Clamshell Bucket Patents (Class 37/461)
  • Patent number: 9890519
    Abstract: A fluid-powered tool actuator usable with a vehicle having an arm and a rotation link for rotation of the tool actuator in a first plane and being laterally tiltable in a second transverse plane. In some embodiments pressurized fluid is communicated using distribution channels and passageways internal to the actuator to limit use of external hydraulic lines. In some embodiments the tool actuator has certain components in a compressive pre-loaded state to reduce their fatigue failure during operation of the tool actuator under load.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: February 13, 2018
    Assignee: Helac Corporation
    Inventor: Dean R. Weyer
  • Publication number: 20140259814
    Abstract: Disclosed is a particulate-handling bucket assembly that provides a sound seal between an extended lip section and an extended cavity section located on opposing scoops of the bucket assembly. The seal is formed by abutting elastomeric material located within a cavity of the extended cavity section against an abutting end of the extended lip section. The elastomeric material has an exposed edge which butts against the abutting end of the extended lip section, with the exposed edge having an exposed height that is greater than or equal to an abutting height of the abutting end of the extended lip section.
    Type: Application
    Filed: March 14, 2014
    Publication date: September 18, 2014
    Inventors: John H. GAUTHIER, Laura G. MARTIN, Jon A. CRAFT
  • Patent number: 7685749
    Abstract: The invention relates to a soil stripping device, in particular a trench wall grab, comprising a base body, which can be connected to a carrier implement, a work unit, on which soil working tools are arranged and which is supported on the base body in a rotatable manner by means of a bearing device, and a rotary device for rotating the work unit with respect to the base body. The rotary device has at least one linear drive and a rope or chain transmission, through which a linear movement generated by the linear drive can be translated into a rotating movement.
    Type: Grant
    Filed: January 15, 2008
    Date of Patent: March 30, 2010
    Assignee: Bauer Maschinen GmbH
    Inventors: Stefan Franz Loeffelholz, Josef Maierhofer
  • Patent number: 6896306
    Abstract: Actuator mechanism for a two-bucket grab device and having two grab arms arranged to move as pincers with respect to one another, has two hydraulic pivot motors with journals of the respective pivot shafts projecting from the motor housing and supporting the grab arms. Each of the pivot motors has a cylindrical tubular piece provided with an internal thread designed to engage an external thread on the respective pivot shaft. The tubular piece is a ring piston axially-displaceably, but non-rotatably held in a cylinder space formed in one of the respective bucket housings. Pitch of the threads is sufficiently large for the ring piston to transmit required torque to the respective pivot shaft by axial displacement of the ring piston. The displacement path of the ring piston between two annular cylinder chambers corresponding to high and low pressure chambers which can be loaded with hydraulic oil, corresponds to the desired pivot angle of the two arms of the grab bucket.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: May 24, 2005
    Assignee: Kinshofer Greiftechnik GmbH
    Inventor: Manfred Schierholz
  • Patent number: 6823616
    Abstract: A method of excavating a surface layer of soil is disclosed that uses an excavator with a grab having two bucket halves with cutting edge. In a first excavating position, the grab is held in a first orientation as seen in projection on a horizontal plane and inserted into the layer of soil in an open position of the bucket halves until their cutting edges reach a first predetermined level while maintaining the first orientation. While maintaining that level and first orientation, the bucket halves are moved to a closed position during which movement their cutting edges move towards each other through a substantially straight path so as to excavate a first rectangular portion of the layer of soil. The grab is then lifted and moved to a discharge position horizontally spaced from the excavating position and emptied there to make further transport of the excavated soil possible.
    Type: Grant
    Filed: July 8, 2002
    Date of Patent: November 30, 2004
    Assignee: Boskalis Westminister Inc.
    Inventors: Arnold Gutter, Dick Korf
  • Patent number: 6540925
    Abstract: An apparatus for recovering oil has a bucket for skimming and collecting water and oil floating on the surface of the water. The bucket has a base plate having apertures for draining water collected by the bucket. The apertures have a preselected diameter and length to allow separation of the oil and water utilizing differences in specific gravities and viscosities of the oil and water so that the oil can be discharged from the bucket into an oil recovery tank after the water drains out of the bucket through the apertures but before the oil begins to drain out of the apertures.
    Type: Grant
    Filed: April 27, 2001
    Date of Patent: April 1, 2003
    Assignee: Nishimuragumi Co., Ltd.
    Inventors: Shinjiro Takahashi, Katsuyuki Maida, Hiroshi Saeki
  • Publication number: 20030010196
    Abstract: A hydraulic system for a utility vehicle includes provision for controlling two hydraulic implements or tools alternately with a single control lever. The hydraulic system includes a first hydraulic implement and a second hydraulic implement both hydraulically flow-connected to a diverter valve. A source of pressurized hydraulic fluid is connected to a selective control valve, operated by a control lever, and the selective control valve is hydraulically flow-connected to the diverter valve. The diverter valve is selectively operated to connect the control valve to either the first or to the second hydraulic implements. An implement-select actuator is signal-connected to the diverter valve and configured for alternately operating the first and second hydraulic implements.
