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7298108 |
Control system for electric actuator
A driver comprises a direction-switching means which switches a rotation direction of a rotary driving source based on a direction instruction signal, a current amplifier/limiter which converts a...
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6938531 |
Reciprocal-movement power tool
A reciprocal-movement power tool includes a movable blade reciprocally movably provided on a main body. A receiving plate that supports an angle iron to be cut is supported on the main body at a...
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6879065 |
Linear actuator
An improved linear actuator incorporates a DC motor whose stator is secured to a frame is provided for. To improve operational longevity and reliability of a linear actuator, the improved actuator...
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6808056 |
Stop apparatus and method for gear actuators
A stop apparatus for a gear actuator includes a traveling stop nut that has adjustable positions and travels on a screw on an input shaft. The stop nut is mounted to threadably travel on the stop...
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6546825 |
Actuator
There is described an actuator comprising an outer tube and an inner tube. In the actuator there is provided a spindle co-operating with a bushing for creating the displacement of the actuator by...
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6513398 |
Electromotive adjustment assembly
An electromotive adjustment assembly, includes at least two spindles disposed in parallel spaced-apart relationship, and a motor unit coupled in driving relationship with the spindles for operating...
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6401557 |
Screw actuator
A screw actuator comprising first and second relatively rotatable members, a screw thread formation in the first member including a helical groove, spherical elements carried by the second member...
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6321611 |
Linear actuator travel limit apparatus
A linear actuator utilizing limit switches to implement reliable and effective travel limit functions. The actuator having a robust construction, lower part count, smaller dimension, and lower...
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6101889 |
Ball screw and nut linear actuator assemblies and methods of constructing and operating them
A ball screw and nut linear actuator has a motor and a ball nut and screw assembly in side by side disposition. Gearing connects with the motor shaft to drive the screw and a housing for the...
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5811139 |
Device for fixing a ball screw/nut mechanism safe from turning
In a device for fixing a ball screw/nut mechanism, including a ball screw and a ball nut, safe from turning. The ball screw/nut mechanism generates a linear movement to displace a first subassembly...
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5809833 |
Linear actuator
A linear actuator includes a motor having a rotatable output shaft, a lead screw having a worm gear thread, a forward end and a rear end, a worm gear drive train connected between the motor output...
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5673593 |
Overrunning nut for linear actuator
A simple, inexpensive and reliable screw type linear actuator includes a drive screw, a nut disposed thereon, and a reciprocating drive tube radially disposed over at least a portion of the drive...
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5635808 |
Method and system for controlling the motion of a rotary drive of a rotary index table assembly
Method and system are provided for controllably driving a rotary drive of a rotary index table assembly utilizing a PLC which receives various sensor signals including a feedback signal from a...
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5542744 |
Non-adjustable linear drive for articulated furniture
A linear drive for articulated furniture having pre-determined extended and retracted positions. These devices heretofore have been designed to be adjustable, but customer adjustment frequently...
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5503045 |
Drive assembly for controlling a powered device
A drive assembly for a valve includes a motor, a transmission which is coupled to the motor and the valve, and a manual drive unit having a shaft which is arranged to be driven by a handwheel. The...
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5461935 |
Slip clutch linear actuator
A linear actuator of the present invention includes a hollow drive tube. A slip clutch having front and rear camming surfaces is housed in the tube for rotation about an longitudinal axis. The slip...
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5402984 |
Jack mechanism having positive stop means for its crank handle
A jack mechanism having a crank handle that drives a linear motion control all nut and threaded screw. Two rods are included to provide a positive stop in each direction of the jack's limit so as...
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5351797 |
Retraction system for a power tool drive spindle
A system for retracting the drive spindle of a power tool includes a drive shaft which has a spline portion and a threaded portion. During normal operation, the drive spindle is rotated by...
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5346045 |
Electrically powered actuator
A linear actuator has reversible electric motors driving a screw-threaded shaft engaging a roller nut. A tubular housing attached to the nut has at its remote end an internal seating member and...
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5345835 |
Fitting for shutting off a flow
A fitting, in particular for shutting off a flow, includes a housing. A fixed threaded part is axially displaceable and fixed against relative rotation in the housing. A rotatable threaded part is...
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5319991 |
Motor coupling with angular compliance
A reversible drive system is provided that is particularly adaptable to low-power drives in which precision mechanical control must be obtained with the lowest possible cost and the highest...
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5299678 |
Limit switch mechanism for garage door opener
An adjustable limit switch mechanism for controlling the operation of an electric motor of a garage door opener over a selected range of movement including a motor driven threaded shaft supporting...
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5255882 |
Setting device with a nut controllable by a spindle
A setting device for the control surface of a projectile, which includes a drivable spindle or actuated screw which is screwed through the intermediary of a nut which is secured against rotation....
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5231888 |
Ball screw device with internal motors
A ball screw device with internal motors comprises a shaft provided with a ball screw groove and a ball spline groove, a ball screw nut threaded on the shaft with balls interposed therebetween, a...
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5230416 |
Automatic stop device with sliding yoke for electric motor
The device comprises at least one lead screw (2) driving a sliding yoke (23) whose guide bar (22) is mounted on a rocker arm (19). The lead screw actuates a switch (27) by means of a cam (28) via...
