David F. MACNEIL,Frederick W. MASANEK, JR.,David S. IVERSON
申请号：
US15686928
公开号：
US20170347622A1
申请日:
2017.08.25
申请国别(地区):
US
年份:
2017
代理人:
摘要：
A pet ramp system has a central pier and at least one ramp with an axle that is received in at least one axle receiver disposed near the top of the pier. The piers axle receiver(s) permit installation of the ramp axle when the ramp is oriented at less than a predetermined angle from vertical, but the axle receiver(s) will not permit separation of the ramp from the pier when the ramp is lowered to any of a plurality of use positions that each are at more than the predetermined angle.
