Class 254/292 - Electric

Subclass of Class 254 - Implements or apparatus for applying pushing or pulling force
Definition: Apparatus wherein at least one of the motors is operated
No. of patents: 24
Last issue date: 05/27/2008

Number	Title	Issue Date
7377740	Lifting device for a personal-transportation vehicle A preferred embodiment of a lifting device includes a mounting column having a first major portion extending in a first direction, and a second major portion fixedly coupled to the first major portion and extending in a second direction. The lifting device also comp...	05/27/2008
7293762	Modular lift assembly A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to the frame. A plurality of head blocks are connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or take-up main...	11/13/2007
7293761	Diagnostic system for cranes A hoist system for critical loads incorporates improved safety technology to monitor various possible fault conditions. For example, a command-not-operated function causes braking of the hoist when an encoder detects one of a group of conditions including a lack of ...	11/13/2007
7258325	Modular lift assembly A lift assembly having a drum rotatably mounted to a frame and linearly translatable with respect to the frame. A plurality of head blocks are connected to the frame along a helical mounting path, wherein linear translation of the drum during takeoff or take-up main...	08/21/2007
7243870	Portable studio hoist A portable studio hoist which can be positioned and secured in a studio pipe grid or other structural setting without the need for hard wired power supplies or fixed attachments. The portable studio hoist is designed to operate on standard single phase 120 volt powe...	07/17/2007
7191857	Hybrid vehicle and method for controlling the same A running motor for assisting an engine in driving a vehicle or singly driving the vehicle and an auxiliary unit motor for driving a compressor for an air conditioner are controlled by a common inverter via a changeover switch. According to this construction, the ru...	03/20/2007
7123801	Optical fiber cable with fiber receiving jacket ducts Optical fiber cables with a central strength member encircled by a jacket having ducts which are disposed around the strength member and which receive one or more optical fibers with jacket material between the ducts and the outer surface of the jacket. The optical ...	10/17/2006
7007428	Vertical telescopic stage accessories device A device having multiple support members telescopically contained therein, with each member having a set of lights, a set of curtains and various compartments for numerous stage accessories and allows for quick change of the lights and curtains that are used for dif...	03/07/2006
6969961	Method for controlling a rotation speed of a slave drive, a corresponding controller and a corresponding machine A method for controlling the rotation speed of a slave drive is described, where a reference rotation speed and a reference position is provided to a controller. The controller determines an estimated acceleration curve for the slave drive based on an instantaneous ...	11/29/2005
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
6729605	Cable winch hoisting device for stages A cable winch hoisting device for theatrical stages, whereby a plurality of elongated, rod-like holding girders are suspended on cables, and these holding girders are adjustable in height by varying the free cable length between the cable suspension and the holding ...	05/04/2004
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
5361565	Elevating system An elevating system especially designed for raising and lowering battens used in stages. The elevating system preferably uses two or more winch assemblies with synchronous motors coupled together in parallel to an AC inverter to provide smooth, ramped sta...	11/08/1994
5180541	Handling flask comprising a device for displacement of a load along a vertical axis The device comprises two winches (12, 12') fastened to the outer surface of a hollow body (2) having a vertical channel (3) in which the load (4) is displaced. Each of the winches (12, 12') comprises two drums (13a, 13b) driven by a common motor (14). The...	01/19/1993
5167401	Hoist drive and method for driving a double hoist carrying apparatus A hoist drive for a double hoist carrying member having a hold hoist drum, a hold rope connected to the hold hoist drum and from which the carrying member is suspended, and a hold motor for rotating the hold hoist drum to raise and lower the carrying memb...	12/01/1992
5106057	Stage set lift apparatus An apparatus for the motorized control of theatrical sets connected to manual lift units each comprising upper and lower pulleys upon which a line runs to raise and lower a counterweight operatively connected to a set on the stage by a plurality of lift l...	04/21/1992
4973893	Piston and drum drive system A drum and piston drive system incorporates within the interior of a drum used for reeling cable in and out, a reversible electric motor which drives the drum from the inside through a gearset. Also carried within the drum is a manifold structure includin...	11/27/1990
4899988	Fiber optic cable placing equipment The cable puller employs a conically tapered capstan and self-contained motor both carried on a readily collapsible and portable frame. The puller is adapted for placing inside of a manhole where the capstan is aligned with the duct through which the cabl...	02/13/1990
4666127	Winch system A payload can be transferred between two relatively movable stations for example two ships using a winch system having an inhaul winch and an outhaul winch. The barrel of the outhaul winch is driven by an outhaul motor through a torque convertor such that...	05/19/1987
4557465	Cable drive mechanism A cable drive mechanism wherein a cable member comprising a plurality of individual cables disposed in side by side relation to form a flat member is successively wrapped around at least one cable wheel in one rotational direction and around at least one ...	12/10/1985
4446587	Patient positioning device A patient positioning device characterized by a horizontal support beam, a pair of motors coupled to the support beam, a first cable and hook assembly associated with a first motor, a second cable and hook assembly associated with a second motor, and a mo...	05/08/1984
4353526	Electrical drive apparatus for a vertically displaceable blackboard The invention relates to electrical drive apparatus for a vertically displaceable blackboard. In order to obtain synchronous operation of such drive apparatus either one motor, one shaft, or two motors connected by means of an electrical shaft were employ...	10/12/1982
4248254	Retainer for toilet articles A retainer for toilet articles or the like includes a housing having front, back and side walls mutually defining a cavity, the back housing wall being adapted for mounting on a vertical building wall, and the front wall having at least two horizontally-s...	02/03/1981
4073476	Overhead crane with redundant safety features An overhead crane with redundant safety features is shown which utilizes two independently reeved hoisting systems and a dual element hook, whereby if one of the elements of the hook or one of the hoisting systems were to encounter a failure, the load bei...	02/14/1978

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Class 254/292 - Electric