Towing attachment installable on work machine

{
  "publication_number": "US11794534B2",
  "country": "US",
  "kind": "B2",
  "title": "Towing attachment installable on work machine",
  "abstract": "Provided is a tow attachment that can be installed on a work machine as an attachment for towing a tow object. This tow attachment installable as a work machine attachment for towing a tow object is provided with: a body frame; a winch fixed on the body frame; a coupling part which is provided to the body frame so as to be mounted on the work machine; a movable pulley part which is equipped with a hook for coupling to the tow object and at least one movable pulley; and a wire fixing part which is provided to the body frame in order to fix a leading end of a wire that is let out of the winch, wherein the wire is applied on the movable pulley of the movable pulley part between the winch and the wire fixing part.",
  "claims": [
    "1. A towing attachment attachable as an attachment to a working machine in order to perform towing of a towing-target object, the towing attachment comprising: a body frame; a winch fixed on the body frame; a connecting unit provided on the body frame so as to be attached to the working machine; a movable pulley unit provided with a hook for connecting to a towing-target object and at least one movable pulley; and a wire fixing unit provided on the body frame so as to fix a leading end of a wire that is pulled out from the winch, wherein the wire is wound on the movable pulley in the movable pulley unit between the winch and the wire fixing unit, and the body frame includes a base having an upper surface to which the winch is fixed, and a wall that rises from the base and has the connecting unit provided thereon.",
    "2. The towing attachment attachable to a working machine according to claim 1, further comprising a fixed pulley unit that is configured by combining one or plural fixed pulleys provided on a common shaft and is fixed on the body frame, wherein the movable pulley unit is configured by combining a plurality of movable pulleys provided on a common shaft, and the wire is stretched in a reciprocated manner between the winch and the wire fixing unit and between each of movable pulleys in the movable pulley unit and each of fixed pulleys in the fixed pulley unit.",
    "3. The towing attachment attachable to a working machine according to claim 1, wherein the wall has a look-through portion in which a plurality of perforations are formed in order to secure a field of view from a back side of the wall to a front side thereof.",
    "4. The towing attachment attachable to a working machine according to claim 1, wherein an angle formed by the base and the wall in side view is perpendicular.",
    "5. The towing attachment attachable to a working machine according to claim 1, wherein an angle formed by the base and the wall in side view is an acute angle.",
    "6. The towing attachment attachable to a working machine according to claim 1, further comprising a plurality of legs projecting from a lower surface of the base, wherein the plurality of legs are provided near both a front end and a rear end of the base or provided only near the front end of the base.",
    "7. The towing attachment attachable to a working machine according to claim 6, wherein when the plurality of legs are provided near both the front end and the rear end of the base, a leg provided near the front end is longer than a leg provided near the rear end.",
    "8. The towing attachment attachable to a working machine according to claim 1, wherein the winch is a hydraulic winch.",
    "9. The towing attachment attachable to a working machine according to claim 2, wherein the wall has a look-through portion in which a plurality of perforations are formed in order to secure a field of view from a back side of the wall to a front side thereof.",
    "10. The towing attachment attachable to a working machine according to claim 2, wherein an angle formed by the base and the wall in side view is perpendicular.",
    "11. The towing attachment attachable to a working machine according to claim 2, wherein an angle formed by the base and the wall in side view is an acute angle.",
    "12. The towing attachment attachable to a working machine according to claim 2, further comprising a plurality of legs projecting from a lower surface of the base, wherein the plurality of legs are provided near both a front end and a rear end of the base or provided only near the front end of the base.",
    "13. The towing attachment attachable to a working machine according to claim 3, further comprising a plurality of legs projecting from a lower surface of the base, wherein the plurality of legs are provided near both a front end and a rear end of the base or provided only near the front end of the base.",
    "14. The towing attachment attachable to a working machine according to claim 4, further comprising a plurality of legs projecting from a lower surface of the base, wherein the plurality of legs are provided near both a front end and a rear end of the base or provided only near the front end of the base.",
    "15. The towing attachment attachable to a working machine according to claim 5, further comprising a plurality of legs projecting from a lower surface of the base, wherein the plurality of legs are provided near both a front end and a rear end of the base or provided only near the front end of the base."
  ],
  "description_excerpt": "The present invention relates to a towing attachment attachable to a working machine for towing a vehicle or the like.\n\nGenerally, when a towing-target vehicle is towed by a towing vehicle, a rear part of the towing vehicle is connected to a front part of the towing-target vehicle with a towing rope such as a wire rope, and towing is performed by driving the towing vehicle to travel forward. In order to stabilize such a towing operation, there have been proposed various techniques for suppressing shock, rocking, vibration, and the like at a connecting unit (Patent Literatures 1 to 3).\n\nLarge vehicles such as trucks, trailers, heavy machineries and the like of several tens of tons are used in large farm fields. When such a large vehicle is stuck in a soft ground such as mud in a farm field and is unable to move forward or backward, the vehicle is pulled out using a towing vehicle.\n\nPatent Literature 1: Japanese Patent Application Laid-open No. H9-175128\n\nPatent Literature 2: Japanese Patent Application Laid-open No. 2013-209045\n\nPatent Literature 3: Japanese Patent Application Laid-open No. 2010-269698\n\nHowever, in order to pull out a large vehicle by towing as quickly as possible when the large vehicle is stuck in a soft ground and becomes immovable, it is necessary to have a towing vehicle standby at the farm field at all times.",
  "cpc": [
    "B60D 1/185",
    "B60D 1/18",
    "B60D 1/187",
    "B66D 1/08",
    "B66D 1/28",
    "B66D 3/00",
    "B66F 9/12",
    "E02F 3/96",
    "E02F 9/003"
  ],
  "ipc": [
    "B60D 1/18",
    "B66D 1/08",
    "B66D 1/28",
    "E02F 3/96"
  ],
  "assignees": [
    "Agriproject Ltd Co"
  ],
  "inventors": [
    "Mitsuharu Fukayo"
  ],
  "filing_date": "2018-12-04",
  "publication_date": "2023-10-24",
  "grant_date": "2023-10-24",
  "priority_date": "2018-05-11",
  "application_number": "US-201817043860-A",
  "family_id": "68467373",
  "cited_by_count": 1,
  "citations": [
    "US2194623A",
    "JPS6341627B2",
    "JP2537406Y2",
    "JPH09175128A",
    "JP2004331313A",
    "US20080089767A1",
    "US7828270B2",
    "JP2010269698A",
    "JP2013209045A",
    "US20170217267A1",
    "JP6341627B1"
  ]
}