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5134731 |
Adjustable bed having adjustable height legs with synchronization feature
An adjustable bed comprises a head end, a foot end, and a planar mattress portion extending therebetween. The head end and foot end feature a drive screw and nut housing assembly. Each head end and...
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5117701 |
Screw-and nut type member for transmitting rotary motion
A transmission member includes a driving shaft (60) actuated by a control shaft (9), and a driven shaft (3) driven in rotation by a plate (61) provided with a driving thread and a driven thread....
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5111925 |
Device for automatically halting an electric motor after a certain number of revolutions
A device in which a sliding-gear nut is displaced on a threaded rod, one of these elements being driven in rotation by the motor to be controlled, the sliding-gear nut actuating a switch when it...
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5097933 |
Coupling for linear displacement transducer
The core of a liner displacement transducer is coupled to a rotatable movable member by a threaded stem which engages the member for rotation therewith and is axially slidable relative thereto. The...
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5094114 |
Apparatus for controlling rapid feed speed of movable bodies
In apparatus for controlling a rapid feed speed of a movable body, for example a table of a machine tool, by using a ball screw, there are provided a converting device for converting the rotation...
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5090513 |
Powered wheeled vehicle for the handicapped and others desiring assistance incorporating automatically locking swivelable and raiseable powered seat
A steerable electrically powered three-wheeled vehicle has an upstanding seat post mounting a seat thereon. The seat post is telescopically and revolvably received in a seat post support fixed to...
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5088339 |
Limit stop assembly for a screw and nut linear actuator
A screw and nut linear actuator has a threaded drive screw. A drive nut is threaded onto the drive screw and is axially translatable thereover by rotating the drive screw relative to the drive nut....
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5086900 |
Power converting mechanism
In the electric actuator of the present invention, the power converting mechanism is provided for converting the rotary power of the motor into linear power of the driven member, which needs no...
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5064044 |
Indexing apparatus
An indexing apparatus for a rotary table has a support shaft rotatably supported by a base member in which indexed terminal positions of the rotary table is determined by abutment of a stopper...
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5052537 |
Rotary travel limit stop apparatus
A rotary travel limit stop apparatus having a first rotary member (10) and second and third independently rotatable members (14 and 20) having slightly different numbers of gear teeth which engage...
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5041748 |
Lightweight, direct drive electromechanical actuator
An actuator (10) comprises a housing having sections (11, 11') joined by a band clamp (12). A high torque, low speed motor (14) is provided in the housing and has a rotor (17) associated with a...
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4953675 |
Simply supported secondary shafting system torque sensor
A torque sensor (10) is provided which avoids the problems of cantilevered screw and nut arrangements previously used in torque sensors. A long gear (15) receives a torque input from a shaft (14)...
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4923039 |
Interactive dual shaft input signal timing mechanism
A timing mechanism (10) is provided in which input gear (11) is fixed on one shaft (12) for operating one system such as a door to move between two positions. A differential nut (14) is also...
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4909765 |
Remote steering device for boats
An auxiliary steering device for outboard motors is disclosed. The auxiliary steering device includes an elongated housing defining a longitudinal axis. A reciprocating moving mechanism is coupled...
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4893704 |
Power door lock actuator
A power door lock actuator avoids back driving the motor during manual operation through the use of main and secondary shafts with opposed external threads that cooperate to send a drive member to...
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4877120 |
Actuator mechanism having adjustable stop
An actuator includes a main shaft (16) at the input of a speed reducing gear unit (29-32) which carries an overtravel stop mechanism. The grounded stops (68) are adjustable by a worm gear (72) to...
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4867295 |
Shock absorbing overtravel stop
A shock absorbing overtravel stop apparatus which includes a rotatable drive shaft 10, a screw shaft 15 driven by the drive shaft 10, and a nonrotatable travelling nut 30 threaded on and moveable...
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4864882 |
Torque limiting arrangement
A rotary to linear converter has a rotary input shaft and a linearly movable output element. A torque limiter arrests rotation of the shaft at a critical value of torque thereon. A friction device...
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4858491 |
Fail-free actuator assembly
A mechanical actuator assembly which automatically releases the load controlled by the actuator when the actuator jams or otherwise fails. The actuator assembly has two kinetic energy sources, the...
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4858481 |
Position controlled linear actuator
A linear actuator includes an electric drive motor which is connected to a drive screw through a gear train. Rotation of the drive screw causes the drive nut to move axially in order to impart...
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4848174 |
Shuttle transfer system
A high helix, multi threaded screw shuttle transfer assembly (10) for transferring high load devices at high speeds includes a screw (18) having threads (23). Standoff brackets (26) and bearing...
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4838403 |
Overtravel stop activated control valve
An overtravel stop for a rotary shaft (12) is disclosed having first and second embodiments. In the first embodiment, braking torque for the shaft is supplied by the restriction by valve (14) of at...
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4836346 |
Quickly-releasable clutch
A quickly-releasable clutch, comprises a linearly-movable member formed with a spiral thread on its outer surface; an angularly-movable member; an inner sleeve secured to the angularly-movable...
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4793458 |
Shift motor assembly for a two-speed axle
An improved shift motor assembly for selectively moving a shift rod or similar member between two gear-engaging positions for use, for example, in a two-speed axle assembly is disclosed. The...
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4760989 |
Valve operator
A valve operator powered selectively either by an electric motor or by a manually operable handwheel, the driving connections from both the motor and the handwheel to the valve including one or...
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