Jack-knife Linkage Actuated By Hydraulic Means Patents (Class 298/22J)
  • Patent number: 5829842
    Abstract: A truck for separately storing and discharging recyclable materials includes a chassis, a cab, and a frame pivotably mounted on the chassis rearwardly of the cab and supporting a housing with a platform extending along one side to the cab. Partition walls in the housing divide the interior space into a multiplicity of compartments along the length of the housing and a side wall has openings providing access to the several compartments. The partition walls have gates which are held in closed position by locks which are remotely releasable. An upper compartment is provided on the housing and a chute extends upwardly from an opening in the side wall, and a deflectable closure for the opening permits insertion of recyclable materials thereinto. A diagonally extending door is provided on the rear end of the cab adjacent the platform and is slidable between a closed position closing the cab and an open position extending along the adjacent side wall to permit passage between the cab and the platform.
    Type: Grant
    Filed: August 14, 1996
    Date of Patent: November 3, 1998
    Inventor: Santo J. Lombardo
  • Patent number: 5513901
    Abstract: A hoist mechanism including a hoist subframe, a body subframe, a dump linkage pivotally coupling the body subframe to the hoist subframe such that the body subframe pivots about an instant center which moves continuously as the body subframe pivots and an actuator for moving the body subframe between a lowered position and a raised position. The instant center is positioned at a point below the hoist subframe with the body subframe in the lowered position, and progresses to a point above the hoist subframe as the body subframe is lifted to the raised position.
    Type: Grant
    Filed: March 14, 1994
    Date of Patent: May 7, 1996
    Assignee: Heil Company
    Inventors: Fred P. Smith, William R. Johnson, Fred T. Smith
  • Patent number: 5088795
    Abstract: A dumping trailer and truck for containers has a frame for mounting and keeping firmly a container thereon and an oil pressure cylinder possible to raise the frame inclinedly with its front up so shock-enduring goods such as scrap, grain, etc., can be loaded in a container inclinedly raised up through an opening at the front or unloaded from a container inclinedly raised up through an opening at the rear.
    Type: Grant
    Filed: May 8, 1990
    Date of Patent: February 18, 1992
    Inventors: Junny Chen, Charles Chen
  • Patent number: 5074622
    Abstract: A scissor frame lift for pivotally moving a dump body hingedly secured to a truck frame comprising upper and lower frame assemblies having the rearward ends thereof pivotally secured together and which are pivotally moved relative to one another by a hydraulic cylinder operatively interconnecting the upper and lower frame assemblies. The lower frame assembly includes a pair of elongated frame members, the forward ends of which are operatively pivotally or rotatably secured to mounts secured to the frame members of the truck frame. The upper frame assembly includes a pair of frame members, the forward ends of which are operatively connected to mounts secured to the runsills of the truck body. The distance between the rearward ends of the frame members of the lower frame assembly is substantially less than the distance between the frame members of the truck frame and is substantially less than the distance between the forward ends of the frame members of the lower frame assembly.
    Type: Grant
    Filed: January 30, 1990
    Date of Patent: December 24, 1991
    Assignee: Omaha Standard, Inc.
    Inventor: Glenn L. Channell
  • Patent number: 5048896
    Abstract: An improved scissors-type hoist for dump truck bodies comprises an upper frame and a lower frame pivotally connected at a scissors axis. One end of the upper frame opposite the scissors axis is pivotally attached to the dump body, and one end of the lower frame opposite the scissors axis is pivotally attached to the truck chassis. A force multiplying power hinge assembly comprises an elongated guide link pivotally attached at one end to the lower frame and a lift link pivotally attached at one end to the upper frame, the other ends of the guide link and lift link being pivotally connected together. A hydraulic cylinder is pivotally connected at one end of the lower frame and at the other end to the pivotally connected guide and lift links.
    Type: Grant
    Filed: April 20, 1988
    Date of Patent: September 17, 1991
    Inventor: Glenn L. Channell
  • Patent number: 4741576
    Abstract: A hoist mechanism is provided that includes a first and a second lifting arm connected at a first pivot point, a hydraulic cylinder connected to said lifting arms, and a stop located on one end of the second lifting arm. During the initial lifting of the hoist mechanism the first arm remains stationary as the second lifting arm rotates around the first pivot point. The hoist mechanism functions in this manner until the two lifting arms reach a predetermined angle with each other. When the lifting arms reach this angle, the stop acts to convert the action of the hoist mechanism into that resembling a scissors hoist, with both lifting arms rotating, as the hoist mechanism is further extended. The hoist mechanism is designed such that the effective length of the second lifting arm is constantly increasing as the second lifting arm rotates from the rest position to the predetermined angle.
