it is advantageous to define several terms before describing the invention . it should be appreciated that the following definitions are used throughout this application . where the definition of terms departs from the commonly used meaning of the term , applicant intends to utilize the definitions provided below , unless specifically indicated . for the purposes of the present invention , the term “ rack mount ” refers to a cabinet for housing computers and computer equipment , wherein the cabinet is standardized by the electronic industries alliance . for the purposes of the present invention , the term “ electrostatic discharge ” refers to a phenomenon that occurs when two materials come together and then separate . at the time of separation , electrons are transferred from one material to the other ; the material losing electrons is positively charged , and the material gaining electrons is negatively charged . for the purposes of the present invention , the term “ electrostatically stable ” refers to a situation or environment in which an electrostatic discharge event will not occur . for the purposes of the present invention , the term “ conductive ” refers to a having a high mobility of charge so that the potential on the surface is retained for only a very short time . for the purposes of the present invention , the term “ static - dissipative ” refers allowing a charge to migrate over a surface in a time that is short compared to the time scale of the actions creating the charge or the time within which this charge will be effective or will cause an electrostatic problem . for the purposes of the present invention , the term “ grounding ” refers to having uniform electrical potential established in an area ensuring uniformity of electrical potential of all objects . for the purposes of the present invention , the term “ computer equipment ” refers to any equipment of , relating to , compatible with , or accessory to computers including but not limited to computers , servers , ethernet switches , and batteries . for the purposes of the present invention , the term “ computer accessories ” refers to any suitable accessory to a computer including but not limited to keyboards , mice , and speakers . the present invention is directed to a mobile , electro - statically stable cart for storing and transporting computer equipment in a rack mount configuration . the cart of the present invention allows computer equipment such as servers that are typically rack mounted in a stationary position to be safely mounted in a mobile configuration . one embodiment of the cart is shown in fig1 . as shown in fig1 , cart 100 includes a base 101 having an upper surface and a lower surface and a front side and back side . wheels 102 are attached to the lower surface of base 101 . base 101 preferably has four corners and a wheel 102 attached proximal to each of said corners ; however , base 101 could be any desired and functionally feasible shape and any desired number of wheels could be attached to the base . wheels 102 are anti - static , being either conductive or static dissipative so as to promote grounding . the wheels can be conductive as for example , model 5mc metro conductive stem casters sold by intermetro industries corporation , north washington street , wilkes - barrie , pa . 18705 . the casters conform to federal specification ff - c - 88 c . support rails 103 are attached to the upper surface of base 101 and extend vertically to top panel 105 . there are at least four and preferably six support rails attached to base 101 including two front rails , two middle rails , and two rear rails . each rail includes as series of holes 104 which serve as an attachment mechanism for computer equipment including but not limited to servers , batteries , and ethernet switches , that can be attached directly to the support rails 103 . fig2 illustrates a cart 200 wherein computer equipment 214 is directly attached to cart 200 at holes 204 within rails 203 . in order to provide proper support of the equipment , it is critical that the rails 203 and the holes 204 within are aligned with one another . the computer equipment 214 is attached at the two front rails and extends back toward the middle and back rails , which provide support as needed . further equipment can be attached to the middle and back rails . rear panel 106 extends from the base 101 to the top panel 105 to enclose the backside of the cart 100 . rear panel 106 preferably includes vents 107 to allow for ventilation of the stored equipment and at least one access hole 113 to allow passage of equipment cords and data links and / or provide immediate access to equipment located in the back of the cart . further rear panel 106 is removable to provide further access to equipment and wires in the rear of the cart 100 . as shown in fig2 , cart 200 further comprises side panels 206 to enclose the space between support rails 203 . side panels 206 are preferably vented so as to allow for ventilation of stored equipment . this is preferably accomplished through the use of mesh 215 in the side panels 206 , but can also be accomplished by incorporating vents into side panels 206 such as vents 107 shown in rear panel 106 . mesh 215 provides maximum ventilation while still providing some protection to the equipment 214 stored within the cart . a top panel 105 , parallel to the base 101 , sits atop and is attached to the support rails 103 . top panel 105 indirectly supports computer accessories such as a keyboard 110 or monitor 111 as shown in fig1 , or , alternately , top panel 205 directly supports computer accessories such as keyboard 210 and monitor 211 as shown in fig2 . for indirect support as in fig1 , an equipment platform 108 directly supports the keyboard 110 and monitor 