| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 187226000 | Having extensible vertical guide for load support | 20 |
| 20080217109 | BEARING ASSEMBLY FOR LIFT CHAIN ROLLERS IN A MULTIPLE LIFT MAST FOR HIGH-LIFT FORK TRUCKS - A bearing assembly for lift chain rollers in a multiple lift mast for high-lift fork trucks which has a fixed mast, a middle mast, and an inner telescoping mast each of which has two parallel-distanced mast profiles, wherein the mast profiles of the middle mast, at the upper end, mount a lift chain roller each for at least one lift chain each to lift the inner mast, wherein the lift chain roller is disposed in front of the inner mast crosswise to the web of the middle mast profile, wherein a separate bearing component for the lift chain roller is placed onto the mast profile or onto a cross-beam joining the mast profiles from top, and is welded thereto. | 09-11-2008 |
| 20090032338 | THREE STAGE MAST - The present invention is directed to an apparatus and method for raising and lowering a three-stage forklift mast assembly having a reduced overall lowered height. A first linkage system on the outer and middle masts creates a 2:1 movement ratio of the middle mast with respect to movement of a piston arm in the first linkage system. A second linkage system on the middle and inner masts creates a 2:1 movement ratio of the inner mast with respect to the movement of the middle mast and an overall 4:1 movement ratio with respect to the movement of the piston arm in the first linkage system. A third linkage system on the inner mast creates a 2:1 movement ratio of a set of forks on the inner mast with respect to the movement of a piston arm in the third linkage system, allowing free lift of the forks. | 02-05-2009 |
| 20090107774 | MAGNETO-RHEOLOGICAL INERTIAL DAMPING SYSTEM FOR LIFT TRUCKS - A lift truck includes a magneto-rheological damper coupled between the base frame and a frame holding a vertically sprung suspended wheel. The damper is electrically connected to a vehicle control system, which increases and decreases the damping force as a function of at least one of a weight of a load on the forks of the lift truck, a height of the mast of the lift truck, and a speed of the lift truck. As the weight of the load, height of the mast and speed of the vehicle increase, the damping force is increased. As the weight of the load, height of the mast, and speed of the vehicle decrease, the damping force is decreased. When the damper is activated to increase the damping force, the truck can maintain a four point stance, providing a larger footprint for the center of gravity, thereby limiting truck sway or oscillation. When the damper is not active, or the damping force is increased, as, for example, during unloaded operation, the suspension of the truck is relatively soft, providing a smoother ride, thereby increasing operator comfort and productivity. | 04-30-2009 |
| 20090260923 | PALLET TRUCK WITH CALCULATED FORK CARRIAGE HEIGHT - A pallet truck including a controller that calculates the height of the fork carriage without the use of mechanical devices such as switches or sensors. A calculated carriage height is derived by adding the amount of time that a carriage is commanded to be raised and offsetting that by the amount of time that the carriage lower button is depressed. The calculated carriage height is essentially an accumulated lift time where the time that the carriage is lifting is a positive value and the time that the carriage is lowering is a negative value. When these values are combined, the result is the present calculated carriage height. The controller further monitors the calculated carriage height such that if the carriage is too close to the ground, the maximum speed of the pallet truck is limited to prevent damage to the forks or ground due to striking or scraping between them. | 10-22-2009 |
| 20100065377 | MONOMAST FOR A MATERIALS HANDLING VEHICLE - A materials handling vehicle is provided comprising a vehicle power unit having a longitudinal centerline, a monomast coupled to the vehicle power unit and having a centerline offset from and generally parallel with the longitudinal centerline of the vehicle power unit, and a fork carriage apparatus movably coupled to the monomast. | 03-18-2010 |
| 20120145485 | Energy Storage on an Elevated Platform and Transfer Method - A lift truck includes a secondary rechargeable energy storage device on a vertically movable platform that is separate from a primary rechargeable energy storage device on the lift truck's main tractor unit. Wires or hoses for transfer of power or controls between the main tractor unit and the platform are reduced or eliminated. The quantity of energy stored in the secondary rechargeable energy storage device is sufficient to power platform electrical loads for a predetermined amount of time until the platform is lowered. When the platform is lowered, the secondary rechargeable energy storage device is recharged by the primary energy storage device. | 06-14-2012 |
| 20120228064 | CAM DRIVEN WEDGE BRAKING SYSTEM FOR MULTI-STAGE LIFTS - Apparatus for braking relative vertical movement between two vertical members includes linkage connected either directly or indirectly to a cable pulley-mount that is spring loaded and moves cams that wedge in between two vertically moveable members when cable tension is not present at the pulley. A broken cable, for example, will create a situation where there is no cable tension between a plurality of cable pulleys, the lack of cable tension moves the mechanical cam style linkage to engage the braking members. | 09-13-2012 |
| 20140216853 | VIBRATION CONTROL SYSTEMS AND METHODS FOR INDUSTRIAL LIFT TRUCKS - A lift truck includes systems and methods for improved vibration control. A corrective yaw input mechanism reduces or eliminates torsional vibration motion of the lift truck about the Z-axis. Some embodiments may include, alone or in combination, drive wheel control and load wheel control. | 08-07-2014 |
| 20140231176 | Electric Lifter - The invention provides an electric lifter, comprising a fixed mast structure, a movable mast structure that is movable relative to the fixed mast structure at feast one transmission means (chain or cog drive belt or rack or similar), and a load carrier, in particular a fork load carrier, being connected to the at least one transmission means and configured to carry a load, wherein the at least one transmission means is movably connected to the movable mast structure while being configured to move along a dosed loop path, the closed loop path being stationary relative to the movable mast structure. | 08-21-2014 |
