在欧盟地区的城市公交车,部分带有液压侧向倾斜调节功能,以方便乘客,特别是老年人、轮椅车和婴儿车上下。针对带液压倾斜公交车的出现,位于德国中部卡塞尔市的一家公司设计出专门用在公交车站的混凝土路缘石,并申请了专利(编辑注:专利仍有效)、注册产品专用商标Kassel R。由于该种产品在德国卡塞尔市首次应用,就获得政府、公众的一致称赞,卡塞尔路缘石很快风靡全欧洲,并在其它国家也得到推广应用。 City buses in the EU are partially equipped with hydraulic lateral tilt adjustment to facilitate passengers, especially the elderly, wheelchairs and strollers. For the advent of buses with hydraulic tilts, a company based in Kassel, central Germany, designed and applied for a patent for concrete curbs dedicated to bus stops (Editor’s Note: Patents Still Available), a registered trademark of Kassel R. As the first application of this kind of product in Kassel, Germany, it won the unanimous applause from the government and the public. The Kassel curbs soon became popular all over Europe and was also promoted in other countries.