George J Maat

US Patent:

47765135, Oct 11, 1988

Filed:

May 13, 1987

Appl. No.:

7/051241

Inventors:

James J. Grinsteiner - Roselle IL
George J. Maat - Pompano Beach FL

Assignee:

Navistar International Transportation Corp. - Chicago IL

International Classification:

F01P 702
F16K 100

US Classification:

236 345

Abstract:

A choke type thermostat is provided with dual choke seals including a conventional primary choke and a secondary choke which seals with the valve seat of the thermostat prior to the sealing of the primary choke. The secondary choke provides additional sealing for the valve and also functions to strain the flow of coolant which is allowed to pass over the primary choke, thereby preventing sand or other debris from interfering with the sealing of the primary choke.

US Patent:

48567116, Aug 15, 1989

Filed:

Aug 24, 1988

Appl. No.:

7/236097

Inventors:

James J. Grinsteiner - Roselle IL
George J. Maat - Pompano Beach FL

Assignee:

Navistar International Transportation Corp. - Chicago IL

International Classification:

F01P 702

US Classification:

236 345

Abstract:

A choke type thermostat is provided with dual choke seals including a conventional primary choke and a secondary choke which seals with the valve seat of the thermostat prior to the sealing of the primary choke. The secondary choke provides additional sealing for the valve and also functions to strain the flow of coolant which is allowed to pass over the primary choke, thereby preventing sand or other debris from interfering with the sealing of the primary choke.