Class / Patent application number | Description | Number of patent applications / Date published |
254375000 | Including means for preventing or retarding rotation of drum in at least one direction | 13 |
20090294746 | Electrohydraulic Leak Compensation - The invention relates to an electro-hydraulic leak compensating device for a mobile crane lowering brake system in an open hydraulic circuit with a hydraulic motor ( | 12-03-2009 |
20090309084 | Lineset Winch with Braking Parts - A winch which can operate with an external brake, or the external brake can be removed to operate with an internal brake. The winch has a cable drum that rotates to get cable on and off the drum. Two eccentric cams are rotated to always keep a soft plastic part pressed against the drum. | 12-17-2009 |
20100001243 | HANDLE-OPERATED BRAKE/RELEASE MECHANISM FOR A CABLE DRUM WINCH - A handle operated brake and release mechanism for a cable drum winch provides a winch that can be used in the assembly of inland river barges to form multi-barge tows. The handle of the brake and release mechanism can in one function and entirely by hand (without using any other tools) release the cable tension and apply the brake at the same time. The entire brake and release mechanism is mounted on the outside of a winch frame having winch side plates, thereby allowing the mechanism parts to be replaceable in the field without taking the winch side plates apart. | 01-07-2010 |
20100163815 | TAPERED BRAKING DEVICE FOR ELECTRIC WINCHES - The present invention discloses a tapered braking device for electric winches which disposes a section of gear shaft, a section of core shaft, a wedge shape support, braking plates, an elastic element, a wedge shape piece A, a wedge shape piece B, a braking clutch base and so on in a gear box of an electric winch. When a motor works, the section of core shaft of the motor can drive the braking clutch base and the wedge shape pieces A, B to rotate, until a gap is formed between the friction faces of the wedge shape support and the wedge shape piece B and the braking plates so that the braking action stops. When the motor suddenly stops, a heavy load lifted by a tight wire rope reel provides a reverse pulling force so that the wedge shape piece B produces a reverse thrust force to push the friction faces of the braking plates, so the braking effect is achieved quickly. Based on the braking plates with the double tapered faces, the present invention can increase the braking area and the braking force and achieve safe braking. Furthermore, worn parts concentrate in the braking plates, so it only needs to replace the braking plates made of friction materials, which can simplify maintenance, reduce the costs and ensure service life of the gear box. | 07-01-2010 |
20130214225 | Safety Brake Device for Theatre Hoist - A safety brake device for a theatre hoist to prevent the uncontrolled release of a load that is suspended above or below people includes an overrunning clutch and a torque disc. The torque disc only rotates with the overrunning clutch when the load is lowered, but must overcome friction forces applied to the surface of the torque disc to do so. The friction forces are constantly applied to the torque disc by maintaining friction material in contact with the torque disc. The friction material is a non-asbestos, non-metallic composite saturated with a lubricant. | 08-22-2013 |
20140203227 | ELEVATOR MOTOR - An elevator motor includes a rotor with a rotor body carrying a traction sheave as well as a brake surface configured to be gripped by a motor brake. The brake surface of the rotor is provided on a separate brake element which is separated from the rotor body, and the brake element is connected to the rotor body only via spaced apart connections. This solution leads to a reduced noise propagation of the elevator rotor. | 07-24-2014 |
20150060747 | SOUNDLESS WINCH - A soundless includes a body, which is a hollow cylinder that has an end forming a flange, is provided, at each of ends thereof, with a stepped section, and receives a bearing, a one-way bearing, and a friction ring therein; a reel, which has two ends each forming a stop flange, a threaded rod projecting from a center of one of the ends of the reel and having an end forming a fitting hole, the reel being received, with the threaded rod thereof, in the hollow cylinder of the body in such a way that the threaded rod of the reel is exposed outside the body to allow the bearing, the one-way bearing, and the friction ring to couple to the reel; and a handle, which is fit to the threaded rod of the reel that is exposed outside the body by a pin fit in the fitting hole. | 03-05-2015 |
