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Class Information
Number: 318/584
Name: Electricity: motive power systems > Positional servo systems (e.g., servomechanisms) > Vehicular guidance systems with single axis control > Altitude or pitch control
Description: Subject matter in which the steering control is an altitude or pitch control.










Patents under this class:
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Patent Number Title Of Patent Date Issued
7702429 Electric flight control system for aircraft elevators Apr. 20, 2010
6586901 Methods and apparatus suitable for facilitating control of an aircraft rudder Jul. 1, 2003
6546317 Process and device for controlling at least one aerodynamic elevator surface of an aircraft during a takeoff Apr. 8, 2003
6526338 Electrical fly-by-wire system for operating an aircraft rudder Feb. 25, 2003
6448734 Method for current regulation of permanently excited synchronous motors for guided missiles having an electromechanical actuating drive for the rudder Sep. 10, 2002
5719566 Method and apparatus for detecting dormant actuator failure Feb. 17, 1998
5694014 Active hand controller redundancy and architecture Dec. 2, 1997
5489830 Control system with loadfeel and backdrive Feb. 6, 1996
5291113 Servo coupled hand controllers Mar. 1, 1994
5015934 Apparatus and method for minimizing limit cycle using complementary filtering techniques May. 14, 1991
4935682 Full authority engine-out control augmentation subsystem Jun. 19, 1990
4866361 Actuator rate saturation compensator Sep. 12, 1989
4829220 Electric flight control system with aircraft incidence protection May. 9, 1989
4825375 Apparatus and methods for apportioning commands between aircraft flight control surfaces Apr. 25, 1989
4797829 Flight control optimization system for multi-control surface aircraft Jan. 10, 1989
4787042 Limiting aircraft vertical acceleration response Nov. 22, 1988
4697768 Flight control system employing complementary filter Oct. 6, 1987
4684085 Aircraft automatic trim system Aug. 4, 1987
4683407 Authority limiter Jul. 28, 1987
4638229 Asymmetric torque switching for aircraft autopilot Jan. 20, 1987
4633404 Automatic deceleration of aircraft during descent Dec. 30, 1986
4617633 Direct lift command blending Oct. 14, 1986
4609988 Automatic prediction and capture of a preselected altitude for aircraft Sep. 2, 1986
4607202 Apparatus for automatically eliminating control force errors in aircraft, especially helicopters Aug. 19, 1986
4607201 Apparatus for improving the longitudinal or pitching stability of aircraft Aug. 19, 1986
4584510 Thumb-actuated two-axis controller Apr. 22, 1986
4583030 Pitch/trim control Apr. 15, 1986
4563743 Maneuver-force gradient system Jan. 7, 1986
4513235 Control apparatus Apr. 23, 1985
4490794 Altitude preselect system for aircraft without air data computer Dec. 25, 1984
4463297 Controller for mechanically actuated device Jul. 31, 1984
4456862 Augmented proportional navigation in second order predictive scheme Jun. 26, 1984
4442490 Aircraft pitch stabilization apparatus Apr. 10, 1984
4426607 Differential linkage apparatus for an aircraft series servoactuator apparatus Jan. 17, 1984
4418306 Directional data stabilization system Nov. 29, 1983
4382282 Trim control system for reduced drag May. 3, 1983
4345195 Strapdown multifunction servoactuator apparatus for aircraft Aug. 17, 1982
4304375 Electrically controlled elevator Dec. 8, 1981
4261537 Velocity vector control system augmented with direct lift control Apr. 14, 1981
4228386 Aircraft servoactuator apparatus Oct. 14, 1980
4171115 Stability augmentation system for relaxed static stability aircraft Oct. 16, 1979
4127248 Adaptive energy management for vertical speed control of an aircraft Nov. 28, 1978
4114842 Acceleration limited preselect altitude capture and control Sep. 19, 1978
4094480 Aircraft altitude hold system Jun. 13, 1978
4093903 Apparatus for extending the linear signal range of a rotary transformer type device Jun. 6, 1978
4081730 Multiple function generator for aircraft flight instruments Mar. 28, 1978
4071811 Model helicopter throttle governor/collective pitch control apparatus Jan. 31, 1978
4049223 Constant altitude auto pilot circuit Sep. 20, 1977
4046341 Aircraft angle-of-attack and sideslip estimator Sep. 6, 1977
4035705 Fail-safe dual channel automatic pilot with maneuver limiting Jul. 12, 1977

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