Patents by Inventor Donald R. Landoll
Donald R. Landoll has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6394734Abstract: The trailer has a deck assembly that includes a level main deck portion and a tail hinged to the main deck for vertical swinging movement between a level transport position, a downwardly and rearwardly inclined ground-loading position, and an upwardly and rearwardly inclined dock-loading position. Raising and lowering of the tail between such positions is carried out by fore-and-aft movement of the shiftable undercarriage of the trailer, such undercarriage being located under the tail and generally behind the hinge when the trailer is in its roading position with the tail in its transport position. When the undercarriage is shifted forwardly beyond a lost motion segment of travel, the tail is allowed to progressively descend by gravity to its ground-loading position. Returning the undercarriage to its roading position beneath the tail causes the tail to be raised back to its transport position.Type: GrantFiled: February 10, 2000Date of Patent: May 28, 2002Inventors: Donald R. Landoll, Loren F. Wassenberg
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Patent number: 6378887Abstract: A detachable gooseneck trailer (20) having a gooseneck (24) and a detachable trailer deck (22) utilizes a trailer attachment assembly (30) to draw the trailer deck (22) toward the gooseneck (24) during attachment. The attachment assembly (30) includes a pivoting carrier (66) having a retainer leg (84) with a rearward facing load carrier engagement surface (90). A slide member (68) is attached to the trailer deck (22) and provides a forward facing slide member engagement surface (94). As actuators (70) pivot the carrier (66) rearward, the load carrier engagement surface (90) slides over the slide member engagement surface (94). A latching mechanism (34) utilizes an elongated latch plate (122) pivotally mounted on the retainer leg (84) to automatically latch the carrier (66) to the trailer deck (22). A latch biasing spring (124) biases the latch plate (122) toward its latched position, so that it automatically engages a catch (126) mounted on the trailer deck.Type: GrantFiled: December 1, 2000Date of Patent: April 30, 2002Assignee: Landoll CorporationInventors: Donald R. Landoll, Loren Wassenberg, Kyle Swart, Paul Roesner, Keith Vacha
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Publication number: 20010033783Abstract: A trailer winch assembly (100) is provided for loading containers (52, 53, 94, 96) onto a trailer (50). The winch assembly (100) comprises two movable winch apparatuses (102, 104) mounted on a winch transport assembly (106). A wheel assembly (200) having a rigid wheel frame (202), a wheel (206) rotatably and slidable supported in the wheel frame (202), and an attachment assembly (204) utilizes a jack (298) to raise the container onto the wheel. An off-load foot (350) including a downwardly extending leg (354) having abase (396) for engaging a ground surface (85) is utilized to off-load containers. A container lockdown mechanism (500) includes a securement member (504) attached to the trailer (50), an attachment member (502), and an extension member (506) extended between the container and the securement member (504) to hold the container (52) on the trailer (50).Type: ApplicationFiled: May 16, 2001Publication date: October 25, 2001Inventors: Donald R. Landoll, Sterling W. Gunter, Keith Vacha
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Publication number: 20010024027Abstract: A detachable gooseneck trailer (20) having a gooseneck (24) and a detachable trailer deck (22) utilizes a trailer attachment assembly (30) to draw the trailer deck (22) toward the gooseneck (24) during attachment. The attachment assembly (30) includes a pivoting carrier (66) having a retainer leg (84) with a rearward facing load carrier engagement surface (90). A slide member (68) is attached to the trailer deck (22) and provides a forward facing slide member engagement surface (94). As actuators (70) pivot the carrier (66) rearward, the load carrier engagement surface (90) slides over the slide member engagement surface (94). A latching mechanism (34) utilizes an elongated latch plate (122) pivotally mounted on the retainer leg (84) to automatically latch the carrier (66) to the trailer deck (22). A latch biasing spring (124) biases the latch plate (122) toward its latched position, so that it automatically engages a catch (126) mounted on the trailer deck.Type: ApplicationFiled: December 1, 2000Publication date: September 27, 2001Inventors: Donald R. Landoll, Loren Wassenberg, Kyle Swart, Paul Roesner, Keith Vacha
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Publication number: 20010011807Abstract: A detachable gooseneck trailer (20) having a gooseneck (24) and a detachable trailer deck (22) utilizes a trailer attachment assembly (30) to draw the trailer deck (22) toward the gooseneck (24) during attachment. The attachment assembly (30) includes a pivoting carrier (66) having a retainer leg (84) with a rearward facing load carrier engagement surface (90). A slide member (68) is attached to the trailer deck (22) and provides a forward facing slide member engagement surface (94). As actuators (70) pivot the carrier (66) rearward, the load carrier engagement surface (90) slides over the slide member engagement surface (94). A latching mechanism (34) utilizes an elongated latch plate (122) pivotally mounted on the retainer leg (84) to automatically latch the carrier (66) to the trailer deck (22). A latch biasing spring (124) biases the latch plate (122) toward its latched position, so that it automatically engages a catch (126) mounted on the trailer deck.Type: ApplicationFiled: December 1, 2000Publication date: August 9, 2001Inventors: Donald R. Landoll, Loren Wassenberg, Kyle Swart, Paul Roesner, Keith Vacha
