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item_id: e69f65111271494a8d3c8e1db3446850
item_updated_time: 1764345559517
title_diff: "[{\"diffs\":[[1,\"US6210088B1 - Chassis conversion device - Goo\"]],\"start1\":0,\"start2\":0,\"length1\":0,\"length2\":45}]"
body_diff: "[{\"diffs\":[[1,\"<html>\\\r\\\n<head>\\\r\\\n  <title>US6210088B1 - Chassis conversion device - Google Patents</title>\\\r\\\n  <basefont face=\\\"微软雅黑\\\" size=\\\"2\\\" />\\\r\\\n  <meta http-equiv=\\\"Content-Type\\\" content=\\\"text/html;charset=utf-8\\\" />\\\r\\\n  <meta name=\\\"exporter-version\\\" content=\\\"YXBJ Windows/608924 (zh-CN, DDL); Windows/10.0.0 (Win64); EDAMVersion=V2;\\\"/>\\\r\\\n  <style>\\\r\\\n\\tbody, td {\\\r\\\n\\t  font-family: 微软雅黑;\\\r\\\n\\t  font-size: 12pt;\\\r\\\n\\t}\\\r\\\n  </style>\\\r\\\n</head>\\\r\\\n<body>\\\r\\\n<a name=\\\"3825\\\"></a>\\\r\\\n<h1>US6210088B1 - Chassis conversion device - Google Patents</h1>\\\r\\\n\\\r\\\n<div><span>\\\n  <div style=\\\"--en-clipped-content:article\\\">\\\n<div><br/></div><div style=\\\"font-size: 16px; display:block; min-width: 100%; position: relative;\\\"> <div style=\\\"min-width:100%;\\\"><div style=\\\"transition:none 0s ease 0s;min-width:100%;background-color:rgb(255, 255, 255);font-family:Roboto, sans-serif;color:rgb(51, 51, 51);overflow-anchor:none;\\\"><span><span style=\\\"font-size:13px;\\\"><span style=\\\"min-width:350px;\\\"><div><div><div><div><div style=\\\"color:rgb(51, 51, 51);\\\"><span><span><div><div style=\\\"overflow:auto;\\\"><div style=\\\"outline:0px;\\\"><div><div style=\\\"min-width:0px;word-break:break-word;\\\"><div><span><div><div style=\\\"line-height:20px;min-width:0px;\\\"><div lang=\\\"EN\\\">\\\n    \\\n    <span style=\\\"display:block;font-weight:500;font-size:13px;\\\">FIELD OF THE INVENTION</span>\\\n    <div style=\\\"margin-block:1em;\\\">The present invention relates generally to freight accommodation devices and, more particularly, to load retainers having twist locks.</div>\\\n    <span style=\\\"display:block;font-weight:500;font-size:13px;\\\">BACKGROUND OF THE INVENTION</span>\\\n    <div style=\\\"margin-block:1em;\\\">Box-like containers are typically used to transport goods in interstate commerce. To ease burdens required in moving these containers by ship, train, truck, etc., the International Standards Organization (ISO) has required uniform dimensions. While many standard sizes have been approved by the ISO, containers having lengths of twenty feet and forty feet have gained widespread acceptance in the United States since they can be most easily and economically hauled over-the-road on trailers.</div>\\\n    <div style=\\\"margin-block:1em;\\\">Commonly used to haul 40′ ISO containers are trailers having a 40′ gooseneck-type chassis with an elevated forward portions to accommodate the 5<sup>th </sup>wheel couplers of towing tractors. The elevated forward portion of the chassis carries a pair of rearwardly directed pins for attachment to specialized castings at the front of a 40′ ISO container and the rearward portion of the chassis has a pair of vertically oriented twist locks for attachment to castings at the rear of the container. Unfortunately, this container attachment system does not permit a pair of 20′ ISO containers positioned in tandem to be attached to the chassis thereby limiting its utility.</div>\\\n    <span style=\\\"display:block;font-weight:500;font-size:13px;\\\">SUMMARY OF THE INVENTION</span>\\\n    <div style=\\\"margin-block:1em;\\\">In light of the problems associated with the known trailers for hauling ISO containers, it is a principal object of the invention to provide a device that is easily attached to the top of a gooseneck-type chassis that will convert it to one capable of hauling a single 40′ ISO container or a pair of 20′ ISO containers. In either hauling situation, operation of a gooseneck-type chassis carrying the inventive device along with one or more ISO containers will be in conformity with current highway regulations.</div>\\\n    <div style=\\\"margin-block:1em;\\\">It is another object of the invention to provide a chassis conversion device of the type described that can be rapidly installed upon a gooseneck-type chassis without prolonged periods of instruction, without specialized tools, and without resort to modifying the chassis in any way. The chassis conversion device can also be installed upon gooseneck-type chassis of various makes and models.</div>\\\n    <div style=\\\"margin-block:1em;\\\">It is a further object of the invention to provide a chassis conversion device that can be easily detached from a chassis when its use is not required. Lifting the device from a chassis is easily accomplished by means of a conventional forklift. The forklift may be utilized to safely stack a plurality of chassis conversion devices atop one another to conserve space when use of the devices is not required.