Abstract:
A method of and device for determining the position of a dividing piston (8) in an accumulator (1), the dividing piston (8) being magnetized by at least one magnetizing coil (22), and that the magnetic field of the dividing piston (8) is measured by a sensor coil (24) proximal to the dividing piston (8), the signal from the proximal sensor coil (24) being compared with a signal from a sensor coil (24) located at a distance from the dividing piston (8).
Abstract:
A receiving part (11) having a pressure receiving face (11F) is provided in the through hole (10) of a container body (1), wherein the pressure receiving face has a tapered pressure receiving face (11A) and an outer receiving pressure regulating R face (11B) continuous to the forward end of the tapered pressure receiving face (11A). A supply/discharge tube (13) being inserted into the through hole is provided with a flange part (14) having a pressurizing face (14F) which is provided with a tapered pressurizing face (14A) coming into face contact with the tapered pressure receiving face.
Abstract:
The invention relates to a vehicle braking system comprising a gas hydraulic accumulator (10) with a housing (12), whose interior is divided by metal bellows (16) into a gas-filled gas chamber (20) and a fluid chamber (22). A pressurised fluid can be supplied to and conveyed from said fluid chamber (22) via a supply line (24). A valve assembly (74) is provided between the fluid chamber (22) and the supply line (24), which closes if the pressure in the supply line (24) falls below a minimum value and opens if the pressure exceeds said minimum value. In to order to increase the operating security of the gas hydraulic accumulator (10), the valve assembly (74) closes if the pressure in the supply line (24) exceeds a maximum value and opens if the pressure falls below said maximum value.
Abstract:
The invention relates to a hydropneumatic pressure accumulator, comprising a gas chamber (7), an oil chamber (8) and a pair of metal bellows (9) which separate said chambers. The accumulator has an end plate (11) which is displaced according to volume changes in the gas chamber and oil chamber. Said accumulator is provided with a valve (15) which releases or blocks the flow of hydraulic fluid out of and into the oil chamber (8) and with a valve lifter (23) that controls the valve. During a displacement of the end plate (11), corresponding to a volume expansion in the gas chamber (7) which exceeds a predetermined maximum value, the valve lifter can be displaced by said end plate (11) into a position which blocks the valve (15). Said valve lifter (23) is connected in a fixed manner to the end plate (11) of the metal bellows (9) and the valve (15) can be blocked in two opposing directions by the displacement of the valve lifter (23).
Abstract:
The invention pertains to a hydropneumatic suspension system, in particular for motor vehicles, with at least one hydraulic shock-absorbing strut unit (2) which in its cushioning movements uses an hydraulic medium to impact at least one hydropneumatic piston-type accumulator (6). The piston-type accumulator (6) has a separator piston (22) that separates an hydraulic accumulator (24) from a spring chamber (26) containing a compressible medium, especially a gas. The separator piston (22) is acted upon both by an hydraulic pressure (Ph) coming from the accumulator (24) and a pneumatic pressure (Pp) from the spring chamber (26), and, in addition to the forces (Fh, Fp) resulting from the action of the hydraulic pressure (Ph) and the pneumatic pressure (Pp) on the separator piston (22), at least one additional spring force (FF; FF1; FF2) acts upon the separator piston (22) of the piston-type accumulator (6). This additional spring force is produced by at least one spring element (28; 34; 36) mounted outside the spring chamber (26).
Abstract:
A piston storage device has a piston (13) with two collars (15, 16) separated by a central necked portion (14). A sealing means is arranged in both piston collars. The sealing means facing the gas chamber (18) is designed in such a manner that pressurized gas can enter the gas chamber (18) via a bore (32) through the wall of the housing, via the sealing means which is then adjusted accordingly. When the pressure in the gas chamber is as high as the pressure of the gas supply source, the sealing means returns to its original position, this sealing the gas chamber from the fluid chamber (19).
Abstract:
The pressure vessel comprises an accumulator (10) having a piston (16) disposed in a bore (14). The piston (16) has gas under pressure on one side thereof maintained within the bore (14) by means of a multiple seal in an opening (26) having first (28), second (32), and third diameter (36) sections. The multiple seal includes a fill screw (40) threadedly engaging the second diameter section (32) of the opening (26), the fill screw (40) having a conical surface (46) sealingly engaging a seat (31) between the first diameter (28) and second diameter (32) sections of the opening. A cap screw (70) is threadedly received within the third diameter section (36) and compresses an O-ring (60) between the cap screw (70) and housing (12). The cap screw (70) has an annular rib (77) which bites into a shoulder (34) of the body (12) to provide an additional seal for maintaining the gas under pressure within the bore (14).
Abstract:
The pressure accumulator (10) comprises a cylindrical housing (12) having a bore (14) with a piston received slidably therein. The piston (30) has an H-shaped cross section and includes a reduced diameter portion (34) extending longitudinally along the piston (30), and a sealing device (36, 38) disposed at each end of the reduced diameter portion (34). A cylindrical sleeve (44) is received in the reduced diameter portion (34) such that each end of the sleeve (44) abuts a respective sealing device (36, 38). The housing (12) has an exterior circumferential groove (20) with an 0-ring (26) therein, and a radial opening (22) extending between the circumferential groove (20) and bore (14). Alternatively, the piston (30) may have a longitudinal opening (61) extending from one side of the piston to grooves (63, 64) at the other end (32), the grooves (63, 64) receiving a ring (72) which is subjected to fluid pressure transmitted through the longitudinal opening (61) and expanded radially outwardly against an angled portion (73) of a force-transmitting member (74) which moves longitudinally against seals (76, 77) disposed in one of the grooves (63, 64).