|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||280/005.2 ; 280/005.26 ; 280/033.994|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 2 인용 특허 : 11|
The present invention configures a pushcart, in particular a baggage cart such as is used in airports, for ease of maneuverability in negotiating an escalator stairway. The cart is fitted with a front wheel assembly and pivotable rear wheel assemblies, as well as with drop-attenuating mechanisms fitted to each wheel assembly. The rear wheel assemblies each include a reverse-releasable, pivoting-lock mechanism. The drop attenuating mechanisms function when the pivotable wheel assemblies are locked in the pushcart advancing direction, and include damped-sw...
[ What is claimed is:] [1.]1. A pushcart for negotiating an escalator stairway of specification slope and step tread length, the pushcart comprising:a cart body;a plurality of wheel assemblies carrying wheels for running the pushcart on generally level surfaces, wherein at least two of said wheel assemblies each includesa fixed member fastened to said cart body;a pivotable wheel mount holding a wheel;a swivel joining a horizontal part of said wheel mount to said fixed member such that said wheel mount is pivotable against said fixed member about a vertic...