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Patent number: 6224082Abstract: A detachable gooseneck trailer (20) having a gooseneck (24) and a detachable trailer deck (22) utilizes a trailer attachment assembly (30) to draw the trailer deck (22) toward the gooseneck (24) during attachment. The attachment assembly (30) includes a pivoting carrier (66) having a retainer leg (84) with a rearward facing load carrier engagement surface (90). A slide member (68) is attached to the trailer deck (22) and provides a forward facing slide member engagement surface (94). As actuators (70) pivot the carrier (66) rearward, the load carrier engagement surface (90) slides over the slide member engagement surface (94). A latching mechanism (34) utilizes an elongated latch plate (122) pivotally mounted on the retainer leg (84) to automatically latch the carrier (66) to the trailerdeck (22). A latch biasing spring (124) biases the latch plate (122) toward its latched position, so that it automatically engages a catch (126) mounted on the trailer deck.Type: GrantFiled: September 20, 1999Date of Patent: May 1, 2001Assignee: Landoll CorporationInventors: Donald R. Landoll, Loren Wassenberg, Kyle Swart, Paul Roesner, Keith Vacha
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Patent number: 6126378Abstract: A self-loading trailer has a flat deck that can be raised and lowered between a horizontal transport position and a downwardly and rearwardly inclined loading position. A pair of winches adjacent the front end of the deck are normally maintained in a stowed position slightly inboard from opposite sides from the deck but can be shifted outwardly into extended positions outboard of the lateral confines of the deck. In such extended positions, the winches may be used to draw a first container up onto the deck as the inclined deck is moved rearwardly under the container, and then a second container behind the first container, without interfering with the first container. When both containers are fully loaded, the winches are retracted back into their stored positions.Type: GrantFiled: May 22, 1998Date of Patent: October 3, 2000Assignee: Landoll CorporationInventors: Donald R. Landoll, Loren F. Wassenberg, David J. Kongs
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Patent number: 5787988Abstract: A folding planter includes a frame formed by first and second frame members supported for relative, longitudinal shifting movement, a primary fluid-actuated piston and cylinder assembly for shifting the first and second frame members between retracted and extended positions, and a pair of planter assemblies each supported on the second frame member for pivotal movement about a vertical pivot axis between an extended planting position and a retracted transport position. Each planter assembly includes a tool bar that extends transverse to the longitudinal axis of the frame in the planting position and parallel to the frame in the transport position, and a plurality of planting units supported on the tool bar. A pair of elongated trusses are connected between the first frame member and the planter assemblies.Type: GrantFiled: May 31, 1996Date of Patent: August 4, 1998Assignee: Landoll CorporationInventors: Robert Dale Harlan, Donald R. Landoll
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Patent number: 5462123Abstract: The working depth of obliquely angled disc gangs on the implement can be readily adjusted from the tractor seat with a single hydraulic cylinder through the use of mechanical linkage that couples the hydraulic cylinder with all of the disc gangs for simultaneous movement. Special pivots that join the gangs to the main frame permit the gangs to be manually angled adjusted without affecting depth, and vice-versa, while quick-release locks securely hold the gangs in their selected angular positions yet permit rapid adjustment.Type: GrantFiled: February 3, 1993Date of Patent: October 31, 1995Assignee: Landoll CorporationInventors: Robert D. Harlan, Donald R. Landoll
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Patent number: 5082064Abstract: A tillage implement which has both deep tillage subsoil shanks at the rear of the machine and relatively shallow running, residue cutting and topsoil mixing discs at the front of the machine provides for expeditious depth adjustment of the discs through spacer blocks that may be inserted between the underside of the frame of the implement and the tops of the gang beams. The blocks are designed to be clamped in position beside pivot bolts and angle retaining bolts of the gangs such that the blocks may be inserted or removed by merely loosening the bolts instead of completely removing the same and without interfering with the ability of the gangs to be angle adjusted fore-and-aft. The configuration of the blocks is such that they may be stacked one upon the other to provide an increased range of depth adjustment without sacrificing rigidity of construction.Type: GrantFiled: January 24, 1990Date of Patent: January 21, 1992Assignee: Landoll CorporationInventors: Donald R. Landoll, Robert D. Harlan, Wayne L. Carroll
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Patent number: 5013056Abstract: A trailer having a tiltable main deck and a shiftable undercarriage includes an undercarriage assembly having a deck support structure mounted thereon for supporting the deck. The deck support structure includes lifting arms for lifting the elongated deck assembly relative to the undercarriage independently of the undercarriage shifting mechanism so that the deck may be lifted relative to the undercarriage without simultaneouly shifting the undercarriage along the deck. The trailer may include a hitch assembly that permits the trailer to be pivotally connected to a towing vehicle to permit the forward deck to be tilted away from the main deck to increase the angle between the main deck and the forward deck when the trailer is in the unloading position. Further, a deck angle adjustment assembly is disclosed for adjusting the relative positions of the decks.Type: GrantFiled: May 19, 1989Date of Patent: May 7, 1991Assignee: Landoll CorporationInventors: Donald R. Landoll, Kelly Williams, Ted Peck
