Hamilton Sundstrand Corporation

Sundstrand Corporation

Mark Walter Corcoran

Lubomir A Ribarov

Stephen Michael Bortoli

Michael John Giamati

Shin Katsumata

William E Seidel

Alan John Fahrner

Gregory C Hopkins

Geoffrey D Fenelon

A ram air turbine movable between a stowed position and a deployed position is provided including a rotatable hub assembly. A hub face is arranged at a first end of the rotatable hub assembly. The hub face has a non-planar configuration such that a limited portion of a surface area of the hub face is arranged within a plane oriented perpendicular to a direction of travel of an airflow upstream from the hub face when the ram air turbine is in a deployed position.

Ice-shedding spinner for ram air turbine

An aircraft fuel pump (1) is provided with a centrifugal impeller (2) and a stationary housing (3). A floating annular seal (4) mates with both the stationary housing and the rotating impeller thus providing sealing on two surfaces. The annular seal (4) comprises, in combination, a sealing material (5) positioned radially opposite the surface (6) of the impeller to be sealed, a backing ring (7) radially spaced from the sealing material for axially sealing against a surface (13) on a mating ring (15) of the stationary housing (3), and an elastomer (8) which is bonded to both the sealing material and the backing ring. The sealing material (5) is in the form of sealing material segments (9, 10, 11) which are arranged end to end with expansison grooves (12) remaining between the opposed ends for accommodating differences in thermal expansion between the impeller and the sealing material. The expansion grooves are in the form of a spiral to create a pumping action with relative rotation between the impeller and the sealing material to resist leakage of fuel through the expansion grooves.

Floating annular seal with thermal compensation

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Rockford, IL, United States of America

Mark Walter Corcoran