Draft Gear Patents (Class 267/138)
  • Patent number: 8820493
    Abstract: A shock energy absorber includes, in one example, a cylinder having a closed end and an open end, a sleeve fixed about the open end of the cylinder, and a damping material in the form of an ultra high molecular weight polyethylene material in the cylinder. A plunger is positioned to be driven into the damping material via the sleeve. When the plunger is impacted and driven into the damping material, the damping material changes from a solid to a viscous fluid state thereby enabling absorption of a significant amount of energy.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: September 2, 2014
    Assignee: Foster-Miller, Inc.
    Inventors: Basant K. Parida, Timothy Harrigan, James Carter, Norman Dana, Gopal Samavedam
  • Publication number: 20130026688
    Abstract: The towed roping dummy shock absorption apparatus provides for an apparatus designed to be inserted between a pulling vehicle and a towed roping dummy when practicing team roping from horseback. The apparatus provides for modulation of jerks and forces on the dummy that cause strain on the vehicle, dummy and horse, as well as providing for more consistent speed when being towed.
    Type: Application
    Filed: July 30, 2012
    Publication date: January 31, 2013
    Inventor: JOH NOLAN MCCARTHY
  • Publication number: 20090065317
    Abstract: The present invention relates to an energy-absorbing unit, including a UIC buffer or a side buffer, which provides an additional irreversible shock-absorbing stage for e.g., a UIC buffer which can be retroactively installed, an energy-absorbing unit, is proposed which is mountable to the support frame or undercarriage, of e.g., a railborne vehicle as one complete exchangeable unit. The energy-absorbing unit hereto includes a base plate for preferably detachable connecting of the energy-absorbing unit to the support frame or undercarriage of a car body, a connecting plate, to which e.g., the UIC buffer can be connected, and a destructively-configured energy-absorbing element which is braced between the base plate and the connecting plate without play.
    Type: Application
    Filed: September 11, 2008
    Publication date: March 12, 2009
    Applicant: Voith Patent GmbH
    Inventor: Michael Gansweidt
  • Patent number: 6581953
    Abstract: A trailer hitch uses a draw bar to interconnect tractor and trailer vehicles. The draw bar includes an elongated shank with a transverse throughway. A resilient cushion is disposed in the throughway. A passageway is associated with the throughway to receive a hitch pin such that longitudinal motion of the shank is resiliently resisted by the cushion. The cushion may be disposed in a rigid casing to form a cartridge that inserts into the throughway, and the passageway may be provided by a reciprocating slide member in the casing. Cushions may be employed in the casing to resist motion during both braking and acceleration. Cartridges having differing performance may be interchanged in the system. A method employing such structures is described.
    Type: Grant
    Filed: August 9, 2001
    Date of Patent: June 24, 2003
    Inventor: Smith R. Jerry
  • Patent number: 6474675
    Abstract: A stabilizer for reducing, if not totally eliminating, swaying, fishtailing and/or jackknifing of a multi-trailer rig includes spring units that can be retrofit onto the rig between a towed unit and another unit towing that towed unit. Each of the spring units is operated by a lever-like pivot handle and the spring units are located on opposite sides of a dolly.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: November 5, 2002
    Inventors: Mark Bockman, Tamera Bockman
  • Patent number: 6286853
    Abstract: A vehicle hitch for interconnecting a pair of all terrain vehicles includes a pair of bars with socket couplers at one end of each bar for connecting the bars to the balls of conventional trailer hitches; and a damping mechanism releasably interconnecting the other ends of the bars and limiting longitudinal movement of the bars relative to each other. The bars are releasably locked together by a generally C-shaped pin, the arms of which are inserted through one end of a shaft extending out of one of the bars.
    Type: Grant
    Filed: November 1, 1999
    Date of Patent: September 11, 2001
    Inventor: Jacques Lauzon
  • Patent number: 6260873
    Abstract: An apparatus, interposed between and attached to a drive vehicle and an object to be moved, dampens the force (drive, resistance, inertia, etc.) between them. The apparatus has a rigid structure which is capable of transferring the large forces required to pull the object, from the drive vehicle to the object, but uses damping to moderate the impact of the forces on the drive vehicle/object combination.
