| 摘要 |
PCT No. PCT/SE84/00054 Sec. 371 Date Oct. 16, 1984 Sec. 102(e) Date Oct. 16, 1984 PCT Filed Feb. 14, 1984 PCT Pub. No. WO84/03263 PCT Pub. Date Aug. 30, 1984.Devices for preventing the theft of vehicles and trailers are known, of which vehicles and trailers the decelerating brakes and parking brake consist of brakes operated with compressed air. The device comprises a valve controlled by a code lock. In order to double the safety against manipulation of the locking device, the valve consists of a three-way valve (14) with one inlet port and two outlet ports (16,17), which valve (14) is inserted in the feed line (11) between a pressure medium source (4) for actuating the parking brake and the control valve (12) for the parking brake, with the inlet port connected to the pressure medium source (4). One outlet port (16) is connected to the control valve (12), and the second outlet port (17) is connected to the decelerating brake circuit for either wheel pair (1) via a first check valve (19). The feed line (9) from the foot-operated decelerating brake valve (6) comprises a second check valve (21), and the valve body (23) of the three-way valve (14) by the locked position of the code lock (15) is held in the position, which closes the connection between the inlet port and said firstmentioned outlet port (16), but holds the connection open between the inlet port and said second outlet port (17), and vice versa in open position of the code lock, and the line (18) between the three-way valve (14) and the first check valve (19) is relieved of pressure when the code lock assumes open position. |
