Class / Patent application number | Description | Number of patent applications / Date published |
254267000 | Having rotational speed governor for generating control impulse to rotation retarding means or drive | 9 |
20080265226 | Winch Assembly - A winch assembly ( | 10-30-2008 |
20090101877 | Electric motor driven traversing balancer hoist - A balancer hoist has an electric servomotor driving irreversible gearing in turn driving a hoist chain drive. A float mode and a manual mode are provided using two independent load sensors for sensing the load weight and force applied to a control grip. A traversing control is produced by a tractor carriage rolling on an overhead rail connected to a trolley also traveling on the rail and supported on upper hoist assembly. A load sensor interconnects the tractor carriage and upon hoist assembly to sense forces created by an operator pulling on the chain, which are used to control an electric motor on the tractor carriage driving a pinion gear engaged with a gear rack on the overhead rail to positively drive the carriage, trolley and upper hoist assembly along the rail. A stationary dual hoist system is also described in which two hoist assemblies are interconnected by a chain and sprockets to provide synchronized operation. | 04-23-2009 |
20110089388 | METHOD OF CONTROLLING ROTATION SPEED OF MOTOR OF SPEED-CONTROLLABLE HOIST DRIVE, AND HOIST DRIVE - A method according to the invention of controlling a rotation speed of a motor of a speed-controllable hoist drive comprises receiving a lift speed instruction; forming a final speed instruction by using initial information containing the lift speed instruction; and using the final speed instruction as a speed instruction for the rotation speed of the motor of the speed-controllable hoist drive. The method further comprises monitoring a position derivative of an actual value of a cable force. The initial information for forming the final speed instruction comprises the position derivative of the actual value of the cable force. | 04-21-2011 |
20130001488 | MODULAR LIFT ASSEMBLY - A modular lift assembly includes a frame, at least one head block connected to the frame, a drum rotatably connected to the frame about an axis of rotation and having at least one winding section, and a drive mechanism operatively connected to the drum for rotating the drum. In various examples, the lift assembly includes at least one loft block internal or external relative to the frame. The loft block is configured to guide a cable from the at least one head block to a load. The lift assembly can further include a load brake positioned along the axis of drum rotation to reduce risks associated with a drive or motor failure. | 01-03-2013 |
20140110649 | ENDLESS CABLE WINCH WITH SAFETY CABLE - An endless cable winch or hoist which is particularly suited for a service lift comprises a working cable and a safety cable, further comprises a driving cable pulley around at least a part of which the working cable is wrapped, further comprises a drive for driving the driving cable pulley, further comprises a non-driven safety cable pulley, which is rotatably mounted in a housing and around at least a part of which the safety cable is wrapped, and further comprises an arresting device which is coupled via a brake to the cable pulley and which blocks and brakes the safety cable by means of the brake when the safety cable moves with a predetermined speed at least in one direction. | 04-24-2014 |
20140110650 | ENDLESS CABLE WINCH WITH OVERLOAD PROTECTION - An endless cable winch includes a working cable, a housing, in which is mounted a driving cable pulley around at least a part of which the working cable is wrapped, and further includes a drive for driving the driving cable pulley, wherein the housing is mounted so as to be pivotable about a pivot axis, and a sensor is provided for detecting a pivoting movement of the housing for detecting an overload state of the working cable. | 04-24-2014 |
20150014613 | ROPE HOIST WITH AN EMERGENCY BRAKING ARRANGEMENT - A cable hoist having an emergency braking arrangement comprising a dual toothed wheel assembly driven via a cable drum of the hoist. One of two toothed wheels of the toothed wheel assembly is sensed by a sensing lever of an anchor and an opposite end of the anchor interacts with a ratchet wheel of the toothed wheel assembly. As soon as an over speed occurs, the anchor engages in the ratchet wheel and causes a rotary movement of a carrier on which the anchor is mounted. This rotary motion is used to trigger a mechanical braking arrangement coupled to the cable drum. | 01-15-2015 |
20150041740 | Braking Systems for Pneumatic Hoists - Illustrative embodiments of apparatus and methods for braking a hoist system are disclosed. In one illustrative embodiment, a hoist system includes a winch drum and an air motor coupled to the winch drum. The hoist system further includes a brake coupled to the winch drum and operable to stop rotation of the winch drum and an over-speed sensing device configured to sense a speed of the winch drum. The over-speed sensing device includes a pneumatic switch operable to disconnect an air supply from the air motor and engage the brake to stop rotation of the winch drum and a centrifugal clutch coupled to the winch drum and configured to rotate at a rotational speed proportional to the speed of the winch drum. The centrifugal clutch operates the pneumatic switch when the rotational speed of the centrifugal clutch reaches or exceeds a threshold rotational speed. | 02-12-2015 |
20160096709 | PROGRAMMABLE CONTROLS FOR A WINCH - Methods and systems are provided for adjusting operation of a motor of a winch. In one example, a system for a winch includes a controller adapted to adjust operation of a motor of the winch based on one or more of and/or each of a winch load limit, a motor temperature, a distance of a hook coupled to an end of a rope of the winch to a winch fairlead, and an amount of rope wound onto a drum of the winch. | 04-07-2016 |