the mask. The pressure in the mask is compared against a setpoint pressure to maintain a minimum derived pressure therein.