|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||277/24 ; 277/165 ; 277/170|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 5 인용 특허 : 0|
An annular seal for pistons and piston rods of cylinder-type actuators, especially hydraulic actuators, where a first sealing ring of highly elastic material is received inside an annular groove in such a way that a sharp edge of the ring exerts an elevated contact pressure against a cooperating sliding surface which creates dry friction and which shears and smoothens a dry lubricant coating on the sliding surface which has previously been deposited there by a second, plastically yielding sealing ring received inside the same annular groove.