Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 7367461 | Movable girder mounted jib A portable jib for movably mounting to a crane girder includes a base frame configured for traveling along a girder and a support member coupled to the base frame, wherein the support member extends substantially upward from the base frame. A boom is coupled to a fr... | 05/06/2008 |
| 7086547 | Travelling working machine This invention provides with a travelling working machine comprising an upper rotating body with a rotating frame and winches, a pair of right and left boom support frames formed in the rotating frame, and axial portions of the winches mounted inside rear portions o... | 08/08/2006 |
| 6561367 | Portable hoist and method A portable hoist has a U-shaped base, a tail assembly with at least a tail leg, an adjustable, telescoping mast secured to the base, a transverse lifting beam secured to the top of the mast and having a roller at each end, and a lifting system attached to... | 05/13/2003 |
| 6502292 | Apparatus and method for preparing an excavator stick for transport An apparatus for preparing an excavator stick for transport includes a base supporting two symmetrically spaced platforms for use by a mechanic. The base comprises a saddle at one end for holding the back portion of the excavator stick which has been deta... | 01/07/2003 |
| 6030170 | Hydraulic lift boom attachable to a tractor's draw bar and three point hitch The hydraulic lift boom attachment including a support frame and a telescopic lifting arm wherein the support frame is coupled to a tractor's three point hitch which hydraulically raises or lowers the support frame. The telescopic lifting arm has one end ... | 02/29/2000 |
| 5918861 | Load lifting apparatus A load lifting apparatus for enabling an individual user to lift a heavy weight. The load lifting apparatus includes a tricycle type base which supports a vertical beam. The vertical beam is height adjustable. The vertical beam supports a horizontal boom.... | 07/06/1999 |
| 5797504 | Portable hoisting system A hoisting system for lifting construction items at a construction site that includes a base assembly, a telescoping pole assembly carried on the base assembly, a slidably positionable line guide assembly slidably mounted to the telescoping pole assembly,... | 08/25/1998 |
| 5645395 | Building crane apparatus climbable on building walls A building crane apparatus includes: a gantry crane slidably held on a pair of guiding rails longitudinally juxtapositionally mounted on two side walls of a building, and an elevating device secured on the building side walls for lifting the gantry crane ... | 07/08/1997 |
| 5617963 | Apparatus for mounting an appliance at an opening The present invention provides an apparatus for mounting an appliance at an opening in a wall, particularly for use with openings in the exterior walls of storage tanks and the like. The apparatus allows men and materials to be safely raised and lowered w... | 04/08/1997 |
| 5195726 | Portable luggage carrier A compact, foldable, portable luggage carrier made of lightweight aluminum which when folded is light enough for easy hand carrying and storing. The apparatus is especially helpful for persons without sufficient strength to load luggage e.g., into an auto... | 03/23/1993 |
| 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 |
| 4861219 | Apparatus for lifting and carrying heavy loads An apparatus for lifting and carrying heavy loads includes a generally horizontally extending support beam attached between a pair of generally vertically extending posts. The distance between the ends of the support beam is selectively adjustable. The bo... | 08/29/1989 |
| 4854804 | Lifting and carrying heavy loads An apparatus for lifting and carrying heavy loads includes a generally horizontally extending support beam attached between a pair of generally vertically extending posts. The lower end of each post is attached to one of a pair of generally horizontally e... | 08/08/1989 |
| 4496277 | Lifting device and method A lifting device and method of using the device is disclosed. The device and method may be used to stock a structure such as a high-rise building under construction or an off-shore gas or oil drilling rig. The device in the preferred embodiment contains a... | 01/29/1985 |
| 4096952 | Adjustable jib crane A jib crane having an adjustable height. The crane comprises a sectional mast which can be lengthened or shortened. The mast has a ceiling connecting element which can accommodate sloping ceilings, and a floor mounting element which is quickly and easily ... | 06/27/1978 |
| 3978989 | Extensible and collapsible portable derrick An extensible and collapsible portable derrick in which the various parts are made from a light weight metal and in which the parts can be disassembled and arranged in compact units, light enough in weight and small enough in size to be readily transporta... | 09/07/1976 |
