Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 7469881 | Hoist with detachable power and control unit A hoist is powered by a separate power unit. The hoist unit includes: a motor, a mounting connector, a spool, webbing, auto cut-off and a first portion of a mating electrical connector. The control unit includes a hollow pole, a hook, a second portion of the mating ... | 12/30/2008 |
| 7398957 | Winch having integrated inverter for providing AC power A winch mechanism is provided with an integrated inverter for providing AC electric power from a DC electric power source. The winch mechanism is also provided with a plug receptacle to allow standard AC electric devices to be plugged into the winch mechanism so tha... | 07/15/2008 |
| 7377486 | Support frame of a hoisting machine A hoisting machine, such as a cable block, includes a support frame having at least two face plates, which are detachably joined together and spaced apart by at least two longitudinal members. The support frame includes a simple structural design, in which the longi... | 05/27/2008 |
| 7377485 | Replacement motorized drive unit for boat lifts A three-phase drive motor is utilized to operate a boat lift. In one example, a drive motor arrangement for replacing manual drives on an existing boat lift winch shaft comprises a worm gear box with a worm driven by an integrally mounted motor on the worm gear box.... | 05/27/2008 |
| 7354028 | Method for controlling application of brakes in single drum hoist systems A method of damping the oscillations during an emergency stop of an ascending single drum hoist system in a shaft having a conveyance, the mechanical brakes applying a braking force to the drum and the drum rotating in a first direction having a speed, comprising ap... | 04/08/2008 |
| 7323646 | Hand and foot switch A hand operable switch includes an operating knob that is movable longitudinally or rotationally about a longitudinal axis of the hand operable switch. The operating knob is accessible from any circumferential location of the hand operable switch. A housing includes... | 01/29/2008 |
| 7318580 | Vehicle for materials handling and other industrial uses A heavy duty wheeled vehicle for an industrial environment is electrically driven by one or more switched reluctance motor traction drive system connected to the wheels. The switched reluctance motors are powered by an electrical generator that is driven by an engin... | 01/15/2008 |
| 7282826 | Driving device for sprocket wheels of chain drives A drive system for chain sprockets 1 of chain drives, more particularly for driving chain scraper conveyors or chain-drawn ploughs for underground mining, with a drive assembly formed of an asynchronous motor and a gear mechanism 4, the gear mechanism ... | 10/16/2007 |
| 7273133 | Elevator hoisting machine An elevator hoisting machine includes a first rotary part having a sheave, a brake-side end plate, and a brake disk integrally formed together, a second rotary part having a rotor with a permanent magnet and a motor-side end plate integrally formed together, wherein... | 09/25/2007 |
| 7243759 | Tapered coupler for coupling a motor to a hoist machine There is disclosed a coupling arrangement for coupling a motor to a hoist machine. The coupling arrangement comprises a first drum flange comprising an outer body having a first end and a second end, and an inner wall surface defining a cavity of substantially circu... | 07/17/2007 |
| 7237765 | Speed limiting system for lifting devices Speed limiter system to detect over speed and generate a signal to cut the power and if necessary operate brakes. It consist of the limiter itself, with a tension pulley. The limiter consists of weights connected by a mechanism that moves asymmetrically and by centr... | 07/03/2007 |
| 7227322 | Hoist with detachable power and control unit A hoist is powered by a separate power unit. The hoist unit includes: a motor, a mounting connector, a spool, webbing, auto cut-off and a first portion of a mating electrical connector. The control unit includes a hollow pole, a hook, a second portion of the mating ... | 06/05/2007 |
| 7195107 | Machine having pulley coupled to rotor and partially overlying stator, elevator system including machine, and drive method A machine includes a motor that includes a stator carrying a concentrated winding wound on teeth and a rotor rotatable about the stator. The rotor includes a tubular casing and permanent magnets, and a pulley coupled to the rotor. ... | 03/27/2007 |
| 7165653 | Elevator gearless traction machine construction A flexible construction for an elevator gearless traction drive machine having a frame that is easily adaptable to traction sheaves of differing widths and diameters while providing the necessary stability for the drive components without an additional structure. Th... | 01/23/2007 |
| 7126307 | Interface circuit for actuating an electrical device and circuit arrangement for actuating an electric motor therewith An interface circuit for actuating an electrical consumer, especially a pole-changing rotary-current induction motor, with a first contact element assigned to a signal line carrying an alternating voltage signal to generate at least two different control signals. A ... | 10/24/2006 |
| 7097157 | Modular adjustable hoist A modular adjustable hoist has a winch and a cable for hoisting an object. An electric motor is coupled to the winch for winding and unwinding the cable. An adjustable frame is used for securing the winch to a support or in a free standing position. The support can ... | 08/29/2006 |
| 7090200 | Actuator An actuator and control algorithm which provide an operator with the ability to intuitively and responsively maneuver heavy work-pieces with ease and precision. The structure of the apparatus may provide a hoist with a compliant sensing system to measure the weight ... | 08/15/2006 |
| 7080824 | Chain motor drive controller An improved chain motor drive controller is provided for a chain hoist. The system employs a position encoder including a position sensor located within the casing of the chain hoist to producing encoded electrical position signals. A motor pulley is mounted on the ... | 07/25/2006 |
| 7080825 | Chain motor drive control system An improved chain motor drive controller is provided for a chain hoist. The system employs a position encoder including a position sensor located within the casing of the chain hoist to producing encoded electrical position signals. A motor pulley is mounted on the ... | 07/25/2006 |
