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| Number | Title | Issue Date |
| 4307799 | Linear actuator A linear actuator for providing a thrust force for actuating various movable members, such as, for example lever arms, cranks, slides and valve flaps. The thrust force is applied by an extension rod that is arranged within a housing so as to extend in an ... | 12/29/1981 |
| 4261536 | Device for controlling the operating cycles of models A device for controlling the movements or operating cycles of models, for example, model airplanes, model ships, kites, etc., which are driven by a drive motor is provided which includes a screw spindle which is affixed at about the center of a shaft whic... | 04/14/1981 |
| 4238021 | End switch for a shaft driven through a large angle of rotation An end switch for use with a shaft and a drive which drives the shaft through a relatively large number of 360° angular rotations associated with an end position wherein the end switch is provided with a switching member and with a spindle drive means re... | 12/09/1980 |
| 4198786 | Locking device for a sliding door A sliding door of the type employed in public transport vehicles and driven by an electric motor comprises at least one door-leaf coupled with a nut mounted on an endless screw which is driven in rotation in order to open and/or close the door. The nut is... | 04/22/1980 |
| 4180187 | Automatic piston drive mechanism for use in caulking gun An automatic piston drive mechanism for use in dispensing flowable compound material through an orifice of a housing in which the material is contained. The housing may be that of a caulking gun or else that of a cartridge as insertable on a carriage of a... | 12/25/1979 |
| 4179944 | Fail safe redundant actuator An electromechanical actuator is provided which is capable of disconnecting the output shaft and the drive mechanisms in such a way that, in the event of either a rotational or translational failure during operation, the output shaft can be effectively fr... | 12/25/1979 |
| 4114747 | Switching bearing assembly for a motor-driven spindle A switching bearing assembly for a motor-driven spindle, e.g. a leadscrew adapted to drive a nut axially along the leadscrew, is provided with a bearing housing disposed between two fixed plates and biased centrally thereof by a plurality of compression s... | 09/19/1978 |
| 4111070 | Valve actuator and spring biasing cartridge A spring resistance cartridge assembly for a valve actuator is disclosed which offers resistance to movement in either direction of an axial member extending therein. The cartridge assembly has a base plate securable to an axial member and an opposing fix... | 09/05/1978 |
| 4107877 | Garage door operator and door obstruction sensing apparatus A garage door operator includes a drive screw, rotationally and longitudinally movable in a shuttle track or guide rail, and a screw-driven shuttle mounted on the track and connected to the door. A lever arm is attached to the screw at a rearward end ther... | 08/22/1978 |
| 4064981 | Limit stop Limit stop apparatus wherein a driven shaft rotates a predetermined number of revolutions in either direction whereupon a travelling nut assembly contacts a shock absorbing stop to terminate shaft rotation by frictionally jamming screw threads between the... | 12/27/1977 |
| 3971291 | Apparatus for cocking a breechblock An apparatus for cocking a breechblock of an automatic firing weapon equipped with an electric motor which is operatively connected through the agency of an electromagnetic coupling with a displacement mechanism for the breechblock in order to move the br... | 07/27/1976 |
