Thermal element and parts therefor and methods of making the sam

Details Thermal element and parts therefor and methods of making the sam Thermal element and parts therefor and methods of making the sam

1977-06-22

1978-06-20

Woodiel, Donald O.

Measuring and testing

Gas analysis

Moisture content or vapor pressure

137242, 236 345, 277 24, 277DIG6, G01K 500

Patent

active

040954706

ABSTRACT:
A thermal element having a cylinder member carrying a piston member that projects out of an opening of an end of the cylinder member to be extended and retracted relative thereto upon changes of sensed temperature. A washer-like resilient seal member is carried by the end of the cylinder member and has an opening therethrough that press-fittingly receives the piston member therethrough in such a manner that an inner peripheral portion of the washer-like seal member is turned into substantially parallel sealing and wiping engagement with the stem while being substantially transverse to the remainder of the washer-like seal member, the washer-like seal member containing abrasive material therein to provide a scraping action of the inner peripheral portion thereof against the piston member to clean the same as the piston member is moved relative thereto.

REFERENCES:
patent: 3352316 (1967-11-01), Zahn

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