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| Number | Title | Issue Date |
| 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 |
| 7311297 | Electric powered lift with load control A lifting device utilizing a utility winch having an electric motor and cable drum. The cable on the cable drum extends around a pulley located on a load cell beam. Excessive loads will deflect the load cell beam causing a contact on a micro switch to be engaged to ... | 12/25/2007 |
| 7284743 | Hoist limiting system A hoist limiting system (15) comprising a frame (16), a hoist drum (17) supported by the frame and rotatable about a hoist axis (x-x), a hoist driver (19) supported by the frame and configured to rotate the hoist drum in opposite upward (... | 10/23/2007 |
| 7267241 | Device for determining a load on a hoist The invention relates to a device for determining a load on a hoist of a crane for handling a container, including rope drum, drive motor as well as hoist transmission disposed between drive motor and rope drum and having a hoist transmission case which is swingably... | 09/11/2007 |
| 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 |
| 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 |
| 6871840 | System and method for motion compensation utilizing an underwater sensor A system and method of use for determining a desired physical parameter relating to a load deployed by a movable vessel, in a predetermined plane, using a sensor disposed proximate the load underwater where the sensor produces a transmittable signal indicative of th... | 03/29/2005 |
| 6547220 | Open loop control with velocity threshold for pneumatic hoist A control system for a pneumatic hoist limits the velocity or acceleration of a load attached to the hoist. The control system includes a controller and a valve. The controller provides a variable gain between an actuator, which controls the speed of the ... | 04/15/2003 |
| 6135421 | Hoist with proximity limit switches A hoist apparatus comprising a frame, a hoist drum mounted on the frame for rotation about a drum axis, a motor connected to the drum for selectively rotating the drum in opposite wind-up and wind-off directions about the drum axis, a hoist rope wound aro... | 10/24/2000 |
| 5492306 | Air balance hoist with load position indicator An air balancing hoist having one or more activators providing a signal when a load reaches one or more predetermined heights. The activators each comprise spring loaded plungers mounted to be shifted from an axial location by movement of the drum spool t... | 02/20/1996 |
| 5106593 | Apparatus for producing Czochralski-grown single crystals An apparatus for producing a single crystal grown by Czochralski method includes a winding drum disposed in a case for winding up and down a flexible pull wire, a power transmission mechanism for driving the winding drum, and a bearing unit for rotatably ... | 04/21/1992 |
| 4878607 | Apparatus for unreeling a cable The present disclosure describes an apparatus for unreeling a cable. The apparatus comprises a drawing mechanism for unreeling the cable. This drawing mechanism includes a motor provided with a shaft, a disk having its center rigidly locked to the shaft, ... | 11/07/1989 |
| 4611542 | Personalized towing device The invention provides a portable towing device for downhill or water skiers which includes a drive unit. This drive unit comprises a motor and a drive pulley connected to the motor by a rotor which is rotated by the motor. The motor has an actuator which... | 09/16/1986 |
| 4504023 | Apparatus producing constant cable tension for intermittent demand The disclosed apparatus produces constant tension in superconducting electrical cable, or some other strand, under conditions of intermittent demand, as the cable is unreeled from a reel or reeled thereon. The apparatus comprises a pivotally supported swi... | 03/12/1985 |
| 4462570 | Hoist overload limiter Limiting of hoist overload is accomplished by applying the brake of a pneumatically powered hoist. The brake release signal is interrupted by means of directly sensing the load being lifted by means of this invention, causing the brake to be applied and t... | 07/31/1984 |