| 7080719 | Wrap spring brake A winch with a wrap spring brake is provided. The winch includes a rotatable drum configured to wind and unwind a cable. The cable may be connected to a load to be moved. A shaft is coupled to the drum such that rotation of the shaft causes rotation of the drum, the... | 07/25/2006 |
| 7055790 | Device for supporting a display screen A ceiling mounting device for a display screen having a positioning mechanism constructed such that it enables the display screen to be positioned in the opening in its home position such that the back side of the flat panel display is essentially flush with the cei... | 06/06/2006 |
| 7055805 | Self-tailing winch conversion A self tailing conversion is provided for a standard winch or capstan, particularly a sailboat winch. In one embodiment a self tailer or rope jaw device is secured to the top of the winch drum, and a feeder arm is attached to the stationary center stem of the existi... | 06/06/2006 |
| 7029133 | Adjustable security enclosure This invention relates to an apparatus for securing a projector. The apparatus is mountable to a ceiling drop pipe and comprises a cage and a drop pipe connector assembly. The cage has a plurality of interconnected members that together define an enclosure for housi... | 04/18/2006 |
| 7000903 | Wireline subsea metering head and method of use A system and method to measure positioning with respect to deploying a subsea load, the system comprising a subsea metering head having a position sensor; a controllable winch operatively connected to the winch flexible cable; and a controller operatively in communi... | 02/21/2006 |
| 6975057 | Rotary electric machine having a stator made up of sectors assembled together The invention relates to a rotary electric machine including a stator, powered by a polyphase current, having a magnetic circuit with teeth forming intervening slots for receiving electrical conductors. The magnetic circuit is made up of an assembly of sectors defin... | 12/13/2005 |
| 6974044 | System and device for controlling a load lifting device The invention relates to a system for controlling a load lifting device (1) with a controllable drive (2) and a lifting element (5) which is linked with the drive (2) and which is—at least in a non-operational position due to the gravit... | 12/13/2005 |
| 6956339 | Multiple hoist synchronization apparatus and method A hoist synchronization apparatus and method using a master controller operating software that provides a pulse reference to a slave controller. The slave commands its motor to rotate at the speed conveyed by that pulse reference. The slave controller monitors the p... | 10/18/2005 |
| 6952061 | Motor drive unit A motor drive unit 1 comprises an input shaft 10, a countershaft 20, a couple of helical gears, a housing 5 and a seventh bearing 57. The input shaft 10 is connected with the rotor shaft 60 of an electrical motor M fo... | 10/04/2005 |
| 6793203 | Hoisting gear The lifting gear includes a rotatably mounted drum (5) for winding up tension means (4), which is driven in rotation by at least one rotary driving device (19) comprising a rotary driving motor (21) acting on the drum (5) through a... | 09/21/2004 |
| 6712338 | Tahoe rescue tool—rescue hoist A rescue hoist is comprised of a receiver tube attached to a mounting bracket. The receiver tube is for attaching to a tow hitch on a motor vehicle. A motor is attached to a gear head. A flange on the gear head is attached to the mounting bracket. A capstan is attac... | 03/30/2004 |
| 6630757 | Elevator hoist apparatus An elevator hoist apparatus including a ventilation passage within a motor frame includes an inlet suction port at one end, a flow passage extending through the motor, and upper and lower discharge ports at the lower end of the motor frame. The upper disc... | 10/07/2003 |
| 6598859 | Multiple hoist synchronization apparatus and method A hoist synchronization apparatus and method using a master controller operating software that provides a pulse reference to a slave controller. The slave commands its motor to rotate at the speed conveyed by that pulse reference. The slave controller mon... | 07/29/2003 |
| 6595495 | Wire winding and ordering device for electromotive winch A wire winding and ordering device for an electromotive winch is installed at a front opening of a winch. The wire winding and ordering device includes a transversal displacement element and a longitudinal displacement element. The longitudinal displaceme... | 07/22/2003 |
| 6550746 | Apparatus for removing carcass in hog confinement buildings The invention is a system for removing dead animals from a building having a ceiling structure, a plurality of parallel elongated pens, and a dead animal depository station. The system includes a track that extends horizontally over the pens and is suspen... | 04/22/2003 |
| 6497380 | Drum winding apparatus In a drum winding unit, a cylindrical drum winding a wire is supported by paired supports fixed to a base structure so the drum freely rotates about a central axis of the drum. A drive unit for rotating the drum is disposed inside the drum. The drive unit... | 12/24/2002 |
| 6445094 | Hoisting drive for use in the iron and steel industry The invention relates to a hoisting drive comprising several linear motors, as well as to a linear slide track with a carriage. All primary parts and all secondary parts of the linear motors are mounted on the carriage. The hoisting drive comprises a clos... | 09/03/2002 |
| 6431103 | Winch A motor winch, which is suitable as a sheet or halyard winch (11) for sailing yachts, etc., has an integrated electric or hydraulic drive. The motor (52) is integrated into the winch in such a way that it is located within the winch body and in particular... | 08/13/2002 |
| 6371248 | Drive unit for elevators A drive unit has a traction sheave mounted on an end of a drive shaft supported by a bearing that is mounted on an extension of a bearing plate that is part of the motor casing. The traction sheave has an extension that serves as a brake drum. Mounted bet... | 04/16/2002 |
| 6261027 | Portable pulling apparatus The present invention provides a portable pulling apparatus suitable for mounting in an exit pit during installation of a pipeline. A portable pulling apparatus of the invention includes an elongated stake having a lower end portion configured for inserti... | 07/17/2001 |
| 6250607 | Self tailing power winch drive A winch drive comprising a portable power tool having a bit (4) shaped to fit the drive socket (11) at the top of a winch (12). The power tool includes a self-tailing device (14) and is preferably battery driven.... | 06/26/2001 |
