Patent · US Expired

Thermostatic expansible material-working element

US3968692A · kind A · utility

19Cited by

2References

9Claims

0Family size

Assignee

Elektrowatt AG · CH

Inventors

Ernst Blattler · Obfelden, CH
Werner Roner · Feldbach, CH

Key dates

Filing date	Dec 30, 1974
Grant date	Jul 13, 1976
Priority date	—
Expiry date	Dec 30, 1994

Classification

Technology area (CPC G)Physics
CPC primaryG12B1/00
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A thermostatic expansible material-working element with a housing filled with the material and a pin-shaped work piston which is pointed at one end. The work piston with its pointed end extends through an opening in the housing into the internal compartment thereof and upon thermal expansion of the expansible material such piston is displaced out of the housing. According to the invention the expansible material is a molded body predominantly formed of polytetrafluoroethylene, polytrifluoroethylene or polytetrafluoroethyleneperfluoropropylene.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.