    Type: Grant
    Filed: August 29, 2000
    Date of Patent: July 17, 2001
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Steven George Bishel, Shaobo Liu
  • Patent number: 5497858
    Abstract: A dynamic motion limiter for supporting high temperature piping in nuclear power plants, the motion limiter including a cylinder and piston wherein the movement of the piston within the cylinder is limited with intermittent contact between energy absorbing stop positions.
    Type: Grant
    Filed: August 7, 1992
    Date of Patent: March 12, 1996
    Assignee: Robert L. Cloud & Associates, Inc.
    Inventors: Robert L. Cloud, James S. M. Leung, Jason W. Dunham
  • Patent number: 5380030
    Abstract: An energy dampening drawbar for use with receiver hitches and specialty types of hitches is described as including an elongated hollow shank having slots on opposite sides. A first cushion block is located within the shank and has a portion of the first cushion block adjacent one surface of a pin block. The pin block has a hole that aligns with a portion of the two slots. A second cushion block is located within the shank adjacent another surface of the pin block. A first restraint prevents longitudinal travel within the shank by the first cushion block. A second restraint prevents longitudinal travel within the shank by the second cushion block. A plate is attached to one end of the shank to provide a surface for attaching a trailer coupling.
    Type: Grant
    Filed: February 16, 1993
    Date of Patent: January 10, 1995
    Inventor: Russell C. Gullickson
  • Patent number: 4978133
    Abstract: A trailer hitch adapter is provided for connection either to a trailer hitch ball or to a trailer hitch tongue. The adapter includes a tubular member that defines a housing and a connecting member carried within the housing between a pair of resilient elements to absorb axial shocks and rotational loads imparted by one of the towed vehicle or the towing vehicle to the other vehicle. The adapter is removably connected with a portion of the trailer hitch by means of a pair of retaining pins, to permit its removal and transfer from one vehicle to another, and also to prevent an unauthorized connection of a towed vehicle to a trailer.
    Type: Grant
    Filed: October 30, 1989
    Date of Patent: December 18, 1990
    Inventors: Rexford M. Thorne, David G. Edleman
  • Patent number: 4817978
    Abstract: An improved trailer hitch assembly of the draw bar type consisting of a receiver tube mounted on the tow vehicle to receive a draw bar tube in vibration damped retention while extending a hitch ball. The draw bar tube retains a resilient spring block assembly that is secured to the receiver tube by means of a hitch pin and the hitch pin moves within elongated slots on said draw bar tube so that vibration from the draw bar tube is damped by the spring block assembly and isolated from the receiver tube and tow vehicle. A shock absorber is connected between the receiver tube and some point on said draw bar tube.
    Type: Grant
    Filed: May 23, 1988
    Date of Patent: April 4, 1989
    Inventor: Loyal W. James
  • Patent number: 4773668
    Abstract: A towing hitch is disclosed which has a housing for receiving a tow bar such that said housing can be pivotally connected to said tow bar. A tongue is coupled to the housing for receiving a towing element. The housing has a pin which project into said tow bar and said pin has a resilient block mounted thereon such that said block is arranged between said pin and said tow bar to dampen or absorb shock or vibration transmitted to said towing hitch.
    Type: Grant
    Filed: June 16, 1987
    Date of Patent: September 27, 1988
    Inventor: Grant Muonro
  • Patent number: 4746138
    Abstract: An improved trailer hitch assembly of the draw bar type consisting of a receiver tube mounted on the tow vehicle to receive a draw bar tube in vibration damped retention while extending a hitch ball. The draw bar tube retains a resilient spring block assembly that is secured to the receiver tube by means of a hitch pin, and the hitch pin moves within elongated slots on said draw bar tube so that vibration from the draw bar tube is damped by the spring block assembly and isolated from the receiver tube and tow vehicle.
    Type: Grant
    Filed: August 24, 1987
    Date of Patent: May 24, 1988
    Inventor: Loyal W. James
  • Patent number: 4603878
    Abstract: A base portion is provided for support from the forward end of a vehicle to be towed or the rear end of a vehicle to be used to tow a second vehicle. An elongated hitch bar assembly is provided including first and second ends and mounting structure mounts the second hitch bar end, intermediate its opposite ends, from the base portion for guided front to rear lengthwise extension and retraction relative to the base portion between forward and rearward limit positions and for angular displacement of the rear hitch bar end about an upstanding axis, shiftable forward and rearward with the second hitch bar end, relative to the base portion between opposite limit positions of angular displacement. Bias structure yieldingly biases the second hitch bar end toward a central position between the front and rear limit positions and first latch structure is operative to releasably latch the hitch bar rear end relative to the base portion in a center position of angular displacement.