    Type: Grant
    Filed: June 13, 1985
    Date of Patent: May 3, 1988
    Inventor: Eldon D. Jones
  • Patent number: 4592593
    Abstract: A scissor frame lift apparatus is employed in combination with a dump truck and the like, the hoist including upper and lower pivotally interconnected leg members which in turn are pivotally connected at opposite ends to the underside of the dump body and the chassis of the truck, respectively, and lift cylinders extend along opposite sides of the leg members between the dump body and chassis to elevate and tilt the dump body. The upper limit of advancement of the dump body is controlled by a frame stop member which defines an angular extension of one of the leg members and moves into engagement with the other of the leg members before the cylinders reach their full limit of extension and thereby absorb the force of the dump body when it is lifted to the full limit of its extension about the hinge.
    Type: Grant
    Filed: May 4, 1984
    Date of Patent: June 3, 1986
    Inventor: Glenn L. Channell
  • Patent number: 4556357
    Abstract: A truck in the nature of an automotive vehicle for carrying and moving heavy loads, bulky articles, freight, etc., has a wheeled front section which includes a cab and an engine compartment and a wheeled rear section which includes a cargo-receiving bed. The two sections are articulated to permit raising of the truck at the articulation or joint between the sections, causing the front section to slope downwardly and forwardly from the joint and the rear section to slope downwardly and rearwardly from the joint, resulting in the bed being positioned in a small angle of inclination relative to the plane of the surface which supports the truck such as to facilitate loading and unloading. The bed is reciprocable fore and aft of the rear section by use of hydraulic power means for placing its rear ramp against such surface, and a linkage system, also hydraulically powered, effects the tilting operation.
    Type: Grant
    Filed: April 16, 1984
    Date of Patent: December 3, 1985
    Assignee: Landoll Corporation
    Inventors: Donald R. Landoll, David J. Kongs, Alfred R. Belknap
  • Patent number: 4480871
    Abstract: A pair of elongated arm assemblies are provided each having first and second ends. The first ends of the arm assemblies are pivotally connected for relative swinging of the arm assemblies in a plane paralleling both arms and the second end of one arm assembly is pivotally anchored between the longitudinal frame rails of the main frame of a vehicle while the second end of the other arm assembly is pivotally anchored between the longitudinal stringer rails of a dumping load bed of the pivoted type supported from the vehicle main frame. The second ends of the arm assemblies include transverse tubular members in whose opposite ends pivot shaft members are rotatably and slidably received and the opposing sides of the main frame rails and load bed stiffener rails include opposing socket members supported therefrom in which the outwardly projecting ends of the corresponding pivot shaft members are slidably and rotatably received.
    Type: Grant
    Filed: March 9, 1983
    Date of Patent: November 6, 1984
    Inventor: Eldred A. Fox
  • Patent number: 4415300
    Abstract: A transporter-unloader for large cylindrical hay bales features a main frame and a load frame, the load frame partially overlying the main frame and pivoted to the rear end of the latter frame. The rear end of each frame is equipped with a pair of wheels, and a scissors type hoist between the two frames raises the load frame relative to the main frame and at the same time elevates the rear end of the main frame relative to the ground.
    Type: Grant
    Filed: September 22, 1981
    Date of Patent: November 15, 1983
    Inventor: Mark J. Boddicker
  • Patent number: 4348054
    Abstract: An adjustable, tilting vehicle bed which is power actuated and is capable of having its position selectively altered between positions in which it is flat, raised, tilted for dumping a load and tilted to provide a loading ramp.
    Type: Grant
    Filed: July 7, 1980
    Date of Patent: September 7, 1982
    Inventors: Gary L. Shonkwiler, Forest M. Shonkwiler
  • Patent number: 4302050
    Abstract: A hoist mechanism that more effectively uses its hydraulic capacity is comprised of a first and a second pair of lifting arms connected at a first pivot point, a hydraulic cylinder connected to said lifting arms, and a pivoting stop means that coordinates movement of the two pair of lift arms. During the initial lifting action of the hoist, the mechanism achieves the advantages of a double arm type hoist by causing the first pair of lifting arms to remain stationary while the second pair of lifting arms rotates around the first pivot point. After the second pair of lift arms reach a predetermined angle with the stationary first pair, the stop means are engaged in a way to cause both pair of lift arms to move upon further lifting action of the hoist, thus achieving the advantages of a scissors type hoist from this point on.
