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| Number | Title | Issue Date |
| 7337563 | Work vehicle having improved mounting structure of control valve unit A work vehicle includes a traveling vehicle, a backhoe having a base frame detachably connected to a rear portion of the traveling vehicle and an excavator detachably attached to a rear portion of the base frame. The base frame includes a pair of upper and lower bas... | 03/04/2008 |
| 7293625 | Operating lever device for construction machine and construction machine At the front end of an operating lever constituted as a joystick lever, a grip that is not allowed to rotate relative to the operating lever is attached. At the front end of the grip, a rotary operating member to be used for prime mover rotation speed adjustment is ... | 11/13/2007 |
| 7222444 | Coordinated linkage system for a work vehicle A work vehicle with a tool pivotally attached to a linkage, an actuator for controllably moving the tool about its pivot, and a tilt angle sensor for sensing the absolute angle of the work tool relative to the earth. A controller is adapted to perform an auto-hold f... | 05/29/2007 |
| 7090475 | Hydraulic control circuit for a hydraulic engine with at least two speeds A hydraulic control circuit for a radial piston engine with two speeds. The changeover between the speeds takes place through the alteration of the absorption volume, the delivery side being connected to the discharge side with a bypass connection by a valve arrange... | 08/15/2006 |
| 7037236 | Hydraulic transmission vehicle A hydraulic transmission (21) has an electric actuator (86) for changing its output/input rotation speed ratio. A controller 90 of the actuator memorizes a command current value to the actuator supposing that load is not applied on the hydraulic... | 05/02/2006 |
| 7032332 | Method of controlling a backhoe An electronic control for damping oscillation of a swinging backhoe assembly includes a crossover valve that connects the hydraulic lines that supply hydraulic fluid to the boom swing cylinders to each other whenever an electronic controller senses incipient oscilla... | 04/25/2006 |
| 6520731 | Closed circuit swing control system A control system for swing cylinders to position a boom on a backhoe or the like includes a pair of double acting hydraulic cylinders on the backhoe frame operatively connected to the boom for swinging the boom with respect to the frame, a closed circuit ... | 02/18/2003 |
| 6422804 | Inertia load dampening hydraulic system A hydraulic system is provided with a pump supplying pressurized hydraulic fluid through a first supply line to a closed center control valve. From the control valve the fluid is directed through work lines to a hydraulic motor. Exhausted hydraulic fluid ... | 07/23/2002 |
| 6146082 | Hydraulic swivel connector, excavating machine and method of use The invention provides a hydraulic swivel connector, excavating machine having hydraulic swivel connectors and methods of use thereof. The hydraulic swivel connector, comprises, a first and second hydraulic swivel cylinder each having an extendable arm, a... | 11/14/2000 |
| 5995893 | Device for controlling the operation of power excavators A device for controlling the operation of power excavators includes a control lever which is handled simply by one hand, which is different from the prior art systems having multiple control levers necessarily handled by both hands. The control lever cons... | 11/30/1999 |
| 5934147 | Linkage arrangement A linkage arrangement supports an implement such that the implement is movable relative to a support member which is also movable relative to a structure. Movement of the implement and support member is limited by mechanical and/or mechanically operated l... | 08/10/1999 |
| 5661917 | Civil engineering works machine in which the working tool is mounted at the end of an articulated arm Civil engineering apparatus that includes a turret mounted upon the chassis of a motor vehicle. A boom is pivotally mounted in the turret and is connected to a tool stick by a boom tip. Articulating members are mounted on either end of the boom stick so t... | 09/02/1997 |
| 5590699 | Mechanism for rotating a tree-felling implement and tree-felling implement therewith The mechanism is used for rotating a tree-felling implement rotatably connected to a distal end of a boom of a logging vehicle by an implement pivot. The mechanism comprises a first arc-shaped member that extends in a plane perpendicular to the boom plane... | 01/07/1997 |
| 5542477 | Front lifting device for agricultural tractor or the like Lifting device (D) comprising a frame (4) for fixing to a tractor chassis, the frame being fitted, on its lower part, with lower securing member (A), articulated about a transverse axis and extending towards the front, with its ends capable of being coupl... | 08/06/1996 |
| 5446979 | Hydraulic circuit system for civil engineering and construction machines The hydraulic circuit system for civil engineering and construction machines includes a first pressure adjusting device (130) arranged between first variable restrictors (107, 107a) of a left traveling directional control valve (47) and a first traveling ... | 09/05/1995 |
| 5424623 | Coordinated control for a work implement The present invention provides, an apparatus for controllably moving a vehicle's work implement. The work implement includes a first appendage pivotally connected to the vehicle, and a second appendage pivotally connected to the first appendage. The appar... | 06/13/1995 |
| 5413452 | Hydraulic system for a backhoe apparatus A hydraulic system suited for use with a backhoe apparatus and which is configured to automatically direct a priority flow of actuating fluid from an actuating fluid source to hydraulic motors used to swing the backhoe apparatus into a desired swing posit... | 05/09/1995 |
| 5308219 | Process for automatically controlling actuators of excavator An automatic actuating system for actuators of excavator. The system of this invention automatically controls the bucket which is overloaded to be free from the overloaded state thereof, the bucket to maintain an angular position with respect to the absol... | 05/03/1994 |
| 5116183 | Apparatus for unloading freight from an open freight car An unloading apparatus comprises a supporting frame, a railroad disposed on the bottom of the supporting frame for an open freight car with freight, a pair of belting members hung on the upper portion of the supporting frame, and a moving member including... | 05/26/1992 |
