Pneumatically operable drive unit with a temperature dependent i

Details Pneumatically operable drive unit with a temperature dependent i Pneumatically operable drive unit with a temperature dependent i

1997-11-25

1999-08-17

Denion, Thomas E.

Expansible chamber devices

With inspection window in expansible chamber wall portion

With lock

92 15, 92 23, 92130R, F01B 2526

Patent

active

059377305

ABSTRACT:
A drive unit is designed as a diaphragm drive with return springs for shifting an associated actuator, connected by a diaphragm plate and a driving diaphragm, into a safety position. The drive unit also includes actuating springs that are held in a compressed state by two nested sleeve-shaped counterbearings that are locked during normal operation and located coaxially with respect to the return springs. The lock is formed by a temperature-dependent joint.

REFERENCES:
patent: 4263839 (1981-04-01), Akkerman et al.
patent: 4442756 (1984-04-01), Goans
"Messen, Steuern und Regeln in der Chemischen Technik" 3rd Edition vol. III, Springer-Verlag 1981, p. 190.

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