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 |
| 7255330 | Field adjustable bridge crane block A field adjustable block for use with a bridge crane having a rotating cylindrical drum for rope. The block includes a cylindrical center pin having a key way recess parallel to an axis of the center pin. An inner side plate has an opening therethrough and an extend... | 08/14/2007 |
| 7189048 | Pick-up vehicle having a swivel device and swivel device for loading and unloading the pick-up vehicle The present invention is directed to a pick-up vehicle, a swivel device for use in a pick-up vehicle for loading and unloading. The pick-up vehicle includes a swivel device including at least one swivel arm having a curved and/or bent section along its length. A swi... | 03/13/2007 |
| 6957847 | Truck with picker crane and sleeper unit for extended duty A commercial truck has a cab, a flatbed, and provides a space between the cab and flatbed, wherein an auxiliary fuel tank is mounted on a frame of the truck. A sleeper unit is positioned on, and supported by, the auxiliary fuel tank, the sleeper unit adapted for bei... | 10/25/2005 |
| 6921241 | Multi-purpose log handling tool A multi-purpose log-handling tool for attachment to the three-point hitch of a tractor or other vehicle includes a boom and an inverted U-shaped frame containing a number of apertures to which accessory tools may be attached. The boom and the frame are connected to ... | 07/26/2005 |
| 6688837 | Pick-up vehicle having a swivel device and swivel device for loading and unloading the pick-up vehicle The present invention is directed to a pick-up vehicle, a swivel device for use in a pick-up vehicle for loading and unloading. The pick-up vehicle includes a swivel device including at least one swivel arm having a curved and/or bent section along its le... | 02/10/2004 |
| 6460307 | Boom attachment for a prime mover A boom attachment for a prime mover for lifting and setting trusses, walls, beams, and related structural components. The boom attachment for a prime mover includes a boom assembly including a prime-mover attachment assembly being adapted to mount to a pr... | 10/08/2002 |
| 6435806 | Pick-up vehicle having a swivel device, swivel device, and process for loading and unloading the pick-up vehicle Pick-up vehicle having an open cargo bed coupled to a passenger cab, side walls, a rear wall, and wheel wells located one of inside and outside of the cargo bed. The pick-up vehicle includes a swivel device adapted for loading and unloading the open cargo... | 08/20/2002 |
| 6272413 | Safety system for boom-equipped vehicle While a crawler body 110 is traveling, infrared sensors 144 and an elevational difference calculator 132 incorporated in a controller 130 detects the magnitude of a step present ahead of the crawler body 110. A safety speed calculator 134 calculates a saf... | 08/07/2001 |
| 6250485 | Boom articulation assembly for aerial boom sections A mobile aerial apparatus includes a lower boom and an upper boom and pivotally mounted to a pedestal. A lift cylinder pivots the lower boom. An articulated assembly includes a common pivot support secured to the articulated ends of the booms on a common ... | 06/26/2001 |
| 6042328 | Lifting device A lifting device for attachment to a vehicle trailer hitch or the like. The device includes a hitch bar for attachment to the trailer hitch. A lateral extension arm is mounted on the hitch bar and a riser arm is rotatably mounted to the lateral extension ... | 03/28/2000 |
| 5810548 | Device for handling of object The invention relates to an arrangement for handling objects, such as a hospital bed, whereby the object is moved by the arrangement from a use or starting position to an uplifted working position which facilitates cleaning, servicing and the like of the ... | 09/22/1998 |
| 5649635 | Easily removable sheave assembly A crane boom top is disclosed in which a sheave assembly having a number of sheave sets is supported on the crane boom top by boom sheave supports. Each sheave set is mounted on an individual shaft and connectors connect the individual shafts to the boom ... | 07/22/1997 |
| 5402898 | Crane having boom rest A truck mounted crane assembly includes a turntable lock, a boom rest which interacts with the piston and cylinder device, and a swing away hoist mount. The turntable lock includes a pin which is manually retractable upon rotation of a handle from a posit... | 04/04/1995 |
| 5135119 | Rescue frame A rescue frame to pivot about footings supported adjacent to an upper edge of a vertical incline. The rescue frame comprises a primary tubular member passing through the footings and having attached thereto a number of secondary tubular members so as to f... | 08/04/1992 |
