Brakes – Wheel – Axially movable brake element or housing therefor
Reexamination Certificate
1999-05-06
2001-06-05
Graham, Matthew C. (Department: 3613)
Brakes
Wheel
Axially movable brake element or housing therefor
Reexamination Certificate
active
06241052
ABSTRACT:
The present invention relates generally to an integrated aircraft wheel, brake and axle, and in particular to the piston housing and stators of the brake connected non-rotatably with the brake axle which is connected to a brake torque-take-out arm(s) and brake rod(s), and rotors connected non-rotatably with a drum drive attached to a wheel half.
Aircraft brakes have previously comprised basic structural elements such as a torque take-out arm integral with a piston housing, a brake rod, a torque tube, a plurality of stators connected non-rotatably with the torque tube, and a plurality of rotors connected non-rotatably with an inboard wheel half. Chambers et al U.S. Pat. No. 4,944,370 discloses the use of a drum drive that is connected with the inboard wheel half and providing splines for non-rotatable connection with the rotors. It is highly desirable to reduce the weight and improve the stability of aircraft landing systems by combining certain principle structures in order to shorten load paths and increase rigidity. It is desirable to provide a single structure for primary brake loads and primary wheel loads rather than two independently loaded systems. The dynamic response of such a wheel and brake system should be significantly reduced and its analysis simplified, compared with prior aircraft wheel and brake systems. The synergy provided by combining the axle, brake and wheel structural elements can lead to a reduction in bending load components which permits a reduction in section thickness, more robust and dynamically stable structures, more predictable stresses and dynamic response, a reduction in the number of parts, and in some cases an increase in wearable brake material and/or heat sink mass.
The present invention provides solutions to the above by providing an aircraft wheel and brake, comprising a brake axle having thereabout spline means, a piston housing having complementary spline means engaging the spline means of the brake axle, a plurality of stator discs connected non-rotatably with the spline means of the axle, a wheel mounted rotatably on the axle and including an axially extending brake drum connected therewith, the brake drum including a plurality of splines, a plurality of rotor discs connected non-rotatably with the splines of the drum, and bearing means located between an end of the drum and the piston housing.
REFERENCES:
patent: 2043933 (1936-06-01), Sohl
patent: 3038559 (1962-06-01), Hirzel
patent: 3357519 (1967-12-01), Anderson et al.
patent: 3829162 (1974-08-01), Stimson
patent: 3977631 (1976-08-01), Jenny
patent: 4944370 (1990-07-01), Chambers et al.
Allied-Signal Inc.
Graham Matthew C.
Palguta Larry J.
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