This invention relates to an improved self-aligning automatic or remotely operated system for latching and unlatching the tailgate mechanism of a rear-loading refuse compacting truck which uses the tailgate lifting hydraulic cylinders in conjunction with an hydraulic cylinder-operated latch pin pulling...http://www.google.com.tw/patents/US5158340?utm_source=gb-gplus-share專利 US5158340 - Tailgate mechanism for rear loading compactor
