IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0316018
(1999-05-21)
|
우선권정보 |
AU0000882 (1998-05-22) |
발명자
/ 주소 |
|
출원인 / 주소 |
- Hoerbiger Hydraulik GmbH, DEX
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
5 인용 특허 :
12 |
초록
▼
An arrangement for hydraulically operating a rear cover, covering top or the like (1) on a vehicle, with at least one double-acting hydraulic working cylinder (3), which, on the one hand, is connected to the vehicle and, on the other hand, to the covering top wherein its working chambers (8, 9) are
An arrangement for hydraulically operating a rear cover, covering top or the like (1) on a vehicle, with at least one double-acting hydraulic working cylinder (3), which, on the one hand, is connected to the vehicle and, on the other hand, to the covering top wherein its working chambers (8, 9) are in connection with each one side of a switched pressure source (12) via one check valve (10, 11) each, wherein both of the check valves have an mutually releasing device and each of the working chambers parallel with respect to the check valves is kept via a pre-stress valve (15, 16), which steers into the tank, at a specified pressure level. To make possible, in a simple and safe way, an emergency operation of the covering top (1) also in the common working cylinders having different volumes of the working chambers (8, 9) on the side of the piston and valve stem, between at least one working chamber (8, 9) and the corresponding releasable check valve (10, 11), a separate after-suction line (23) enters which leads to the tank (17) and in which a check valve (24) is inserted which is open in the direction of the working chamber (8).
대표청구항
▼
[ What is claimed is:] [1.]1. A hydraulic assembly for moving a movable part of a vehicle relative to the vehicle, said hydraulic assembly comprising:a working cylinder which is connected between the movable part and the vehicle includes a cylinder and a piston having a rod, said piston being movabl
[ What is claimed is:] [1.]1. A hydraulic assembly for moving a movable part of a vehicle relative to the vehicle, said hydraulic assembly comprising:a working cylinder which is connected between the movable part and the vehicle includes a cylinder and a piston having a rod, said piston being movable within the cylinder so as to define a piston chamber and a rod chamber within said cylinder, anda hydraulic system connected to said working cylinder, said hydraulic system comprising:a tank for containing hydraulic medium,a first hydraulic line connected between said piston chamber and said tank, said first hydraulic line containing a first check valve,a second hydraulic line connected between said rod chamber and said tank, said second hydraulic line containing a second check valve,release means connected to said first and second check valves for mutual release,a third hydraulic line connected to said first hydraulic line at a location between said piston chamber and said first check valve and extending to said tank, said third hydraulic line containing a first pre-stress valve,a fourth hydraulic line connected to said second hydraulic line at a location between said rod chamber and said second check valve and extending to said tank, said fourth hydraulic line containing a second pre-stress valve,a switchable hydraulic pressure means connected to both said first and second hydraulic lines between said respective first and second check valves and said tank, anda fifth hydraulic line connected to one of said first and second hydraulic lines, said fifth hydraulic line including a one-way check valve which allows hydraulic medium to be suctioned therethrough from said tank to said working cylinder.
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