    Type: Grant
    Filed: November 20, 1984
    Date of Patent: August 5, 1986
    Inventor: Hoke Smith, Jr.
  • Patent number: 4564208
    Abstract: A trailer stabilizer for use on a self-contained amusement ride to stabilize and reduce movement between the trailer body and a movable point of attachment referred to as the goose neck which directly engages the fifth wheel of a truck cab.
    Type: Grant
    Filed: March 19, 1984
    Date of Patent: January 14, 1986
    Assignee: Majestic Rides Mfg. Co., Inc.
    Inventor: Paul S. Kudler
  • Patent number: 4515387
    Abstract: A hitch assembly includes an outer housing adapted to be attached to a propelled vehicle, an inner housing enclosed by the outer housing and a tongue member partially enclosed by the inner housing and adapted to be connected to a vehicle to be towed. A selectively releasable latching mechanism mounted on the outer housing retains the inner housing in a first latched position to prevent relative movement between the housings. When the latching mechanism is released, the inner housing is free to be moved to a second position where it is pivotally connected to the outer housing to permit movement of the tongue member through an arc in a horizontal plane to aid in the connection to the vehicle to be towed. The hitch assembly can also be provided with shock absorbing cushions in the inner housing to absorb and dissipate starting and stopping shock loads.
    Type: Grant
    Filed: March 25, 1983
    Date of Patent: May 7, 1985
    Inventor: Howard L. Schuck
  • Patent number: 4351542
    Abstract: A towing hitch having a main frame for attachment to a vehicle, a tongue force transmitting member pivotally coupled to the main frame, and a resilient member supporting said force transmitting member so as to absorb shock forces applied to the last mentioned member.
    Type: Grant
    Filed: July 10, 1980
    Date of Patent: September 28, 1982
    Inventors: Robert Lovell, Robert Vanos
  • Patent number: 4311765
    Abstract: Shock absorbing unit which comprises a shaped resilient polyurethane composition characterized by being able to withstand compressive cycling and particularly being characterized by retaining a high degree of rebound after a multitude of compressive cycling cycles. The unit is suitable for use in a railroad draft gear. Such polyurethane composition for said shock absorbing unit is prepared by reacting specifically selected polyols with a corresponding balance of 1,5-naphthalene diisocyanates in combination with mixtures of certain polymeric polyols with a manipulation of their molecular weights.
    Type: Grant
    Filed: July 28, 1980
    Date of Patent: January 19, 1982
    Assignee: The Goodyear Tire & Rubber Company
    Inventor: Daniel A. Chung
  • Patent number: 4282979
    Abstract: An arrangement for resilient absorption of forces, particularly for an intermediate buffer coupling of rail vehicles, comprises an elongated housing having open and closed ends, a friction element located in the region of the open end of the housing, a resilient element cooperating in series with the friction element and formed as a friction spring including a plurality of inner conical rings and a plurality of outer conical rings cooperating with one another with interposition of lubricant, outer and inner cup-shaped casing members located in the housing and closeably accommodating the friction spring. The outer cup-shaped member forms a support for one end of the friction spring, whereas the inner cup-shaped member forms a support for the other end of the friction spring.
    Type: Grant
    Filed: June 1, 1979
    Date of Patent: August 11, 1981
    Assignee: Ringfeder G.m.b.H.
    Inventor: Josef Friedrichs
  • Patent number: 4265465
    Abstract: A spring assembly is carried by a mounting casting. The mounting casting includes a receptacle which is adapted to mount to a horizontal frame member by means of a vertical bolt which, when tightened, adjusts the elevation of the spring assembly by rotating the mounting casting about the frame member due to a shim effect achieved by the slight off-parallel alignment of the receptacle and the axes of the springs. This raises the spring assembly to take its weight off the draw bar and makes it easier to telescope the draw bar. A spring casting includes upper dogs for mounting an actuating lever which is rotatable between a latching and an unlatched position by vertical motion. A latch member on the draw bar is locked between the spring casting and the lever, but is released when the lever is lowered to permit the draw bar to be extended to the rear for alignment with a trailer hitch. Other improvements permit the use of coil springs without grinding the ends flat.
