|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||116/63C ; 404/10|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 17 인용 특허 : 5|
A collapsible marker cone for use with sporting events, such as in-line skating, comprising a base and a conical portion. The conical portion is attached to the base along a vertical axis and includes weakened regions such as vertically disposed slots which allow the conical portion to easily collapse, along the vertical axis, when a predetermined force, such as the weight of a falling person, is applied to the marker cone along the vertical axis. The weakened regions allow the conical portion to collapse prior to injuring the falling person.
A marker cone comprising: a unitary conical portion including a tip end spaced from a base end and including selectively weakened regions, said weakened regions allowing said conical portion to collapse along a vertical axis of said conical portion in response to a predetermined force being applied to said conical portion along said vertical axis, said weakened regions including slots extending substantially from said base end to said tip end, said slots including adjacent slots wherein a distance of said conical portion between said adjacent slots is sm...