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Patent number: 4746261Abstract: The self-loading tilt bed trailer has an elongated tiltable bed normally disposed in a substantially horizontal road traveling position that may be tilted about a transverse horizontal axis to a downwardly and rearwardly inclined position. The bed is pivotally coupled at its front end to a towing tractor for pivotal movement of the bed about a substantially vertical axis. When the bed is tilted steeply enough to raise the wheels completely off the ground so the weight of the bed is supported only by a ground-engaging pad at the rear of the bed and the tractor at the front, actuation of a hydraulic cylinder associated with the pad causes the rear of the bed to be shifted a short distance to the right or left relative to the stationary pad, pivoting about the upright hitch axis at the tractor.Type: GrantFiled: February 2, 1987Date of Patent: May 24, 1988Assignee: Landoll CorporationInventors: Donald R. Landoll, Alfred R. Belknap, Michael C. Domine, Kyle D. Swart
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Patent number: 4630991Abstract: A structure for buckling the frames of a two-sectioned, centrally articulated truck chassis has a pair of links swingably mounted on the front frame and pivotally connected to a piston and cylinder power assembly carried by the rear frame. Additionally, a control member in overlying, vertical alignment with the piston and cylinder assembly swingably connects the links to the rear frame. As the piston is actuated, the force directly bears on the links, causing the latter to swing and simultaneously move the control member, causing the frames to move upwardly and spread while tilting about their articulation. The entire force presented by the rear mounted cylinder and piston assembly bears directly on the opposite, front frame such that a minimum amount of power is required to effect the tilting. Also, the vertical alignment of the piston and cylinder with the control member reduces bending and bowing stresses in the structure.Type: GrantFiled: January 7, 1985Date of Patent: December 23, 1986Assignee: Landoll CorporationInventors: Donald R. Landoll, Kyle D. Swart, Joseph B. Morris
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Patent number: 4556357Abstract: 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: GrantFiled: April 16, 1984Date of Patent: December 3, 1985Assignee: Landoll CorporationInventors: Donald R. Landoll, David J. Kongs, Alfred R. Belknap
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Patent number: 4492507Abstract: A control assembly for shifting the undercarriage of a trailer to a position permitting tilting of the bed for facilitating loading of cargo has a relatively long stroke such as to appreciably decrease the slope of the bed when in its tilted position with the undercarriage disposed forwardly remote from its normal roading position. The assembly permits the loading of cargo which would otherwise require additional ramps needed also in certain instances to compensate for overhang.Type: GrantFiled: March 10, 1983Date of Patent: January 8, 1985Assignee: Landoll CorporationInventors: Donald R. Landoll, David J. Kongs, Alfred R. Belknap
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Patent number: 4361191Abstract: Through adaptation of and improvement upon secondary, minimum tillage techniques, there is provided a single pass, seedbed method and agricultural machine, utilizing reduction, incorporation, aeration and other procedures, capable of effectively handling all types of adverse field conditions, ground compositions and soil makeup in such manner as to quickly, easily and inexpensively convert all materials and substances therein contained or to be added thereto from a state generally unsuited for seeding and satisfactory plant development to a finished condition wherein any desired seed type may be thereupon planted, sowed or set thereinto without difficulty and with an assurance of good germination and strong, healthy crop growth unimpaired by wind and soil erosion, ineffective moisture retention and other impediments which otherwise normally reduce or destroy profitable harvesting results.Type: GrantFiled: February 27, 1981Date of Patent: November 30, 1982Assignee: Landoll CorporationInventors: Donald R. Landoll, David J. Kongs
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Patent number: 4231710Abstract: A tiltable trailer is provided with longitudinal beams spaced such as to be located directly beneath the wheels of equipment to be hauled thereby, eliminating the need for heavy cross pieces beneath the deck for the supporting wide loads, thereby contributing toward decreased trailer weight. A lower deck height is accomplished by having the tracks for the rollers of the reciprocable undercarriage and the ramps of such tracks located within the beams, by positioning the undercarriage between the beams and by providing the undercarriage with a low-profile beam support which, in turn, has roller-mounting cross members immediately ahead of and immediately behind the wheel and axle assemblies.Type: GrantFiled: March 22, 1979Date of Patent: November 4, 1980Assignee: Landoll CorporationInventor: Donald R. Landoll
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Patent number: 4125198Abstract: A trailer having a tiltable bed and a wheel-supported undercarriage is provided with structure mounting the undercarriage for reciprocal movement fore and aft of the bed between a forward, bed-tilting position and a rearmost, roading position wherein the bed is carried lower to the ground to accommodate higher loads. The mounting structure includes a pair of tracks on the bed and a series of ramps for raising the bed relative to the undercarriage when the latter is shifted from its roading position such that sufficient spacing between the bed and the undercarriage is provided for clearance of the bed understructure during movement of the undercarriage along its fore and aft path of travel.Type: GrantFiled: May 10, 1977Date of Patent: November 14, 1978Assignee: Landoll CorporationInventor: Donald R. Landoll