    Type: Grant
    Filed: August 17, 1979
    Date of Patent: May 5, 1981
    Assignee: DMI, Inc.
    Inventor: William J. Deitrich, Sr.
  • Patent number: 4262887
    Abstract: A friction spring unit has a friction spring including a plurality of inner rings and outer rings whose conical surfaces cooperate with each other with interposition of a lubricant, and an outer casing element and an inner casing element which shield the friction spring from outside and inside, respectively. The rings of the friction spring which are located at axial ends of the latter are sealingly connected with the inner casing element and the outer casing element. This sealing connection may be performed by interengaging beads and grooves, or flange-like projections and supports. The casing elements may be formed as hoses or each may be composed of at least two telescopable sleeves.
    Type: Grant
    Filed: June 1, 1979
    Date of Patent: April 21, 1981
    Assignee: Ringfeder GmbH
    Inventor: Harry Jansen
  • Patent number: 4214737
    Abstract: A shock absorber has a body with a bore and a secondary chamber housing a preloaded floating piston. An apertured piston and rod assembly with a float valve is retracted in the bore when the piston rod extending from the body is engaged by a moving body to be decelerated and smoothly stopped. A variable orifice head in the bore bleeds liquid through a series of passages to a return chamber which communicates with a hollow metering pin. This pin directs liquid through the piston and through outlets into a secondary chamber whose floating piston retracts against a spring as the chamber fills with liquid. This maintains a preload pressure upon the liquid in the bore and pressure chamber. The metering pin is tapered and is loosely received by the piston. When a load is axially applied to the piston rod retracting the pressure piston into the preloaded liquid within the body the liquid initially flows between the piston and metering pin.
    Type: Grant
    Filed: May 11, 1979
    Date of Patent: July 29, 1980
    Inventor: Leland F. Blatt
  • Patent number: 4159833
    Abstract: An elongated horizontal channel member is mounted by means of a dual spring shock absorber in transverse position on one end of a towing vehicle. A pair of horizontal support arms have a first pair of corresponding ends pivotally mounted on the channel member for shifting along the channel member and swinging relative to the channel member about upstanding axes shiftable along the channel member with the first pair of arm ends between first outwardly convergent positions and second substantially aligned positions generally paralleling the channel member with the first pair of arm ends disposed remote from each other and the second other pair of arm ends disposed adjacent each other.
    Type: Grant
    Filed: January 23, 1978
    Date of Patent: July 3, 1979
    Assignee: M & W Gear Company
    Inventor: Elmo R. Meiners
  • Patent number: 4147376
    Abstract: A resilient hitch linkage between a towing vehicle such as a tractor and an implement or attachment such as, for example, a rotary tiller, towed by the towing vehicle. The resilient hitch linkage serves to reduce the transmission of impact or shock loads and/or vibrations between the implement and the tractor and includes a front link pivotally connected to a hitch point on the tractor and a rear link pivotally connected to the attachment being towed. One of the pivoted links, such as the rear link, has a member with multiple flat exterior surfaces such as a member of rectangular cross section (a "square tube") secured thereto and extending laterally therefrom. The other pivoted link, such as the front link, has a first U-shaped clamp member secured thereto and lying on one side of the "square tube" carried by the one link. A pair of rubber cylinders are retained by the first clamp member.
    Type: Grant
    Filed: December 2, 1977
    Date of Patent: April 3, 1979
    Assignee: Allis-Chalmers Corporation
    Inventor: John J. Slazas
  • Patent number: 4118049
    Abstract: The invention concerns a new and novel device for connecting a beam or tow bar to a touring trailer or caravan. More particularly, the invention relates to a device for connecting two metallic components. The device comprises intermediate connecting components cut from a profile of light metal alloy. These components are mounted to the chassis and the towing beam and are made from a deformable, supple and insulating material so that these components provide an insulating media between different metals and, further, absorb the violent stresses transmitted to the towing beam.