</div>\\\n    <div style=\\\"margin-block:1em;\\\">It is an object of the invention to provide improved elements and arrangements thereof in a chassis conversion device for the purposes described that is lightweight in construction, inexpensive to manufacture, and dependable in use.</div>\\\n    <div style=\\\"margin-block:1em;\\\">Briefly, the chassis conversion device in accordance with this invention achieves the intended objects by featuring an elongated frame with a pair of ISO corner castings affixed to each of its front and rear ends. A pair of twist locks is affixed to both the front and rear ends of the frame. Two additional pairs of twist locks are affixed to the frame adjacent its midpoint. The latter two pairs of twist locks are selectively retractable so that they may be lowered beneath the top of the frame. The frame also includes a pair of lateral conduits for slidably receiving the projecting prongs of a forklift.</div>\\\n    <div style=\\\"margin-block:1em;\\\">The foregoing and other objects, features and advantages of the present invention will become readily apparent upon further review of the following detailed description of the preferred embodiment as illustrated in the accompanying drawings.</div>\\\n    \\\n    \\\n    <span style=\\\"display:block;font-weight:500;font-size:13px;\\\">BRIEF DESCRIPTION OF THE DRAWINGS</span>\\\n    <div style=\\\"margin-block:1em;\\\">The present invention may be more readily described with reference to the accompanying drawings, in which:</div>\\\n    <div style=\\\"margin-block:1em;\\\">FIG. 1 is a top view of a chassis conversion device in accordance with the present invention.</div>\\\n    <div style=\\\"margin-block:1em;\\\">FIG. 2 is a front view of the chassis conversion device of FIG. <b>1</b>.</div>\\\n    <div style=\\\"margin-block:1em;\\\">FIG. 3 is a cross-sectional view taken along line <b>3</b>—<b>3</b> of FIG. <b>1</b>.</div>\\\n    <div style=\\\"margin-block:1em;\\\">FIG. 4 is a cross-sectional view taken along line <b>4</b>—<b>4</b> of FIG. <b>1</b>.</div>\\\n    <div style=\\\"margin-block:1em;\\\">FIG. 5 is a side view of the chassis conversion device being positioned upon a gooseneck-type chassis and receiving a pair of ISO containers.</div>\\\n    <div style=\\\"margin-block:1em;\\\">Similar reference characters denote corresponding features consistently throughout the accompanying drawings.</div>\\\n    \\\n    \\\n    <span style=\\\"display:block;font-weight:500;font-size:13px;\\\">DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT</span>\\\n    <div style=\\\"margin-block:1em;\\\">Referring now to the FIGS., a chassis conversion device in accordance with the present invention is shown at <b>10</b>. Device <b>10</b> includes an elongated frame <b>12</b> formed from metallic tubing. The front and rear ends of frame <b>12</b> are each provided with a pair of ISO corner castings <b>14</b> and <b>16</b> for coupling to complementary fittings <b>18</b> and <b>20</b> on a 40′ gooseneck-type chassis <b>22</b>. Twist locks <b>24</b> and <b>26</b> are affixed atop castings <b>14</b> and <b>16</b> for coupling to ISO corner castings <b>28</b> at the outer ends of a pair of 20′ ISO containers <b>30</b> positioned in tandem. Near the center of frame <b>12</b>, two pairs of retractable twist locks <b>32</b> and <b>34</b> are provided for coupling to ISO corner castings <b>36</b> at the inner ends of containers <b>30</b>.</div>\\\n    <div style=\\\"margin-block:1em;\\\">Frame <b>12</b> includes a pair of beams <b>38</b> and <b>40</b> each about 40′ long and separated at a distance equal to the width of containers <b>30</b>. Beams <b>38</b> and <b>40</b> are connected at their front and rear ends by end braces <b>42</b> and <b>44</b>. It should be noted that end brace <b>42</b> is a flat plate secured to the tops of beams <b>38</b> and <b>40</b> to provide clearance for the elevated front portion of chassis <b>22</b>. Substantially equidistantly spaced from end braces <b>42</b> and <b>44</b> and from one another, cross braces <b>46</b>, <b>48</b> and <b>50</b> also connect beams <b>38</b> and <b>40</b> together. A pair of longerons <b>52</b> and <b>54</b>, oriented parallel to beams <b>38</b> and <b>40</b>, connect and reinforce cross braces <b>46</b>, <b>48</b> and <b>50</b>.</div>\\\n    <div style=\\\"margin-block:1em;\\\">Penetrating beams <b>38</b> and <b>40</b> and longerons <b>52</b> and <b>54</b> are a pair of conduits <b>56</b> and <b>58</b> for slidably receiving the projecting prongs of a conventional forklift (not shown). Conduits <b>56</b> and <b>58</b> are, like beams <b>38</b> and <b>40</b>, braces <b>44</b>-<b>50</b>, and longerons <b>52</b> and <b>54</b>, metallic tubes of rectangular cross section. As shown, conduits <b>56</b> and <b>58</b> are positioned parallel to one another and straddle the midpoint of frame <b>12</b> so that frame <b>12</b> is balanced when elevated and transported by a forklift.