| 5037264 | Hydraulically operated load handling vehicle for open-top railway cars A hydraulically operated load handling vehicle for open-top railway cars having four, three-way adjustable outriggers, each having a pair of wheel-like pads which ride along the sidewall tops of open-top railway cars. The corresponding wheel-like pads on ... | 08/06/1991 |
| 5018934 | Backhoe hydraulic cylinder decelerator A backhoe pivotally supported from a prime mover is disclosed wherein the hydraulic boom cylinder operably interconnecting the frame of the prime mover and the boom member for operably moving the boom assembly generally vertically relative to the prime mo... | 05/28/1991 |
| 5016721 | Full-turn type working machine Described is a full-turn type working machine which generally consists of a lower travelling body and an upper rotary body. The upper rotary body includes a machine room, an operator's cabin, a fuel tank and a counterweight which are laid out within a cir... | 05/21/1991 |
| 5002454 | Intuitive joystick control for a work implement The work implements on earthmoving and material handling vehicles are generally controlled with two or more operator control handles or pedals that do not intuitively correspond to the movement of the implement. Generally, the assignment of the implement ... | 03/26/1991 |
| 4943205 | Earth moving machine An earth moving machine comprises an earth moving tool, a plurality of drive elements arranged to move the earth moving tool in different directions, and a control unit operative for actuating the drive elements, the control unit including a single contro... | 07/24/1990 |
| 4907667 | Full-turn type working machine Described is a full-turn working machine which generally consists of a lower travelling body and an upper rotary body. The upper rotary body includes a machine room, an operator's cabin, a fuel tank and a counterweight which are laid out within a circle o... | 03/13/1990 |
| 4904149 | Swing mechanism for an earth-moving apparatus A swing mechanism for an earth-moving apparatus having a main frame and a swing frame which is pivoted at the main frame about a vertical axis. The swing mechanism includes a pair of slide members which are in sliding engagement with a pair of slide surfa... | 02/27/1990 |
| 4859138 | Boom for a vehicle including folding linkage between boom parts A boom H for a vehicle A which carries a working implement K to enable operations to be carried out such as excavation or loading, comprises first (11) and second (10) parts, the first part (11) carrying the working implement (K) and the second part (14) ... | 08/22/1989 |
| 4830562 | Apparatus for loading and unloading railroad gondola cars A method and apparatus for loading and unloading a railroad gondola car having spaced apart, parallel side walls with upper surfaces, the apparatus including a hydraulic excavator for excavating, loading, and unloading materials, the hydraulic excavator h... | 05/16/1989 |
| 4773814 | Earth moving machine The earth moving machine has a body having a ground engaging propulsion device and a base frame mounted on the ground engaging propulsion device. The base frame is movable relative to the ground engaging propulsion device about a first generally vertical ... | 09/27/1988 |
| 4767255 | Backhoe boom cylinder bleed circuit A bleed circuit for a backhoe boom cylinder which minimizes cylinder pressure during over-center movement of the boom while permitting the maintenance of sufficient cylinder pressure during other boom operations. The boom cylinder is provided with a retra... | 08/30/1988 |
| 4741663 | Locking and sliding system A side shift backhoe mounted on a sliding frame adapted for sliding transversely along upper and lower tracks of a main frame and in which the sliding frame and one of the tracks have matching chamfered surfaces and the sliding frame and other track have ... | 05/03/1988 |
| 4728251 | Complete swivel type backhoe vehicle A backhoe vehicle comprising an upper carriage including a driver's section and swivellable 360 degrees on a chassis, and an excavating assembly including a boom, a bucket arm and a bucket. The boom defines a first and a second bent portions so that a dis... | 03/01/1988 |
| 4725187 | Excavator An excavator for use in tunneling operations wherein there is minimal head room, comprising a boom mounted to a mobile carriage for rectilinear movement in a horizontal plane and angular movement in a vertical plane. A rigid arm is pivotally mounted at on... | 02/16/1988 |
| 4718325 | Hydraulic swing control for boom assembly An improved mechanism is provided for controlling the relative pivoting movement of two members about a main pivot axis as effected by two hydraulic motors. Each hydraulic motor is a double-acting piston-cylinder type that is fully extended when its respe... | 01/12/1988 |
| 4693662 | Compact excavator A compact excavator has a superstructure, a swinging or swivelling mechanism connecting said superstructure with a chassis for swinging said superstructure relative to said chassis about a vertical axis, and a boom on said superstructure. The boom is link... | 09/15/1987 |
| 4679336 | Earth moving machine A machine comprises a body (10) having a ground engaging propulsion means (11) and a base frame (14) mounted on the ground engaging means (11), the base frame (14) being movable relative to the ground engaging propulsion means (11) about a first generally... | 07/14/1987 |
| 4666360 | Forklift linkage device An improved forklift linkage device of the type engageable with the forwardly-extending forklift tines. The linkage device includes a horizontal frame having a front tool-supporting portion and a rear securing portion extending rearwardly therefrom at a l... | 05/19/1987 |
| 4571146 | Digging apparatus applicable to a bucket loader A digging apparatus (5) attachable to a bucket loader e.g. a tractor loader (1) of the type used for smaller digging work, such as excavating trenches, e.g. in agriculture, park management or the like, and incorporating a connecting device (4), intended t... | 02/18/1986 |
| 4500250 | Backhoe swing mechanism An improved hydraulic swing mechanism is disclosed for operation of the boom assembly of a backhoe or similar implement. The swing mechanism includes a pair of double-acting hydraulic motors pivotally interconnected between the backhoe frame and the backh... | 02/19/1985 |
| 4419040 | Backhoe swing mechanism An improved hydraulic control system is disclosed for operating the swing tower and boom of a backhoe. The system includes a pair of hydraulic motors interconnected between the backhoe frame and swing tower. A sequencing valve is hydraulically associated ... | 12/06/1983 |