    Type: Grant
    Filed: September 16, 1976
    Date of Patent: October 3, 1978
    Inventor: Roger Tunesi
  • Patent number: 4029307
    Abstract: The invention comprises a two directional cushioning device for towing trailers and the like behind a towing vehicle. The device has a first pair and second pair of parallel rods. The first pair of rods are joined at the outer forward ends for attachment to a towing vehicle. The second pair of parallel rods are joined at the outer rearward end for attachment to a vehicle being towed. The first and second pair of rods are aligned in parallel overlapping relation to one another and are slidably mounted in a pair of caps. One of the caps is adjacent the forward end of the first pair of rods and the other cap is adjacent the rearward end of the second pair of rods. A coil spring is mounted coaxially between the caps urging the caps apart under compression. Nuts are threaded onto the overlapping ends of rods limiting the caps' outward movement relative to one another.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: June 14, 1977
    Inventor: Carl J. Nielson
  • Patent number: 4027893
    Abstract: A force absorbing hitch for a vehicle is disclosed. The hitch is capable of at least partially absorbing external forces exerted on the hitch as would be common with the hitch attached to a vehicle for towing of a trailer or the like, particularly those encountered due to acceleration or deacceleration of the towing vehicle. The hitch includes a hitch plate upon which a hitch ball can be mounted with the hitch plate having a pair of rods extending from one edge through apertures in a pair of spaced walls of a frame attached to the rear of the vehicle. Between the walls a stop plate is fastened to the rods and springs surrounding the rods are located at each side of the stop plate on both rods. The frame can be elongated to serve as a bumper or bumper extension with the hitch centrally located on the bumper and below a recess, or step, in the bumper behind which a license plate can be mounted, if desired.
    Type: Grant
    Filed: October 31, 1975
    Date of Patent: June 7, 1977
    Inventor: Forrest R. Drudge
  • Patent number: 4018452
    Abstract: A push-pull coupling for tandem earthmoving scrapers is disclosed wherein the coupling may be rapidly connected or disconnected, thereby permitting the scrapers to operate either in unison or separately. A push block having a pulling hook projecting therefrom is mounted on the rear of a forward scraper, while a push block and a bail for engaging the hook are mounted on the front of a rearward scraper. Furthermore, at least two sets of two-way shock absorber assemblies which can absorb the shock loads caused in the course of the pushing or pulling operations are respectively connected between the push block of the rearward scraper and a reinforcing member fixedly secured to the front thereof.
    Type: Grant
    Filed: March 20, 1975
    Date of Patent: April 19, 1977
    Assignee: Kabushiki Kaisha Komatsu Seisakusho
    Inventors: Toshiaki Wagatsuma, Toshitaka Suketomo, Kouki Yoshida, Michio Suga
  • Patent number: 3990722
    Abstract: A shock absorbing trailer hitch for cushioning end thrust shocks between towing and towed vehicles is disclosed having a base member rigidly attached to one vehicle with a pair of upstanding slide guides thereon and a second member slidably supported within the slide guides by a pair of generally parallel extending slide members. The second member provides one connector for coupling the vehicles together and tongue weight between the vehicles is borne by the slide members. Movement of the second member relative to the first is limited between rigid stop positions and cushioning of end thrust shocks is provided by a resilient plug which mechanically engages the first and second members and urges the second member toward a position intermediate the rigid stop positions.
    Type: Grant
    Filed: June 5, 1975
    Date of Patent: November 9, 1976
    Assignee: Ajax Machine & Welding Company
    Inventors: Edward F. Casad, Richard E. Jones
  • Patent number: 3961813
    Abstract: This disclosure relates to a trailer hitch for coupling a draft vehicle to a drawn vehicle wherein the eye portion of the hitch includes a molded insert of flexible material having an axial bore extending therethrough adapted to receive the pintle portion of the hitch in coupling relation. The flexible insert completely surrounds the pintle and thus maintains the pintle in spaced relation from the eye for yieldingly restraining relative radial movement between the pintle and the eye during all phases of operation, including flexing in the vertical plane when the trailer is negotiating inclined ramps or the like.
    Type: Grant
    Filed: March 25, 1975
    Date of Patent: June 8, 1976
    Assignee: Southwire Company
    Inventor: O. Leon Thomas
  • Patent number: T100801
    Abstract: An energy-absorbing device comprising a permanently shortened member of a thermoplastic elastomer wherein said member comprises circumferentially enlarged portions due to permanent shortening by compression of an elongated member along its longitudinal axis of at least 10% of its original length, the enlarged portions being at least partially oriented and at least one unenlarged portion, and rigid retaining means encircling said unenlarged portion of the shortened thermoplastic elastomer member.
    Type: Grant
    Filed: September 26, 1980
    Date of Patent: July 7, 1981
    Inventor: Dominick Bianca