| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 187224000 | Having control for load support drive-means | 14 |
| 20080202856 | Angle measurement for forklift operation - The device measures distance from the forklift mast to a fixed point on the forklift roof (overhead guard) proper. The device has an electronic signal producing source which signal is reflected from a surface on the mast of the forklift. The reflected signal is accepted by a signal receiver. These reflected signals are electronically analyzed and displayed on an analog display device. The display device indicates if the mast is in an upright position or if the mast is forward or rearward from the center. This device is useful for retrieving high bay pallets with goods. The electronic signal is an ultrasonic signal. The electronic signal producing source and receiver may be housed as a single unit. | 08-28-2008 |
| 20080257651 | LIFT TRUCK WITH PRODUCTIVITY ENHANCING PACKAGE INCLUDING VARIABLE TILT AND VERTICAL MASTING - Methods and apparatus contemplate a variable mast tilting feature that restricts mast tilt speeds and tilt ranges at a time when the forks are relatively high. Conversely, when the forks are low, no restrictions exist other than operating set-points. A High/Low switch on the mast determines when the forks are high or low. A tilt angle sensor (preferably a linear actuator on the tilt cylinder) determines the amount of mast tilt. A vertical masting feature automatically makes a mast substantially perpendicular to the ground. Activation of a vertical function change button, in combination with an activated tilt lever, causes the mast to upright itself (in either the forward or reverse directions of movement). Also, if the mast is relatively high, the speed of mast “uprighting” will be relatively slower than if the mast is relatively low. Hydraulic and electric circuit diagrams, to name a few, are also disclosed. | 10-23-2008 |
| 20080296094 | Forklift Truck for Mounting on the Rear of a Carrying Vehicle with a Fork Side Shifting Attachment - This invention relates to a forklift truck ( | 12-04-2008 |
| 20080302608 | Fork-Lift Truck - A fork-lift truck has a battery-electric drive system, a driver's stand ( | 12-11-2008 |
| 20090200116 | MULTI-FUNCTION JOYSTICK FOR FORKLIFT CONTROL - A multi-function joystick system controls forklift mast, tilt and fork functions. The system includes a single joystick pivotable about two axes and having first, second and third buttons and a trigger. Combinations of pivoting the joystick alone or in combination with pressing buttons and triggers performs eight forklift functions including negative lift/lower, free lift/lower, maximum lift/lower, tilt forward/backward, left fork left/right, right fork left/right, both forks left/right, and fork open/close. | 08-13-2009 |
| 20100006377 | PALLET COUNTER FOR LIFT TRUCK - A method for counting the pallets or loads moved by a lift truck using internal sensors is disclosed. The lift truck includes a weight sensor for weighing a load, a height sensor, for measuring a height of the forks, and a distance sensor for determining whether the vehicle has moved. When the data from each of these sensors exceeds a corresponding minimum value, a vehicle control system increments a pallet counter. A count of the number of pallets moved is therefore maintained without the need for tracking specific pallets of for adding expensive components and devices. | 01-14-2010 |
| 20100089704 | EQUALIZED HYDRAULIC CLAMP FORCE CONTROL - Hydraulic valve circuitry adapted for automatic weight-responsive control of load-clamping members of a load-lifting system having a free lift mast. The load-lifting system generally includes one or more fluid power actuator for applying a gripping force to a load, at least one elongate, longitudinally-extensible fluid power lifting device having a free lift range of motion and at least one main lift range of motion, and manually operated load-clamping and load-lifting selector valves. The hydraulic valve circuitry provides, independently, weight-responsive control of the load-clamping members when lifting a load, full-time automatic weight-responsive force control of the load-clamping members without concurrent manual actuation of load-clamping or load-lifting selector valves, and equalization of sensed load weight so that the sensed load weight is substantially independent of the longitudinally-extensible position of the lifting device. | 04-15-2010 |
| 20110266094 | Lift Truck Safety System - A method of operating a lift truck, the method including the steps of actuating an override to move the lift truck from a safety configuration into a working configuration, positioning a load onto a front end assembly movably attached to the lift truck, disengaging the override, whereby the lift truck may move into the safety configuration once the load is removed from the front end assembly. The lift truck includes a motorized mover, a front end assembly movably coupled to the motorized mover, and a load sensor coupled to the front end assembly. The front end assembly is positionable between a safety configuration and a working configuration. The load sensor detects the presence of the load on the front end assembly. The front end assembly is moved into the safety configuration when the load sensor does not sense the load on the front end assembly. | 11-03-2011 |
