ERNEST E YEO
Engineering in Wenham, MA
License number
Massachusetts 14090
Expiration Date
Jun 30, 1984
Type
Mechanical Engineer
Address
Address
Wenham, MA 01984
Professional information
Exhaust Head
US Patent:
4137953, Feb 6, 1979
Filed:
Oct 13, 1977
Appl. No.:
5/841969
Inventors:
Ernest E. Yeo - Wenham MA
Assignee:
Swanson-Erie Corporation - Erie PA
International Classification:
B65B 3104, G01M 302, H01J 938, H01J 942
US Classification:
141 65
Abstract:
A coupling head suitable to be supported on a transporting means for coupling an object to be evacuated to a vacuum line. The coupling has a ball valve and a poppet valve for connecting and disconnecting the vacuum and gas pressure to the object. Leaks in the object can be detected by a sensing device actuated by a bellows on the coupling head.