|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||16/33 ; 16/42R ; 190/18A ; 280/37|
|발명자 / 주소|
|인용정보||피인용 횟수 : 21 인용 특허 : 1|
A rotatable roller assembly includes a roller, a housing, a support pivotably connected at one end to the housing for pivotal movement between a first retracted position and a second extended position, the roller being rotatably connected to the other end of the support, first and second notches defined in the support for establishing the first and second positions, respectively, and a locking mechanism slideably movable into and out of locking engagement with the first and second notches to effect releasable locking of the support and thus the roller in...
A retractable roller assembly comprising in combination: a roller; a housing for said roller; roller support means having one end pivotably connected to said housing and means mounting said roller for rotatable movement to the other end of said roller support means, said roller support means being pivotable between a first retracted position wherein said roller is housed within said housing and a second extended position wherein said roller is extended at least partially beyond said housing for rolling engagement with a surface; first means defining a fi...