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| Number | Title | Issue Date |
| 8113362 | Method for lifting of components of wind energy installations A method for lifting of components of a wind energy installation (10) to an installation height, in which a hoisting means (26) of a first hoisting device (20) is guided starting from a hoisting means drive (24), which is arranged close t... | 02/14/2012 |
| 7225865 | Apparatus for positioning a tong and drilling rig provided with such an apparatus A method and apparatus for positioning a tong comprises a piston and cylinder assembly and a mounting assembly therefor. The mounting assembly is mounted on a support beam in the drilling derrick and the piston and cylinder assembly is pivotally mounted on the mount... | 06/05/2007 |
| 6039193 | Integrated and automated control of a crane's rider block tagline system A method is provided to automatically control a cranes's rider block lifte and taglines. Current position of the crane's rider block is determined in terms of its horizontal and vertical coordinates, as well as in terms of the inhaul angle of the liftlin... | 03/21/2000 |
| 5226249 | Tightline apparatus for draglines A tightline apparatus for draglines which includes a pair of mechanical safety devices, each having an engaging bar pivotally attached to a swivel frame of the dragline above each drag rope at the point where the respective drag rope extends between each ... | 07/13/1993 |
| 5137161 | Boom support assembly A boom support assembly for an earth working machine, which includes a winch, a pair of tension members and a pendant pin link interposed between tension members. The first tension member is a boom support pendant secured to a boom point of a boom and the... | 08/11/1992 |
| 5020962 | Apparatus for dismantling buildings A building is rapidly and inexpensively dismantled by dropping a heavy inverted U-shaped tool on a building or other structure from an elevation thereabove as from the upper outer end of a boom on a crane, the tool is initially suspended from a cable lead... | 06/04/1991 |
| 4917567 | Log yarder A log yarder including a support vehicle; a horizontally rotatable framework mounted on the vehicle; one or more booms mounted on the framework; an elongated heeling rack mounted on the most terminal boom; a slack kicker for skidding logs to the yarder; a... | 04/17/1990 |
| 4645082 | Means for suspending a skid pan from a winch mounted on a tractor The present invention relates to system for suspending a skid pan from a winch mounted on a tractor. The skid pan 2 is pivotably suspended from the winch frame 1 by a bolt 3. Stoppers 5 are fastened to the winch frame 1 in order to prevent the skid pan fr... | 02/24/1987 |
| 4515282 | Rotatable crane apparatus for a rescue vehicle A rescue vehicle has a crane boom, hoist winch and rescue winch mounted on a crane turret that is rotatable about a vertical axis. A cable from the respective winches are extended along the crane boom to an associated block that is mounted near the outer ... | 05/07/1985 |
| 4370713 | Anti-tightline control system and method for dragline type equipment An anti-tightline control system and method which monitors the hoist and drag rope-in length of dragline type equipment, and in the event that certain preset levels are exceeded, the control system functions to slow the hoist and drag rope drives, initiat... | 01/25/1983 |
| 4266680 | Floating crane with load reslinging device A floating crane whose floating base mounts a load boom with a load-handling device and a suspended-load reslinging device, the latter comprising a catch so mounted on the floating base as to project over the board thereof while in the load reslinging pos... | 05/12/1981 |
| 4239439 | Log skidder In accordance with illustrative embodiments of the present invention, a new and improved log skidder comprises a motorized vehicle, log carrier means pivotally attached at a point directly above the rear wheels thereof, first means such as a winch for pul... | 12/16/1980 |
| 4174579 | Twin boom dragline A dragline has two booms at a ninety degree angle with the dragrope between them. Each boom has a variable speed hoist mechanism and both hoist ropes are connected to the bucket. Either boom can be used as a digging boom, with the other serving as a dumpi... | 11/20/1979 |
| 4171053 | Antipendulation crane Antipendulation cranes and apparatus for overcoming the undesirable effects of cargo pendulation are set forth along with variations of such cranes for transferring cargo under more desirable conditions. The cranes include the normal booms and associated ... | 10/16/1979 |
| 4153165 | Scraper This disclosure relates to an automatically controlled scraper for moving particulate material onto a radial or star feeder for distribution thereby. The scraper includes a scraper bucket suspended from a radially extending arm. The bucket is connected to... | 05/08/1979 |
| 4124124 | Hydraulic control and drive system for amphibious vehicle having a topside dragline draw works thereon The present disclosure is directed to a hydraulic system for an endless track pontoon type amphibious vehicle having a dragline draw works mounted on the vehicle and both topside and undercarriage mechanism are operated hydraulically, the undercarriage wo... | 11/07/1978 |
| 4102528 | Combined log skidder and loader A wheel tractor that includes facilities for skidding logs and a loading assembly by which the logs may be loaded onto a truck. The wheel tractor includes an upright log skidding arch at a rearward end thereof. Winchlines are played out over rollers provi... | 07/25/1978 |
| 4099631 | Scraper This disclosure relates to an automatically controlled scraper for moving particulate material onto a radial or star feeder for distribution thereby. The scraper includes a scraper bucket suspended from a radially extending arm. The bucket is connected to... | 07/11/1978 |
| 4038765 | Boom support structure for walking dragline excavator An improved boom support for a walking dragline excavator having a roller circle, a frame mounted on the roller circle for swing movement about the axis of the roller circle, a boom having a pair of boom feet connected to a front end of the frame and prox... | 08/02/1977 |
| 3978990 | Mobile log skidder The carriage of the skidder is equipped with an elongated boom and a haulback cable, and there are power driven means on the boom for paying out the attachment end of the cable to the site of the logs, and power driven means on the carriage for hauling in... | 09/07/1976 |