    Type: Application
    Filed: July 13, 2001
    Publication date: January 16, 2003
    Inventors: Ellis Junior Smith, Christopher Thomas McCord, David Laverne Sprinkle
  • Patent number: 6401368
    Abstract: An excavator and a method of use of the excavator is provided for use in excavating a trench having a pipeline extending along one side thereof in a longitudinal direction of the trench. The excavator is positioned adjacent the pipeline opposite the trench and includes a hydraulic arm arranged to extend over the pipeline and into the trench. A hydraulic clam bucket is mounted on a free end of the hydraulic arm for excavating earth from the trench. The arm includes articulation joints about both horizontal and vertical axes such that the base of the excavator adjacent the pipeline may remain fixed in relation to the pipeline as the bucket is guided within the trench.
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: June 11, 2002
    Inventors: James A. McLeod, Murray Pisony
  • Patent number: 6145517
    Abstract: A method of removing a solidified body of polyethylene from a Unipol reactor using a robotic apparatus extended through a porthole on top of the reactor.
    Type: Grant
    Filed: April 22, 1999
    Date of Patent: November 14, 2000
    Assignee: Keibler-Thompson Corp.
    Inventor: Matthew A. Mancuso
  • Patent number: 6023862
    Abstract: A control system for a rope bucket, the rope bucket being designed for the hoisting and transfer of materials and adapted to be suspended from a hoist trolley transferable along an essentially horizontal travel path. The control system includes a hoist mechanism for hoisting the rope bucket, and a close mechanism for closing and opening the scoops of the rope bucket, and also for hoisting and lowering the rope bucket. The hoist mechanism includes two separate mechanisms, and similarly the close mechanism includes two separate mechanisms which also form the transfer mechanism of the hoist trolley.
    Type: Grant
    Filed: September 23, 1998
    Date of Patent: February 15, 2000
    Assignee: KCI Konecranes International PLC
    Inventor: Juhani Sirjola
  • Patent number: 5715614
    Abstract: A transplant machine including a bucket for digging a plant such as trees and shrubs from the ground, a main frame for pivotably supporting the bucket, an arm for lifting the main frame, a shaft extending from the main frame at right angles and an intermediate frame for connecting the main frame with the lifting arm such that the frame can rotate about the shaft relative to the lifting arm. The frame and the bucket rotate together. As the main frame rotates about the shaft, the bucket rotate with the main frame. Therefore, the transplant machine can change a direction of the a tree after a digging operation. In other words, it is possible to turn the tree while the bucket is holding the tree above the ground. During the turning of the tree, the lifting arm (or a main body of the transplant apparatus) is stopped since the intermediate frame allows the main frame and the bucket to rotate relative to the lifting arm. The bucket may be removable from the lifting arm.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: February 10, 1998
    Assignee: Kabushiki Kaisha Ishikatsu Exterior, Inc.
    Inventors: Masaaki Ookuwa, Takanori Fujiwara
  • Patent number: 5638616
    Abstract: An oil supply mechanism in a deep excavator comprising a chassis, a turntable disposed on the chassis, a boom which is pivotally supported on the turntable and is vertically swingable, a stretchable arm arrangement which is stretchable in the longitudinal direction and comprises base, middle arm and top arms, and buckets which are attached to the top arm for excavating and holding earth or sand. The oil supply mechanism includes an oil supply unit provided in the middle arm, and first and second hollow oil supply pipes are airtightly slidable in the oil supply unit and move outwardly from the oil supply unit in opposite direction. The outer end of the first oil supply pipe is coupled with the base arm, and the outer ends of the second oil supply pipe is coupled with the top arm.
    Type: Grant
    Filed: December 20, 1995
    Date of Patent: June 17, 1997
    Assignee: Nikken Corporation
    Inventor: Mitsuhiro Kishi
  • Patent number: 5473828
    Abstract: To excavate sticky soil such as clayey soil, left and right buckets of a clamshell bucket are slightly inclined, thereby reducing the force to pull the buckets from a hole. The clamshell bucket includes left and right buckets which are closable, thereby holding soil, and a hydraulic cylinder having a stroke reserve so as to be further extendible after the buckets are closed, whereby the closed buckets can be displaced sidewardly relative to the vertical.
    Type: Grant
    Filed: November 28, 1994
    Date of Patent: December 12, 1995
    Assignee: Japanic Corporation
    Inventor: Mitsuhiro Kishi
  • Patent number: 5375348
    Abstract: A stretchable arm of a deep excavator comprises top, middle and base arms wherein a bucket is suspended from the top arm and a working unit is fixed to the middle arm. Two hydraulic cylinders constituting the working unit are arranged in parallel with each other while cylinder rods thereof are oppositely directed, wherein the cylinder rod of one hydraulic cylinder is coupled to the base arm and the cylinder rod of the other hydraulic cylinder is coupled to the top arm. It is possible to extend and contract each arm of the stretchable arm synchronously with one another at higher speed compared with a conventional deep excavator having a single hydraulic cylinder. The oil under pressure which flows out from the discharge chamber of each hydraulic cylinder can be merged into the oil under pressure for extending each hydraulic cylinder so that the amount of oil to be supplied to the pressure chamber is increased.
    Type: Grant
    Filed: March 12, 1993
    Date of Patent: December 27, 1994
    Assignee: Japanic Corporation
    Inventor: Mitsuhiro Kishi