</div>\\\n    <div style=\\\"margin-block:1em;\\\">Additional features are provided to frame <b>12</b> for purposes of stiffening and reinforcement. Gussets <b>60</b>, for example, connect beams <b>38</b> and <b>40</b> to corner castings <b>14</b>. Gussets <b>62</b>, on the other hand, connect beams <b>38</b> and <b>40</b> to end brace <b>44</b> and corner castings <b>16</b>. Beams <b>38</b> and <b>40</b> and cross braces <b>46</b> and <b>50</b> are connected by gussets <b>64</b>. Struts <b>66</b> serve the dual purpose of connecting the opposite ends of cross brace <b>48</b> to beams <b>38</b> and <b>40</b> and preventing inadvertent side impacts with twist locks <b>32</b> and <b>34</b>.</div>\\\n    <div style=\\\"margin-block:1em;\\\">Twist locks <b>24</b>, <b>26</b>, <b>32</b> and <b>34</b> are conventional in construction. Preferably, twist locks <b>24</b> and <b>26</b> are of the type shown in U.S. Pat. No. 2,963,310 issued to Andrew A. Abolins on Dec. 6, 1960, and incorporated for all purposes herein. Twist locks <b>32</b> and <b>34</b>, however, are retractable and hinged so that their locking elements may be pivoted from an upright position for insertion into corner castings <b>28</b> to a stowed position beneath the top of frame <b>12</b> illustrated by broken lines in FIG. <b>4</b>. Twist locks <b>32</b> and <b>34</b> may be of the type shown in U.S. Pat. No. 5,160,224 issued to Phillip Schwiebert on Nov. 3, 1992, and incorporated for all purposes herein. Of course, numerous manufacturers produce twist locks of varied construction and many equivalents may be substituted for the twist locks described hereinabove.</div>\\\n    <div style=\\\"margin-block:1em;\\\">Use of chassis conversion device <b>10</b> is straightforward. First, with a forklift whose prongs are inserted into conduits <b>56</b> and <b>56</b>, device <b>10</b> is set atop gooseneck-type chassis <b>22</b> so that corner castings <b>14</b> and <b>16</b> are in receipt of fastening elements <b>18</b> and <b>20</b>. Fastening element <b>20</b>, being a twist lock, is next rotated ninety degrees to lock device <b>10</b> to chassis <b>22</b>. With twist locks <b>32</b> and <b>34</b> in an upright orientation as illustrated in FIG. 5, containers <b>30</b> are set atop device <b>10</b>. Twist locks <b>24</b>, <b>26</b>, <b>32</b> and <b>34</b> are rotated ninety degrees to lock containers <b>30</b> in place atop device <b>10</b>. Chassis <b>22</b> may now be towed anywhere roadway conditions permit. Containers <b>30</b> and device <b>10</b> may be offloaded upon arrival at a chosen destination, if desired, simply by reversing the steps outlined above.</div>\\\n    <div style=\\\"margin-block:1em;\\\">A single 40′ ISO container may be substituted for the pair of 20′ ISO containers <b>30</b> and positioned for transport atop device <b>10</b> on chassis <b>22</b>. To do this, twist locks <b>32</b> and <b>34</b> are rotated to the lowered, broken line position illustrated in FIG. 4 so that they will not interfere with the positioning of the 40′ ISO container, having couplings only at its eight corners, upon device <b>10</b>. Then, the 40′ ISO container is set upon device <b>10</b> and its corner couplings are locked in the usual manner to twist locks <b>24</b> and <b>26</b>. The 40′ ISO container may now be transported as desired. Thus, device <b>10</b> permits a standard 40′ gooseneck-type chassis <b>22</b> to carry either one 40′ ISO container or a pair of 20′ ISO containers.</div>\\\n    <div style=\\\"margin-block:1em;\\\">While the invention has been described with a high degree of particularity, it will be appreciated by those skilled in the art that modifications may be made thereto. For example, while frame <b>12</b> has been described in relation to a 40′ gooseneck-type chassis, it may be scaled up or down to accommodate chassis of any desired dimensions. Therefore, it is to be understood that the present invention is not limited to the sole embodiment described above, but encompasses any and all embodiments within the scope of the following claims.</div>\\\n    \\\n  </div></div></div></span></div></div></div></div></div></div></span></span></div></div></div></div></div></span></span></span></div></div></div>\\\n</div>\\\n</span>\\\n</div></body></html>\\u0000\"]],\"start1\":0,\"start2\":0,\"length1\":0,\"length2\":13413}]"
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updated_time: 2025-11-28T21:04:01.709Z
created_time: 2025-11-28T21:04:01.709Z
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