| 20150122585 | LIFT CHAIN TENSION RELIEVING DEVICES AND METHODS - Devices and methods to relieve lift chains from being maintained under constant, or nearly constant, tension are provided. | 05-07-2015 |
| 187227000 | Guide or drive-means therefor positioned to enhance operator visibility | 2 |
| 20080196976 | MAST CONSTRUCTION FOR A LIFT TRUCK - A mast includes a base section, an outer telescopic section and an inner telescopic section which are raised and lowered by a pair of main lift cylinders. A fork carriage is slidably mounted to the inner telescopic section and is raised and lowered thereon by a pair of free lift cylinders. The mast elements are arranged to form two mast columns which produce minimum obstruction to the truck operator's field of view when looking forward through the mast. | 08-21-2008 |
| 20110048860 | Lift Truck With Mast - A lift truck includes an operator compartment having a center operating position providing an operator with a first field of view and an off center operator position providing the operator with a second field of view. A pair of forks extend away from the operator compartment. Each of the forks include a distal end. A pair of base legs extend away from the operator compartment and space laterally outwardly from the pair of forks away from a central axis of the truck. Each of the base legs include a distal end. A pair of mast columns is interposed between the operator compartment and the forks. A portion of the first field of view is blocked by the mast columns and a portion of the second field of view is blocked by the mast columns. The distal ends of the forks and the distal ends of the base legs are visible in the first field of view and the second field of view. | 03-03-2011 |
| 187228000 | And guiding means for fluid drive line | 2 |
| 20150353332 | LIFT FRAME FOR AN INDUSTRIAL TRUCK - A lift frame has a lift mast along which a lift carriage is arranged so as to be movable in elevation. At least one hydraulic line progresses along the lift mast and a tensioning device is provided for the hydraulic line. The tensioning device has a bracket mounted permanently on the lift frame and a deflection section for the hydraulic line. The deflection section can be selectively mounted at different elevations on the bracket to adjust the tension in the hydraulic line. An industrial truck incorporating the lift mast is also disclosed. | 12-10-2015 |
| 20150360921 | Lift Truck With Mast - A lift truck includes an operator compartment and a pair of forks extending away from said operator compartment in a forward direction. A pair of mast columns are interposed between the operator compartment and the forks. Components mounted on at least one of the mast columns are arranged to fall within a viewing shadow so as not to obstruct the operator's field of view. | 12-17-2015 |
| 187229000 | Extended by single fluid ram | 3 |
| 20140262626 | Buckling-Resistant Lift Cylinders - A lift cylinder for a mast assembly of a vehicle and a vehicle implementing the same. The lift cylinder includes a cylinder housing with a piston received therein. The piston is movable along an axis of extension between an extended position and a retracted position. The piston is formed of a composite material having a reinforcement phase oriented along the axis of extension of the piston, thereby increasing the buckling resistance of the piston. This improved buckling resistance potential allows for increased lift cylinder extension and/or more compact lift cylinder design. | 09-18-2014 |
| 20150360922 | LIFT CYLINDER COMPRISING A DEFLECTION ROLLER DEVICE FOR AN INDUSTRIAL TRUCK - The invention relates to a lift cylinder ( | 12-17-2015 |
| 20160039649 | SYSTEM AND METHOD FOR IMPROVING LIFT CYLINDER BUCKLING RESISTANCE - A lift truck can include a mast and a lift cylinder. The lift cylinder can include a piston rod and a cylinder housing. The lift truck also can include a piston rod retention mechanism that restricts movement of the lift cylinder in a direction lateral to an axial direction when the mast is in an extended position. | 02-11-2016 |
| 187230000 | Specific vertical guide | 3 |
| 20100181147 | UPRIGHT FOR A LIFT TRUCK - An upright for a lift truck includes a first group of mast sections in a first stagger arrangement where a first mast section of the first group of mast sections is fixed to the lift truck. The upright further includes a second group of mast sections in a second stagger arrangement that is reverse nested inside the first stagger arrangement. Further, the upright includes a drive system for telescopingly extending and retracting the second mast sections relative to the first mast section. | 07-22-2010 |
| 20130146396 | MAST ASSEMBLY FOR FORKLIFT TRUCK - A mast assembly for a forklift truck includes a plurality of guide units. At least one of the guide units includes a sliding pad member made of a plastic material and having a block-shaped body, which is hollow, is open at its base side, and has a rectangular ring-shaped cross section. The sliding pad member has a rectangular, plain, front wall provided at the side of the block-shaped body opposite to the base side thereof. The front wall has a sliding contact surface. Reinforcement ribs are formed on the inner surface of the front wall. Grooves are formed in the sliding contact surface, extending along the respective ones of the reinforcement ribs and helping avoid formation of shrinkage depressions in the sliding contact surface. The block-shaped body includes first and second pairs of opposing side walls. Tabs are formed on the first pair of opposing side walls. | 06-13-2013 |
| 20150075913 | UPRIGHT FOR A LIFT TRUCK - An upright for a lift truck includes a first group of mast sections in a first stagger arrangement where a first mast section of the first group of mast sections is fixed to the lift truck. The upright further includes a second group of mast sections in a second stagger arrangement that is reverse nested inside the first stagger arrangement. Further, the upright includes a drive system for telescopingly extending and retracting the second mast sections relative to the first mast section. | 03-19-2015 |
