United Technologies Corporation

Michael A Gillott

Kenneth P Hansen

Robert Sherman

Kenneth F Vosseller

Scott J Beloncik

The backlash spring of a fuel control linkage is enclosed by an elastomeric sleeve which absorbs the energy of multiple resonant modes stimulated in the spring by vibratory fields. Deflections of large amplitude in the spring are minimized thereby. The sleeve has a plurality of ribs which extend axially therein and which provide an interference fit with the coils of the spring. The sleeve ribs contact as many of the spring coils as possible but minimize interference of the sleeve with the motion of the spring during the normal articulation thereof.

Vibration damper

In a fuel management system, shutoff means in a fuel supply line (12) closes when the pressure at a port (28) on the shutoff means exceeds some predetermined level. A most selector valve (42) attached to the port (28) connects to two electrically and mechanically independent shutdown valves (50, 52). Actuating either valve (50, 52) pressurizes the port (28), closing the shutoff means and stopping all flow through the supply line (12).

Dual independent input hydraulic shutoff

In a fuel control, the body of a feedback resolver is isolated from vibratory fields within a housing in which it is mounted while maintaining alignment of its gear with a fuel control linkage. The resolver is isolated by disposing a first means radially about the feedback device, disposing a second means between the bottom of the feedback device and the housing and disposing a third means at the top of the housing, the means at the top of the housing and at the bottom of the housing being compressed such that the resolver maintains its axial relationship with the fuel control linkage while isolating the resolver from vibratory fields encountered within the housing.

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Somers, CT, United States of America

Michael A Gillott