111 while be suspended above and attached to top panel 105 by platform support 109 . equipment platform 108 preferably includes handles 112 extending from both the front and rear of the platform . having equipment platform 108 suspended above top panel 105 provides for additional space to transport further equipment , documents , etc . for direct support as in fig2 , the computer accessories rest directly on the top panel 205 while a handle 212 protrudes directly from the top panel 205 . as shown in fig2 , other computer accessories such as a mouse support 213 can be included on the top of the cart . top panel 105 or 205 can also include at least one hole 216 for passage of cords , cables , etc . in order to ensure electrical stability of the cart and thereby prevent electro - static discharge ( esd ) events , the cart includes several anti - static measures as shown in fig3 . as discussed above , wheels 302 are anti - static , either conductive or static dissipative , to promote grounding of the cart . to further promote grounding , a drag chain 315 is suspended from cart 300 to contact the floor . drag chain 315 is preferably made of brass and is suspended from base 301 . cart 300 is also equipped with at least one , and preferably four , wrist strap grounding points 317 preferably located at top panel 305 . wrist straps connected to the wrist strap grounding points 317 attach to the user ( s ) of the cart thereby keeping the user ( s ) at the same electrical potential as the cart to avoid and esd event . further , all side and rear cart access panels have ground points which are connected to the cart 300 at all times . even when the panels are removed from the cart , they are connected by a wire to the cart as shown in fig4 . the wire 400 and 402 provide a grounded connection between the cart and the panels . finally , the cart is preferably painted with static dissipative paint . further safety features can be added to the cart such as a seismic tie down point 318 attached to base 301 or a static dissipative mat placed under the cart or on a portion of the cart such as the base or the top panel . static dissipative mats are preferably made of either rubber or vinyl and have characteristics similar to static dissipative paint by controlling the rate of electrical discharge . when a mat is used under the cart , the mat is connected to a ground point through the use of a ground lead kit . the cart of the present invention preferably has about the same width dimensions as an industry standard 19 - inch computer rack mount . therefore , computer servers and other equipment for which the industry standard racks are designed can fit within the cart , thereby making them mobile . specifically , the width of the cart from the inside edge of one front , middle , or rear support rail to the inside edge of the adjacent front , middle , or rear support rail is at least about 17 inches , preferably about 17¾ inches ; the width of the cart from the holes on one front , middle , or rear support rail to the holes on the adjacent front , middle , or rear support rail is at least about 18 inches , preferably about 18 5 / 16 inches ; and the width of the cart from the outside edge of one front , middle , or rear support rail to the outside edge of the adjacent front , middle , or rear support rail is at least about 20 inches , preferably about 20 7 / 16 inches . while the 19 inch rack dimensions are preferred , the cart could also have other width dimensions as desired such as the width dimensions of an industry standard 23 inch rack , i . e . the width of the cart from the inside edge of one front , middle , or rear support rail to the inside edge of the adjacent front , middle , or rear support rail is at least about 21 inches , preferably about 21¾ inches ; the width of the cart from the holes on one front , middle , or rear support rail to the holes on the adjacent front , middle , or rear support rail is at least about 22 inches , preferably about 22 5 / 16 inches ; and the width of the cart from the outside edge of one front , middle , or rear support rail to the outside edge of the adjacent front , middle , or rear support rail is at least about 24 inches , preferably about 24 7 / 16 inches . regardless of the width of cart , the depth of the cart from the front of the base to the rear of the base is at least about 30 inches , and preferably about 32 inches . while the height of the cart can vary , the preferred heights are 10 u or 14 u . 1 u equal about 1 . 75 inches ; therefore , the 10 u cart yields about 17 . 5 inches in usable rack height from base to top panel while the 14 u cart yields about 24 . 5 inches in usable rack height from base to top panel . all documents , patents , journal articles and other materials cited in the present application are hereby incorporated by reference . although the present invention has been fully described in conjunction with several embodiments thereof with reference to the accompanying drawings , it is to be understood that various changes and modifications may be apparent to those skilled in the art . such changes and modifications are to be understood as included within the scope of the present invention as defined by the appended claims , unless they depart therefrom .
the present invention provides a mobile , electro - statically stable cart for storing and transporting computers , computer accessories , and sensitive computer equipment such as servers , ethernet switches , and batteries . the body of the cart is configured to receive equipment in a portable rack mount fashion while providing protection against electro - static discharge events using anti - static wheels , either conductive or static dissipative , drag chains , grounding points , and static dissipative paint .