Crank handle drive device

{
  "publication_number": "US10496123B1",
  "country": "US",
  "kind": "B1",
  "title": "Crank handle drive device",
  "abstract": "Various implementations include a handle attachment device. The device includes a body and a drive shaft. The body has a first portion and a second portion. Each of the first portion and second portion defines at least one fastener opening. Each of the at least one fastener opening defined by the first portion is alignable with one of the at least one fastener opening defined by the second portion. The first portion and the second portion are clampable on a crank when the device is in a mounted position. The crank has a crank rotational axis.",
  "claims": [
    "1. A handle attachment device, the device comprising: a body having a first portion, a second portion, and an intermediate portion, each of the first portion and second portion defining at least one fastener opening, wherein each of the at least one fastener opening defined by the first portion is alignable with one of the at least one fastener opening defined by the second portion, the first portion and the second portion being clampable on a crank when the device is in a mounted position, the crank having a crank rotational axis, wherein the intermediate portion extends between the first portion and second portion, wherein a portion of the crank along the crank rotational axis is disposed between the at least one fastener opening defined by the first portion and the intermediate portion when the device is in the mounted position, wherein the at least one fastener opening comprises a first fastener opening, a second fastener opening, and a third fastener opening; and a drive shaft coupled to the body, the drive shaft having a drive shaft axis, an end distal to the body, and an engagement head coupled to the end, wherein the drive shaft axis is coincident with the crank rotational axis when the body is clamped to the crank in the mounted position.",
    "2. The device of claim 1, further comprising an intermediate portion extending between the first portion and second portion, wherein a portion of the crank along the crank rotational axis is disposed between the first fastener opening and the intermediate portion when the device is in the mounted position.",
    "3. The device of claim 1, wherein a portion of the crank transverse to the crank rotational axis is disposed between the first fastener opening and the third fastener opening when the device is in the mounted position.",
    "4. The device of claim 3, wherein the portion of the crank transverse to the crank rotational axis is disposed between the second fastener opening and the third fastener opening when the device is in the mounted position.",
    "5. The device of claim 1, further comprising at least one fastener, wherein each of the at least one fastener is disposable in one of the at least one fastener openings.",
    "6. The device of claim 1, wherein the engagement head is shaped to engage a bit, the bit being couplable to a driver.",
    "7. The device of claim 6, wherein the engagement head is a standard hex head.",
    "8. The device of claim 1, wherein drive shaft is welded to the body.",
    "9. The device of claim 1, wherein the body comprises a rust resistant material.",
    "10. The device of claim 9, wherein the body comprises stainless steel.",
    "11. The device of claim 1, wherein the drive shaft comprises a rust resistant material.",
    "12. The device of claim 11, wherein the drive shaft comprises stainless steel."
  ],
  "description_excerpt": "Manual crank handles are used on trailer jacks to lower and raise the trailer coupler onto and off of the receiver hitch of a vehicle. Typically, the jack includes a series of gears to drive the jack foot vertically, which raises or lowers the end of the trailer. The trailer jack includes a manual crank handle to drive the jack. However, these jacks can require a large amount of torque to raise the trailer depending on the load that the trailer is carrying, making it difficult for some users to operate.\n\nThus, a need exists for a device that is cheap and easy to use that enables a user to easily operate a manual crank handle.\n\nExample features and implementations are disclosed in the accompanying drawings. However, the present disclosure is not limited to the precise arrangements and instrumentalities shown.\n\nFIG. 1 is a side view and an end view of a handle attachment device, according to one implementation.\n\nFIG. 2 is a sectional view of the handle attachment device of FIG. 1 along section line A-A.\n\nFIG. 3 is a side view of a crank, according to another implementation.\n\nFIG. 4 is a perspective view of the handle attachment device of FIG. 1 in the mounted position on the crank of a trailer jack.\n\nVarious implementations include a handle attachment device. The device includes a body and a drive shaft. The body has a first portion and a second portion. Each of the first portion and second portion defines at least one fastener opening. Each of the at least one fastener opening defined by the first portion is alignable with one of the at least one fastener opening defined by the second portion.",
  "cpc": [
    "G05G 1/085",
    "B60D 1/465",
    "B60S 9/04",
    "Y10T 74/20744"
  ],
  "ipc": [
    "B60D 1/46",
    "G05G 1/08"
  ],
  "assignees": [
    "Ez Jack LLC"
  ],
  "inventors": [
    "Joe R. Palermo, Jr.",
    "Trevor W. Richard"
  ],
  "filing_date": "2019-04-11",
  "publication_date": "2019-12-03",
  "grant_date": "2019-12-03",
  "priority_date": "2019-04-11",
  "application_number": "US-201916381276-A",
  "family_id": "68695753",
  "cited_by_count": 6,
  "citations": [
    "US7204788B2",
    "US20070257243A1",
    "US20100263476A1",
    "US9039000B2",
    "US20140335987A1",
    "US20140375092A1"
  ]
}