    Type: Grant
    Filed: October 17, 1979
    Date of Patent: November 24, 1981
    Inventor: Eldon D. Jones
  • Patent number: 4253536
    Abstract: An articulated, cross-country motor vehicle, especially for forestry work and the transportation of timber, comprising front and back pairs of bogies with belts, pivotally attached to the frame of the vehicle by means of transverse axles or shaft journals. The bogies are independently and/or mutually pivotable and adjustable relative to one another in the vertical plane by means of hydraulic pivoting members controlled from the driver's seat of the vehicle. The vehicle consists of a forward, endless tread vehicle and a trailer provided with a hitch. The two components are releasably coupled together and arranged so as to be mutually universally pivotable relative to one another.
    Type: Grant
    Filed: February 23, 1979
    Date of Patent: March 3, 1981
    Inventor: Thor F. Braathen
  • Patent number: 4176881
    Abstract: A self acting lock which automatically locks down the dump body of a truck and automatically releases when the body is to be raised. Two pairs of lever arms which are pivoted together cooperate with a single acting hydraulic cylinder to provide a hoist for raising and lowering the dump body. The upper arms are pivoted to the body and the lower arms are pivoted to a pair of links which are in turn pivotally mounted to the truck frame. Each link carries a hook which engages with a keeper rod carried on the upper pair of arms to lock down the body. A leg extending from the upper arms pivots the links in a direction to engage the hooks with the keeper rod in response to lowering of the dump body to the load carrying position. The linkage is arranged such that initial extension of the cylinder pivots the links in a direction to release the hooks from the rod before continued extension of the cylinder raises the dump body in the usual manner.
    Type: Grant
    Filed: April 27, 1978
    Date of Patent: December 4, 1979
    Inventor: H. Ray Cole
  • Patent number: 4168861
    Abstract: A dump-hoist conversion system particularly suited for providing a dump capability in pick-up trucks. A modified scissors hoist is utilized having transversely spaced lower channel members as well as lift members. These components mutually nest when the bed of the truck is down and are located on either side of the differential gear housing in such down position. A dump pivot hinge is provided having a hinge axis lower than the upper surface of the side rails of the undercarriage frame. This provides a safety aspect against rear-end collisions. Hydraulic drive is provided through the utilization of a 12 volt d.c. motor which operates from the battery circuit of the vehicle.
    Type: Grant
    Filed: February 6, 1978
    Date of Patent: September 25, 1979
    Inventor: Ollie J. Carroll
  • Patent number: 4161338
    Abstract: A scissor hoist attachment for pickup truck beds to convert a fixed bed truck with a passenger cab and hauling bed supported on a frame to a tilting bed truck. The hoist upon installation allows the truck bed to be rotated from a horizontal to a tilt position so that the truck cab and bed are in the same relative relationship in the horizontal position as before the installation of the hoist, i.e. the hoist does not alter the original body lines of the truck. The hoist is a four bar linkage. The yoke utilizes one cylinder to operate a scissors of wide pivotal area but narrow at its mountings. The wide pivotal area permits use of the space around the truck differential since the scissors side plates and spreader plate straddle the truck differential and permit a heavier payload to be lifted. The wide pivotal area enables the hoist to be used with essentially all standard pickup trucks and makes the hoist effectively universal.
    Type: Grant
    Filed: November 3, 1977
    Date of Patent: July 17, 1979
    Assignee: The Uni Corporation
    Inventor: Henry C. Brown
  • Patent number: 4148528
    Abstract: A scissor frame for a truck hoist for stabilizing a dump body mounted upon a truck when it is lifted and tilted. The frame includes an upper leg and a lower leg hinged together by an offset pivot to permit the legs to fold against each other. The lower leg is connected to a saddle pivot mounted upon the truck frame. The upper leg is connected to a support pivot mounted upon the longitudinal base beams of the dump body, and when the dump body is retracted with the base beams lying upon the truck frame, the support pivot nests against the saddle pivot and the folded legs lie upon cross members of the truck frame in the space between the longitudinal base beams of the dump body.To resist torsional and lateral strains, each leg is a torsionally-rigid, rectangular tube. The combined cross sectional height of the tubes, as when folded together, cannot exceed the distance between the truck frame cross members, whereon the lower leg will lie, and the cross sills of the dump body which are carried by the base beams.
