Source: http://www.google.com/patents/US6138580?dq=6101531
Timestamp: 2017-04-30 00:00:51
Document Index: 39132192

Matched Legal Cases: ['application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08', 'application No. 08']

Patent US6138580 - Temperature controlled composite boxcar - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA composite box structure having a core encapsulated in multiple layers of fiber reinforced plastic is provided. The core may be formed from various materials which provide improved resistance to heat transfer between the interior and the exterior of the composite box structure. The composite box structure...http://www.google.com/patents/US6138580?utm_source=gb-gplus-sharePatent US6138580 - Temperature controlled composite boxcarAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS6138580 APublication typeGrantApplication numberUS 09/020,372Publication dateOct 31, 2000Filing dateFeb 9, 1998Priority dateJul 19, 1996Fee statusLapsedPublication number020372, 09020372, US 6138580 A, US 6138580A, US-A-6138580, US6138580 A, US6138580AInventorsMell R. ThomanOriginal AssigneeTrn Business TrustExport CitationBiBTeX, EndNote, RefManPatent Citations (61), Non-Patent Citations (57), Referenced by (78), Classifications (15), Legal Events (8) External Links: USPTO, USPTO Assignment, EspacenetTemperature controlled composite boxcar
Technical advantages of the present invention include providing a temperature controlled composite boxcar that may satisfactorily maintain a set temperature, between 0° F. to 80° F., of products shipped in the boxcar. The present invention allows varying the length and/or the height of the composite box structure as desired for each application. Also, a temperature controlled composite boxcar incorporating teachings of the present invention may be economically used to ship frozen products, fresh products or dry food or non-food products, which do not require refrigeration or temperature control. A composite box structure incorporating teachings of the present invention allows increasing the length of the resulting temperature controlled composite boxcar without exceeding gross railway load limits. For some applications, a temperature controlled composite boxcar incorporating teachings of the present invention will have a cubic volume which is approximately 87% larger than the cubic volume of a corresponding conventional refrigerated boxcar and a weight carrying capacity 55% greater than that of a corresponding conventional refrigerated boxcar. Due to increased efficiency of the temperature control system, airflow management system and enhanced insulation of the composite box structure, the refrigeration or cooling system requires less fuel, which reduces the weight of the composite boxcar as compared to conventional refrigerated boxcars. As a result of the present invention, the maintenance and operating costs are lower and fuel costs are lower. Technical advantages of the present invention include maintaining a set temperature within the interior of the composite box structure with a consistent uniform airflow when the interior of the boxcar is loaded with products.
Refrigeration unit 142 may be a programmable unit able to control and maintain desired temperatures within composite box structure 30. Refrigeration unit 142 may include a keypad for inputting data for desired system performance and a microprocessor to control and monitor the functions and performance of refrigeration unit 142 and temperature control system 140. Refrigeration unit 142 may also include a satellite monitoring system (not shown expressly) or cellular technology to transmit to remote locations such information as the performance or location of refrigeration unit 142 or the temperature inside composite box structure 30. For some applications, refrigeration unit 142 may be a Model SB-III SR® "SMART REEFER" self-contained refrigeration system available from Thermo King, which is commonly used in motor carrier trailers and other large containers. Other providers of refrigeration units which may be satisfactorily used with the present invention include Carrier and Dring.
The selected foam core and multiple plies of fiber material are placed in a closed molding system having the desired configuration for first composite unit 40 or second composite unit 120. A resin delivery system is used to infuse or impregnate the multiple plies of fiber material with the selected resin. Depending upon the intended application for the resulting composite boxcar 20, the fiber material may include carbon, boron, graphite, glass, aramid or a combination of these materials. Aramids such as KEVLAR® fibers and NOMEX® fibers available from E.I. DuPont De Nemours & Co. may be particularly useful in fabricating railway boxcars. Other fiber materials may be satisfactorily used with the present invention. Again, depending upon the intended application for composite boxcar 20, the resin may be selected from a wide variety of polymers including epoxy, polyester, vinylester and vinyl. Also, other resins may be satisfactorily used with the present invention.
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