Scissor lift that locks at a variable height

{
  "publication_number": "US9750323B2",
  "country": "US",
  "kind": "B2",
  "title": "Scissor lift that locks at a variable height",
  "abstract": "A scissor lift for raising and lowering a heavy object, including an upper platform for supporting a heavy object, including a release mechanism, and guided rollers mounted on axles, a lower frame including guided rollers mounted on axles, a scissor lift mechanism fastened to the axles of the upper platform guided rollers and to the axles of the lower frame guided rollers, that raises and lowers the upper platform, a locking mechanism including protrusions protruding outward of the upper frame, each protrusion corresponding to a different height of the scissor lift mechanism, wherein at least one guided roller within the upper platform includes a spring-loaded pin for engagement in the protrusions, thereby locking the scissor lift mechanism into place at a height corresponding to the protrusion into which the spring-loaded pin is engaged, and a release mechanism that unlocks the scissor lift mechanism.",
  "claims": [
    "1. A scissor lift for raising and lowering a heavy object, comprising: an upper platform for supporting a heavy object, comprising guided rollers mounted on axles; a lower frame comprising guided rollers mounted on axles; a scissor lift mechanism fastened to the axles of said upper platform guided rollers and to the axles of said lower frame guided rollers, that raises and lowers said upper platform; a locking mechanism comprising protrusions protruding outward of said upper platform, each protrusion corresponding to a different height of said scissor lift mechanism, wherein at least one of the guided rollers within said upper platform comprises a spring-loaded pin for engagement in the protrusions, thereby locking said scissor lift mechanism into place at a height corresponding to the protrusion into which the spring-loaded pin is engaged; and a release mechanism that unlocks said scissor lift mechanism, comprising a shaft, outside of said upper platform, with capped pins that are bound within said protrusions and that move further into said protrusions, to disengage said spring-loaded pin from the protrusion into which said spring-loaded pin is engaged, when said shaft is pushed towards said upper platform.",
    "2. The scissor lift of claim 1 wherein said upper platform comprises a slit through which a top portion of said scissor lift mechanism connects to the axles of said guided rollers in said upper platform.",
    "3. The scissor lift of claim 1 wherein said release mechanism comprises a release lever that, when lifted, disengages said spring-loaded pin from the protrusion in which said spring-loaded pin is engaged, thereby unlocking said scissor lift mechanism.",
    "4. The scissor lift of claim 3 wherein said release mechanism comprises: a first rod inside said upper platform that moves downward when said release lever is lifted; and a second rod that extends outside of said upper platform through a slit in said upper platform, and that pushes said shaft towards said upper platform when said first rod moves downward.",
    "5. The scissor lift of claim 4 wherein said release mechanism comprises a spring-loaded slideable block with an inclined plane, wherein said first rod presses on said inclined plane when said first rod moves downward, causing said block to slide in a first direction, wherein said second rod is connected to said block, and wherein the spring load of said block causes said block to slide in a direction opposite to the first direction when said first rod ceases to press on said inclined plane.",
    "6. The scissor lift of claim 5 wherein said second rod slides in the first direction and in the opposite direction via the slit in said upper platform.",
    "7. The scissor lift of claim 1 wherein said release mechanism comprises a bar in a handle that, when pushed downward, disengages said spring-loaded pin from the protrusion in which said spring-loaded pin is engaged, thereby unlocking said scissor lift mechanism.",
    "8. The scissor lift of claim 7 wherein said release mechanism comprises a rod that extends outside of said upper platform through a slit in said upper platform, and that pushes said shaft towards said upper platform when said handle bar moves downward.",
    "9. The scissor lift of claim 8 wherein said release mechanism comprises a spring-loaded slideable block with an inclined plane, wherein said handle bar presses on said inclined plane when said handle bar moves downward, causing said block to slide in a first direction, wherein said rod is connected to said block, and wherein the spring load of said block causes said block to slide in a direction opposite to the first direction when said handle bar ceases to press on said inclined plane.",
    "10. The scissor lift of claim 9 wherein said rod slides in the first direction and in a direction opposite to the first direction via the slit in said upper platform."
  ],
  "description_excerpt": "This application is a continuation of U.S. patent application Ser. No. 14/687,930, now U.S. Pat. No. 9,387,869, entitled LUGGAGE WITH MECHANICALLY INTEGRATED TROLLEY, and filed on Apr. 16, 2015 by inventor Aviad Berger.\n\nThe present invention relates to luggage, such as a suitcase, with an integrated trolley that raises and lowers the luggage.\n\nConventional luggage trolleys have several drawbacks. A first drawback is that a traveler must either bring a trolley with him, or rely on a trolley being available when he needs one. A second drawback is that a conventional trolley does not enable the traveler to lift his luggage. Often a traveler wants to put in item into his luggage or remove an item from his luggage when the luggage is on a trolley, and there is no way to do so other than to either bend down to reach the luggage, or lift the luggage from the trolley onto an elevated surface. Similarly, the traveler may be packing or unpacking his luggage while it is placed on an elevated surface, and there is no way to close the luggage and stand it on its wheels other than to lift the luggage from the elevated surface and lower it to the floor. A third drawback is that conventional luggage, when dragged on its wheels by a traveler, leans towards the traveler and the traveler must bear some of the weight of the luggage. A fourth drawback is that conventional luggage is pulled behind a traveler, and the traveler cannot see if the luggage collides with another traveler or an obstacle.",
  "cpc": [
    "A45C 15/00",
    "A45C 13/385",
    "A45C 2009/007",
    "A45C 5/03",
    "A45C 5/14",
    "B62B 2202/24",
    "B62B 2203/10",
    "B62B 2205/06",
    "B62B 2206/06",
    "B62B 3/008",
    "B62B 3/022",
    "B62B 3/0625",
    "B66F 7/065"
  ],
  "ipc": [
    "A45C 15/00",
    "A45C 5/03",
    "B62B 3/00",
    "B62B 3/02",
    "B62B 3/06",
    "B66F 7/06"
  ],
  "assignees": [
    "BERGER AVIAD"
  ],
  "inventors": [
    "BERGER AVIAD"
  ],
  "filing_date": "2016-06-13",
  "publication_date": "2017-09-05",
  "grant_date": "2017-09-05",
  "priority_date": "2015-04-16",
  "application_number": "US-201615180097-A",
  "family_id": "56320936",
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