    Type: Grant
    Filed: January 16, 1978
    Date of Patent: April 10, 1979
    Inventor: Glenn L. Channell
  • Patent number: 4066296
    Abstract: A truck bed tilting mechanism is provided for use between the hauling bed and frame of a truck having a bed pivotally connected adjacent the rear of the truck frame to permit relative rotation between the hauling bed and the frame. The tilting mechanism includes a first arm pivotally connected at one of its ends to the truck frame and extending forwardly from the frame. A second arm is pivotally connected at one of its ends to the truck bed adjacent the forward end of the bed and extending rearwardly from the truck bed. A third arm is pivotally connected between the end of the first arm remote from the frame and a point intermediate of the ends of the second arm. A fourth arm is pivotally connected between the end of the second arm remote from the hauling bed and a point intermediate of the end of the first arm. A variable length actuator arm is interconnected between the first and second arms at points intermediate of the ends of the first and second arms.
    Type: Grant
    Filed: December 28, 1976
    Date of Patent: January 3, 1978
    Inventors: Louis M. Ray, Jr., Leo L. Pease, Henry C. Brown
  • Patent number: 4052105
    Abstract: A truck hoist assembly for use in combination with a dump vehicle having a chassis and a dump bed pivotally mounted to the rear of the chassis. A pair of relatively small sized hydraulic cylinders are pivotally connected adjacent the rear pivot of the dump bed, the distal ends of which are pivotally connected to an end of an elongated main lever. The other end of the main lever is pivotally connected to an elongated linkage assembly whose distal ends are, in turn, pivoted to the underside of the dump bed at a distance somewhat forwardly of a rear axle of the truck. The main lever is pivotally connected to the chassis at a fulcrum point which is substantially horizontally aligned with the dump bed pivot points when the bed is in its horizontal or down position. The assembly provides improved lifting leverage through the complete cycle of the hoist, especially near the top of the stoke, which in turn enables smaller and more economical hydraulic cylinders to be utilized.
    Type: Grant
    Filed: April 9, 1976
    Date of Patent: October 4, 1977
    Inventor: Walter Moe
  • Patent number: 4019781
    Abstract: The specification discloses an attachment for converting a fixed bed truck with a passenger cab and hauling bed supported on a frame to a tilting bed truck. The attachment permits the rotation of the truck bed from a horizontal to a tilt position, such that the truck cab and bed, when the bed is in the horizontal position, assumes the same relative relationship as before the conversion. The attachment includes at least two hinges fixedly attached between the underside of the hauling bed and the rear of the truck frame to permit relative rotation between the hauling bed and frame. A first arm is pivotally connected at one of its ends to the forward portion of the frame and extends forwardly from the frame. A second arm is pivotally connected at one of its ends to the underside of the truck bed adjacent the forward end thereof and extends forwardly from the truck bed. A coupling member is pivotally connected at its opposite ends between the other ends of the first and second arms.
    Type: Grant
    Filed: November 10, 1975
    Date of Patent: April 26, 1977
    Inventor: Louis M. Ray
  • Patent number: 3985250
    Abstract: A self-loading vehicle having an elongated horizontal frame to one end of which is connected a vehicle-propelling structure while at the other end region of the frame there is a bell crank structure pivoted to the frame for turning about a bell crank axis which extends horizontally and transversely with respect to the direction of vehicle travel. The bell crank has, when the vehicle is in a load-transporting mode, an upright arm extending upwardly from the bell crank axis and a substantially horizontal arm extending from the bell crank axis toward the vehicle-propelling structure. This latter upright arm is pivotally connected distant from the bell crank axis to a load-carrying structure so that the latter can turn with respect to the upright arm about a discharge axis which is parallel to the bell crank axis.
    Type: Grant
    Filed: June 19, 1975
    Date of Patent: October 12, 1976
    Inventor: Sakari Matti Mononen
  • Patent number: RE34733
    Abstract: A scissor frame lift for pivotally moving a dump body hingedly secured to a truck frame comprising upper and lower frame assemblies having the rearward ends thereof pivotally secured together and which are pivotally moved relative to one another by a hydraulic cylinder operatively interconnecting the upper and lower frame assemblies. The lower frame assembly includes a pair of elongated frame members, the forward ends of which are operatively pivotally or rotatably secured to mounts secured to the frame members of the truck frame. The upper frame assembly includes a pair of frame members, the forward ends of which are operatively connected to mounts secured to the runsills of the truck body. The distance between the rearward ends of the frame members of the lower frame assembly is substantially less than the distance between the frame members of the truck frame and is substantially less than the distance between the forward ends of the frame members of the lower frame assembly.
    Type: Grant
    Filed: August 5, 1992
    Date of Patent: September 20, 1994
    Assignee: Omaha Standard
    Inventor: Glenn L. Channell