| 20140284142 | Tactile Feedback for Joystick Position/Speed Controls - A joystick controller is disclosed for controlling speed of a boom lift platform, the controller having motors or the like that provide tactile feedback that is intuitively interpreted and adjusted by the user of the joystick speed control, the joystick being neutrally-biased to effect a null velocity when the joystick is positioned in a neutral position, but the tactile feedback forcing the joystick away from neutral to a degree that represents the platform's actual speed. | 09-25-2014 |
| 20140299417 | LIFTING APPARATUS - A lifting apparatus with a first and a second drive wheel aligned about an axis of rotation. The lifting apparatus structure has a longitudinal dimension defined perpendicular to the axis or rotation and adapted to rotatably support the first and second drive wheels. The lifting apparatus has at least one motive device adapted to drive, either together or independently, the first and second drive wheels. The lifting apparatus structure further supports a lifting mechanism with a lifting surface longitudinally offset from the first and second drive wheels. | 10-09-2014 |
| 20140326541 | MATERIALS HANDLING VEHICLE ESTIMATING A SPEED OF A MOVABLE ASSEMBLY FROM A LIFT MOTOR SPEED - A materials handling vehicle is provided including: a support structure including a fixed member; a movable assembly coupled to the support structure; a hydraulic system; and a control system. The support structure further includes lift apparatus to effect movement of the movable assembly relative to the support structure fixed member. The lift apparatus includes at least one ram/cylinder assembly. The hydraulic system includes a motor, a pump coupled to the motor to supply a pressurized fluid to the at least one ram/cylinder assembly, and at least one electronically controlled valve associated with the at least one ram/cylinder assembly. The control structure may estimate a speed of the movable assembly from a speed of the motor and calculate an updated pump volumetric efficiency using the estimated movable assembly speed and a determined movable assembly speed. | 11-06-2014 |
| 20150298950 | BATTERY POWERED FORKLIFT - A battery powered forklift including a fork mounted on a front of a body to which a front wheel and a rear wheel are attached, a counter weight provided on a rear of the body, and a driving electric motor that allows the body to travel, the forklift includes: a battery mounted on the body above the rear wheel; a cargo-handling electric motor configured to generate oil pressure on operating oil that operates the fork; a control device configured to control the cargo-handling electric motor and the driving electric motor; a storage space provided in the body, below a bottom of the battery, and above a bottom of the body for storing the cargo-handling electric motor and the control device; and a fan that exhausts air in the storage space to an outside. | 10-22-2015 |
| 20150298952 | BATTERY POWERED FORKLIFT - A forklift including a fork on a front of a body to which front and rear wheels are attached, a counter weight on a rear of the body, and a driving electric motor allowing the body to travel, the forklift includes: a battery on the body above the rear wheel; a cargo-handling electric motor generating oil pressure on operating oil operating the fork; a controller controlling the cargo-handling electric motor and the driving electric motor; and a storage space in the body, below a bottom of the battery, and above a bottom of the body, wherein the controller and a charging device charging the battery are arranged in the storage space on both sides in a widthwise direction of the body, respectively and an operating oil tank and the cargo-handling electric motor are arranged along a longitudinal direction of the body between the controller and the charging device. | 10-22-2015 |
| 20150344278 | MATERIALS HANDLING VEHICLE ESTIMATING A SPEED OF A MOVABLE ASSEMBLY FROM A LIFT MOTOR SPEED - A materials handling vehicle is provided comprising: a support structure including a first member; a movable assembly coupled to the support structure; a hydraulic system; and a control system. The support structure further comprises lift apparatus to effect movement of the movable assembly relative to the support structure first member. The lift apparatus includes at least one ram/cylinder assembly. The hydraulic system includes a motor, a pump coupled to the motor to supply a pressurized fluid to the at least one ram/cylinder assembly, and at least one electronically controlled valve associated with the ram/cylinder assembly. The control structure may estimate a speed of the movable assembly from a speed of the motor and may control the operation of the at least one valve using a comparison involving the estimated movable assembly speed and a determined speed, and the comparison may not involve use of an operator commanded speed. | 12-03-2015 |