20160159376 | MOVABLE CABLE LOOP DESCENT SYSTEM - A movable cable loop descent system comprises a cable for forming into a loop, a receiver for attachment to a structure having a receiver pulley for engaging the cable loop, a brake assembly, having a drive pulley for being rotated by the cable loop, the brake assembly for slowing a rate of travel of the cable loop and a carriage supporting a load for attachment to the cable loop at a point and for movement between the structure and the ground. A rotor and substantially parallel conductive frame is mounted on an axle through the drive pulley. Magnets on a surface of the rotor and/or the frame induce eddy currents, as they are relatively rotated, which create a rotational braking force controlling descent of the carriage and load. The brake assembly may be removably positioned by a drive-on anchor. The cable is removable and the system may form a kit. | 06-09-2016 |
254376000 | Ratchet wheel or formation and locking pawl | 3 |
20120298938 | WINCH ASSEMBLY - A winch assembly is described and shown herein. The winch assembly may include a first housing member having a first retaining member formed therein and a second housing member having a second retaining member formed therein, the second housing member secured to the first housing member forming a winch housing. The winch assembly may further include a drive system generally positioned within the winch housing, and a winch drum operatively coupled with the drive system and rotationally secured with the first and second retaining members. | 11-29-2012 |
20130277630 | HEAVY DUTY RATCHET - A ratchet includes a spool rotatably disposed within a housing and supporting a cord having opposed cord sections extending from the housing. Tension to one cord section is initially applied by pulling on the other cord section. To increase the tension, a tool is engaged with the spool to apply a further force to increase the tension on the one cord section. In another embodiment, a cord enters the housing and into the center of a hollow shaft supporting a spool and drawn through the hollow shaft to establish an initial degree of tension on the section of the cord entering the housing. A lever cooperating with the spool turns the spool to wrap the cord about the spool and increase the tension on the cord. In a third embodiment, a cord enters a housing and extends about a spool supported within the housing and thereafter exits the housing. A pivotable lever incrementally rotates the spool to increase the tension on the cord entering the housing. To further increase the tension on the spool, a wrench or the like may engage the shaft supporting the spool in any of the ratchets described. | 10-24-2013 |
20140175353 | Compact Hoist System - A hoist system having a drum primarily self-contained within a batten, for raising and lowering lighting, sound equipment, curtains and the like in a performance environment. The hoist system may be adapted with safety mechanisms including an overload sensor and/or a slack line detector. The system may be provided in the form of a point hoist. The compact system is highly scalable to a variety of spaces and applications, including school and public theaters and concert halls, as well as some homes, private business, etc. Additional features include various cable management systems and trim adjustment mechanisms for use with the hoist system. | 06-26-2014 |
254378000 | Frictional brake assembly having rotating, wheel structure and shiftable shoe or band | 2 |
20100163816 | ELEVATOR BRAKE WITH COMPOSITE BRAKE HUB - An elevator brake ( | 07-01-2010 |
20140124720 | HOIST EQUIPPED WITH POWER-OFF TYPE ELECTROMAGNETIC BRAKE - Disclosed is a hoist equipped with a power-off type electromagnetic brake, wherein, at positions corresponding to an upper portion and a lower portion of a brake disk of an electromagnetic brake cover surrounding the electromagnetic brake, there are respectively provided insertion openings for first and second operation levers to be vertically inserted between an armature and a pressure-receiving plate. The first operation lever has an insertion portion to be fitted from above into the insertion opening to be inserted between the armature and the pressure-receiving plate, a retaining portion horizontally bent from the insertion portion, and a connection portion downwardly bent from the retaining portion to be connected with the second operation lever, and the second operation lever has an insertion portion fitted from below into the lower insertion opening to be inserted between the armature and the pressure-receiving plate, and an operation portion horizontally bent from the insertion portion. | 05-08-2014 |