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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||248/417 ; 248/162.1 ; 248/188.2|
|발명자 / 주소||
|출원인 / 주소||
|인용정보||피인용 횟수 : 7 인용 특허 : 1|
An auto-returning height control assembly comprising a spindle which is inserted in an outer cylinder and one end is fixed to an end of the outer cylinder, and a first and second cam member which are inserted between the outer cylinder and a sleeve member so that the spindle can rotates about its longitudinal axis and returns; its original place at the same time. At least one projection is formed on the sleeve member and the first cam member is fixed at the inside cylindrical surface of the outer cylinder. A projection is formed on the second cam member ...
[ What is claimed is:] [1.]1. An auto-returning height control assembly in which an outer cylinder and a spindle are included and the spindle is projected outwards inside the outer cylinder comprises;a sleeve member which covers and fixes an outer cylindrical surface of the spindle and in which more than one projection is formed along the direction of its axis;a first cam member which allows the sleeve member in which the grooves are formed to rotate about its logitudinal axis and in which an side is in slope and combined to an inside cylindrical surface...