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|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||60/484 ; ; 91/494 ; 269/117|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 3 인용 특허 : 5|
A hydraulic circuit for opening and closing of a folding roof has at least two (pairs of) cylinders, one of which is adapted to open and close the folding roof and the other of which is adapted to lock the roof upon closing. The hydraulic circuit also has electrically operated valves provided in the circuit in such a way that the closing pressure within the roof cylinder is released rapidly as soon as the front roof edge gets within the catching area of the lock member, after which the lock cylinder will immediately close. This prevents the roof from mov...
A hydraulic circuit, comprising at least two double acting piston cylinder devices for opening and closing a folding roof of a cabriolet type vehicle, a reservoir for hydraulic fluid, an electric motor driven hydraulic pump connected with said reservoir, and an electrically operated valve for each of said piston cylinder devices, said valve being connected to the space under the piston of the respective piston cylinder device so as to selectively connect said space either to the pump or to the reservoir, characterized in that the pump is of the type with...