Fluid pressure servomotor

Details Fluid pressure servomotor Fluid pressure servomotor

1993-04-14

1994-11-15

Look, Edward K.

Expansible chamber devices

Collapsible chamber wall portion

Wall portion formed of flexible material

92101, F16J 302

Patent

active

053637437

ABSTRACT:
A fluid pressure operated servomotor having a housing shell containing a flexible diaphragm forming a fluid pressure chamber with a port through the housing connectable for receiving a fluid pressure signal. The diaphragm has a rigid insert extending therethrough and sealed thereabout with a cup shape on the interior of the chamber and having a rod pivot surface formed on the exterior side of the diaphragm. A spring inside the chamber has one end registered in the cupped shape to bias the diaphragm insert in one direction. In one embodiment, the insert is shaped to have a rod pivot surface nested in the coils spring such that the rod pivot load resists lateral buckling of the spring; and, in another embodiment, a shroud is formed on the insert about the rod pivot surface for limiting rotation of the insert with respect to the rod end.

REFERENCES:
patent: 335033 (1886-01-01), Locke
patent: 1077472 (1913-11-01), Hofmann
patent: 3180235 (1965-04-01), Schmitz
patent: 3309967 (1967-03-01), Taplin
patent: 3730495 (1973-05-01), Elam
patent: 3762280 (1973-10-01), Kreuter et al.
patent: 4056043 (1977-11-01), Sriramamurty et al.
patent: 4251050 (1981-02-01), McInerney
patent: 4688774 (1987-08-01), Warmuth, II

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