Torque motor

Claim 2

A torque motor comprising: a base having an aperture formed therethrough; a torsion shaft supported transverse of and in alignment with the aperture and the base in a parallel configuration with respect to the base and including end portions secured against movement relative to the base; a flapper extending through the aperture in the base and secured to the torsion shaft perpendicular thereto at a point midway between the end portions thereof; a metal bellows extending between the base and the torsion shaft, means forming a seal between the metal bellows and the base, and means forming a seal between the metal bellows and the torsion shaft; and means for selectively pivoting the flapper against the action of the torsion shaft.

Claim 3

A torque motor comprising: a base having an aperture formed therethrough; a torsion shaft supported transverse of and in alignment with the aperture and the base in a parallel configuration with respect to the base and including end portions secured against movement relative to the base; a flapper extending through the aperture in the base and secured to the torsion shaft perpendicular thereto at a point midway between the end portions thereof; a metal bellows extending between the base and the torsion shaft, means forming a seal between the metal bellows and the base, and means forming a seal between the metal bellows and the torsion shaft; and means for selectively pivoting the flapper against the action of the torsion shaft.

Claim 4

A torque motor comprising: a base having an aperture formed therethrough; a torsion shaft supported transverse of and in alignment with the aperture and the base in a parallel configuration with respect to the base and including end portions secured against movement relative to the base; a flapper extending through the aperture in the base and secured to the torsion shaft perpendicular thereto at a point midway between the end portions thereof; a metal bellows extending between the base and the torsion shaft, means forming a seal between the metal bellows and the base, and means forming a seal between the metal bellows and the torsion shaft; and means for selectively pivoting the flapper against the action of the torsion shaft.

Claim 5

A torque motor comprising: a base having an aperture formed therethrough; a torsion shaft supported transverse of and in alignment with the aperture in the base in a parallel configuration therewith and including end portions secured against movement relative to the base; a flapper extending through the aperture in the base and secured to the torsion shaft perpendicular thereto at a point midway between the end portions thereof; a pair of nozzles positioned on opposite sides of the flapper, and wherein the torsion shaft normally centers the flapper between the nozzles; a metal bellows extending between the base and the torsion shaft, means forming a seal between the metal bellows and the base, and means forming a seal between the metal bellows and the torsion shaft, and an armature secured to the mid-portion of the torsion shaft and electromagnetic means for selectively pivoting the armature against the action of the torsion shaft and thereby pivoting the flapper.

Claim 6

A torque motor comprising: a base having an aperture formed therethrough; a torsion shaft supported transverse of and in alignment with the aperture in the base in a parallel configuration therewith and including end portions secured against movement relative to the base; a flapper extending through the aperture in the base and secured to the torsion shaft perpendicular thereto at a point midway between the end portions thereof; a pair of nozzles positioned on opposite sides of the flapper, and wherein the torsion shaft normally centers the flapper between the nozzles; a metal bellows extending between the base and the torsion shaft, means forming a seal between the metal bellows and the base, and means forming a seal between the metal bellows and the torsion shaft, and an armature secured to the mid-portion of the torsion shaft and electromagnetic means for selectively pivoting the armature against the action of the torsion shaft and thereby pivoting the flapper.

Claim 7

The torque motor according to claim 1 wherein the flapper pivoting means comprises an armature secured to the midportion of the torsion shaft and electromagnetic means for selectively pivoting the armature against the action of the torsion shaft and thereby pivoting the flapper.

Claim 8

The torque motor according to claim 1 wherein the flapper extends from the torsion shaft through the aperture in the base to a blade, further including a pair of nozzles positioned on opposite sides of the flapper blade, and wherein the torsion shaft normally centers the flapper blade between the nozzles and the flapper pivoting means is operable to control the positioning of the flapper blade relative to the nozzles.

Claim 9

A torque motor comprising: a flapper; a torsion shaft for supporting one end of the flapper perpendicular thereto; a base for supporting the torsion shaft in a parallel configuration and including an aperture for receiving the flapper; a metal bellows forming a pressure seal around the aperture and the base and between the base and the torsion shaft; an armature secured to the torsion shaft for pivotal movement about the axis thereof; and electromagneTic means for selectively pivoting the armature and the flapper against the action of the torsion shaft.

Claim 10

A torque motor comprising: a flapper; a torsion shaft for supporting one end of the flapper perpendicular thereto; a base for supporting the torsion shaft in a parallel configuration and including an aperture for receiving the flapper; a metal bellows forming a pressure seal around the aperture and the base and between the base and the torsion shaft; an armature secured to the torsion shaft for pivotal movement about the axis thereof; and electromagneTic means for selectively pivoting the armature and the flapper against the action of the torsion shaft.

Claim 11

The torque motor according to claim 5 further including a pair of opposed fluid receiving nozzles, wherein the flapper extends to a blade which is normally centered between the fluid receiving nozzles by the torsion shaft, and wherein the electromagnetic means is operable to control the positioning of the flapper blade relative to the nozzles and thereby selectively restrict or prevent fluid flow into the nozzles.

Claim 12

The torque motor according to claim 5 wherein the base further comprises pole pieces positioned adjacent the opposite ends of the armature for limiting the pivotal movement thereof and means supporting the opposite ends of the torsion shaft for preventing movement thereof relative to the base.

Claim 13

The torque motor according to claim 7 wherein the means for supporting the ends of the torsion shaft includes means for preloading the torsion shaft.

Claim 14

A torque motor comprising: a base having an aperture formed through it; a torsion shaft supported on the base transverse of and in alignment with the aperture in a parallel configuration with respect to the base; a flapper including a blade and a rod extending from the blade through the aperture in the base and connected to the torsion shaft and extending perpendicular thereto; a bellows surrounding the aperture and the base and extending therefrom to the torsion shaft; means forming sealing connections between the bellows and the base and between the bellows and the torsion shaft; an armature mounted on the torsion shaft; and electromagnetic means for selective actuation to move the armature and thereby pivot the flapper against the action of the torsion shaft.

Claim 15

A torque motor comprising: a base having an aperture formed through it; a torsion shaft supported on the base transverse of and in alignment with the aperture in a parallel configuration with respect to the base; a flapper including a blade and a rod extending from the blade through the aperture in the base and connected to the torsion shaft and extending perpendicular thereto; a bellows surrounding the aperture and the base and extending therefrom to the torsion shaft; means forming sealing connections between the bellows and the base and between the bellows and the torsion shaft; an armature mounted on the torsion shaft; and electromagnetic means for selective actuation to move the armature and thereby pivot the flapper against the action of the torsion shaft.

Claim 16

The torque motor according to claim 9 further including nozzles positioned on opposite sides of the blade of the flapper for closure thereby in response to actuation of the electromagnetic means and wherein the torsion spring normally centers the blade of the flapper between the nozzles.

Claim 17

The torque motor according to claim 9 wherein the torsion shaft has an axis extending therethrough, wherein the armature is secured to the torsion shaft for pivotal movement about the axis, and wherein the base further comprises pole pieces positioned on opposite sides of the ends of the armature.