| 5029717 | Crane A crane or lifting device includes a base assembly with a telescopic and rotatable column mounting a boom assembly including a telescopic boom arm. A strap is connected at one end thereof to the base assembly, extends through the boom arm, and is connecte... | 07/09/1991 |
| 5004108 | Cranes The upper block assembly of a crane is connected to the crane boom via a special universal joint having a pivot axis and a hollow shaft. The cable by which the lower block assembly is suspended is fed through the hollow shaft and extends to the crane winc... | 04/02/1991 |
| 4917566 | Crane attachment for backhoe The invention enables owners of backhoes and similar equipment to use their machines either as a backhoe or as a crane with only minor modifications. The invention provides an attachment for a backhoe that takes advantage of existing hydraulic pistons on ... | 04/17/1990 |
| 4863044 | Latticework construction for cranes A crane, and a boom assembly for a crane, include an outermost boom portion having the area between its front chord members being substantially open. Inner lacing members extend in intersecting pairs between diagonally opposing pairs of chord members for ... | 09/05/1989 |
| 4782962 | Back packable portable unit A portable, backpackable crane lift involving a retractable boom, boom cable, winch and winch cable mounted to a wheeled frame with extendable axles all which fold into a compact unit. A shoulder harness apparatus which attaches to the folded unit for car... | 11/08/1988 |
| 4730742 | Apparatus for lifting an elongate member An apparatus for supportably elevating and lowering material handling apparatus having an elongate member includes two arms radiating upwardly from a base. A lower undercarriage arm is pivotably attached to the elongate member, and the lift arm is attache... | 03/15/1988 |
| 4529064 | Gravity crane A gravity crane which is manually operated by an operator who is harnessed to one end of a cantilevered balance beam. Clockwise moments are furnished by a fixed counterweight and by a adjustable ballast for coarse balancing. Counterclockwise moment is pro... | 07/16/1985 |
| 4529094 | Articulation for tower crane boom that has a parking position The inner end of a tower crane boom is connected to the top of its tower by two lugs fixed on the tower, each having an upwardly opening slot, and two trunnions fixed on the inner end portion of the boom, one for each lug, each rotatably seatable in the r... | 07/16/1985 |
| 4467928 | Pendant supported boom with fixed and live pendant portions A pendant supported extensible boom is disclosed having the boom and a live mast pivoted to a base about an axis near the lowermost surface of the boom for providing a stowed mast-boom angle of about 10°, and a fixed length pendant is provided to maintai... | 08/28/1984 |
| 4327784 | Apparatus for refueling an aircraft from a ship at sea An apparatus is disclosed for refueling an aircraft primarily fron a ship at sea, the ship being subject to changes in vertical and horizontal position due to pitch, roll, and heave, and combinations thereof. The apparatus comprises a first beam having a ... | 05/04/1982 |
| 4310098 | Portable boom structure An improved boom structure is provided which is attachable to a vehicle and includes a boom support member for pivotally supporting a telescopic boom. The telescopic boom includes a generally square outer boom and a generally circular inner boom housed wi... | 01/12/1982 |
| 4280628 | Anti-two block system A new and improved anti-two block system adapted to be used with a crane for the prevention of damage to the boom tip of the boom of the crane by the travelling member wherein the two block system of the present invention includes an engaging mechanism mo... | 07/28/1981 |
| 4278392 | Log skidder with folding arch A log skidder including a vehicle having a frame with front and rear ends, ground engaging devices on the frame so that the vehicle may traverse the underlying terrain, an elongated boom on the frame and mounted thereto for pivotal movement about a genera... | 07/14/1981 |
| 4241838 | Height-adjustable hoist A height-adjustable hoist having an upright post, a tip member extensible therefrom, and a sleeve swivelable about the axis of the post. A hoist arm is pivotally mounted at one of its ends on the sleeve for pivoting in a substantially upright plane betwee... | 12/30/1980 |
| 4109681 | Hoisting crane for building purposes A hoisting crane is of the type comprising a tower and at the top region thereof one inner and one outer jib section which are pivotably mounted. The jib sections have roughly the same length and are by a means slewed relative to the tower, whereby the ou... | 08/29/1978 |
