Abstract

The invention relates to a hydropneumatic accumulator (1), comprising: - an enclosure (2) formed by a first half-shell (3) and a second half-shell (4) that are screwed to one another by means of a first thread (6) and a second thread (8) arranged on the first half-shell and on the second half-shell, respectively; and - a membrane that is pinched between the first half-shell (3) and the second half-shell (4); the first thread (6) and the second thread (8) have the following characteristics: - a pitch P; - an angle α formed by the engagement flank (22), which is between 15° and 35°; - an angle β formed by the load-bearing flank (23), which is between 5° and 10°; - a radius of curvature R of the root (25), which is between 0.15 P and 0.25 P; - a width L, which is between 0.20 P and 0.40 P; and - a distance D1, which is greater than or equal to the sum of the height H and of the radius of curvature R.

IPC Classes  ?

• F15B 1/10 - Accumulators using a gas cushionGas charging devicesIndicators or floats therefor with flexible separating means
• F15B 1/12 - Accumulators using a gas cushionGas charging devicesIndicators or floats therefor with flexible separating means attached at their periphery
• F16B 33/02 - Shape of threadSpecial thread-forms
• F16B 31/06 - Screwed connections specially modified in view of tensile loadBreak-bolts having regard to possibility of fatigue rupture

Abstract

Hydraulic rotating machine with pistons, comprising: a casing (102); an inclined plate (130) mounted in the casing; a drive shaft (100) and a barrel (104) which are mounted in the casing; a plurality of pistons (106) which are situated in bores formed in the barrel, the plurality of pistons bearing at a first end against the inclined plate; and a delivery head (110) against which the barrel bears opposite the inclined plate. The delivery of the hydraulic rotating machine is ensured by the delivery head, the delivery head comprising two crescent ports permitting the aspiration and the delivery of a liquid in the hydraulic rotating machine. The delivery head (110) is a cast iron component comprising a surface on which a coating of soft metal (111) has been deposited, the coating of soft metal being in contact with the barrel (104). The soft metal is a non-ferrous metal alloy comprising at least 51% copper relative to the total weight of the non-ferrous metal alloy. The thickness of the coating of soft metal (111) is between 0.5 and 3.5 mm. A method for preparing the two-material delivery head (110) is also proposed.

IPC Classes  ?

• F04B 1/2042 - Valves
• F04B 1/2021 - Details or component parts characterised by the contact area between cylinder barrel and valve plate
• F03C 1/06 - Reciprocating-piston liquid engines with multiple cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
• F03C 1/34 - Distribution members specially adapted for multiple-cylinder engines
• F01B 3/00 - Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis

Abstract

The invention relates to a hydraulic pump wherein a barrel is in sliding connection with a shaft and is driven in rotation by the shaft. A housing is formed in the barrel, the shaft sliding in the housing while projecting from the front face of the barrel. The housing and the shaft defining between them a balancing chamber, the balancing chamber being connected to a delivery aperture in such a way that fluid in the balancing chamber exerts a compressive force on the barrel which tends to press the barrel against a port plate.

IPC Classes  ?

• F04B 1/2007 - Arrangements for pressing the cylinder barrel against the valve plate, e.g. by fluid pressure
• F04B 1/2071 - Bearings for cylinder barrels
• F04B 1/2021 - Details or component parts characterised by the contact area between cylinder barrel and valve plate
• F04B 1/2078 - Swash plates

Abstract

The invention concerns a hydraulic control system (1) comprising a plurality of hydraulic cylinders (A, B) intended to be actuated in a synchronised manner, each hydraulic cylinder comprising a barrel having an internal space and a piston (3a, 3b) dividing the internal space of the barrel into a first chamber (4a, 4b) and a second chamber (5a, 5b), a volume flow rate divider/multiplexer (10) having a common port and a plurality of parallel ports (12a, 12b), a plurality of control lines (6a, 6b) each linking a respective parallel port to the first chamber of a respective hydraulic cylinder, and a hydraulic locking device (30) comprising a first supply-side port (31a) intended to be connected to a pressure source, a connecting channel connecting the first supply-side port to the common port (11), and a non-return member arranged in the connecting channel and having a throughflow direction from the first supply-side port towards the common port.

IPC Classes  ?

• F15B 11/22 - Synchronisation of the movement of two or more servomotors

Abstract

A hydraulic depth-control device for a submersible body comprises: a variable-volume ballast space, a pressure accumulator comprising a hydraulic chamber and a gas chamber, which chambers are separated by a deformable or mobile wall, the gas chamber containing a gas at an absolute pressure higher than atmospheric pressure, a hydraulic pump coupled to an electric motor, the hydraulic pump having a suction inlet connected to the ballast space and a delivery outlet connected to the hydraulic chamber of the pressure accumulator, a return hydraulic circuit connecting the hydraulic chamber of the pressure accumulator to the ballast space via an electrically operated valve, and a hydraulic fluid arranged in the ballast space, the hydraulic pump, the hydraulic chamber of the pressure accumulator and the return hydraulic circuit.

IPC Classes  ?

• B63B 22/20 - Ballast means

Abstract

The invention relates to a hydraulic device (10) for controlling the depth of an immersible object, which comprises: a variable-volume ballasting chamber (11); a pressure accumulator (5) comprising a hydraulic chamber and a gas chamber which are separated by a deformable or mobile wall, the gas chamber containing a gas under an absolute pressure greater than atmospheric pressure; a hydraulic pump (14) coupled with an electric motor (15), the hydraulic pump having a suction inlet connected to the ballasting chamber (11), and a delivery outlet connected to the hydraulic chamber of the pressure accumulator; a hydraulic return circuit (19) connecting the hydraulic chamber of the pressure accumulator to the ballasting chamber via a solenoid valve (18); and a hydraulic fluid provided in the ballasting chamber, the hydraulic pump, the hydraulic chamber of the pressure accumulator, and the hydraulic return circuit.

IPC Classes  ?

• B63B 22/20 - Ballast means

Abstract

A hydraulic pump with double direction of rotation comprises axial pistons bearing against a swash plate, the pump comprising a cylinder head comprising two chambers intended to be connected respectively to a high-pressure circuit and to a low-pressure circuit. The port plate (3) produced in the form of a planar plate arranged between the rotating drum and the cylinder head has two identical openings (22, 23) passing through the thickness of the planar plate. The port plate pivots about an axis (21) in such a way as to be able to occupy two angular positions depending on the direction of rotation of the pump. The pump comprises a device (38, 39) for hydraulically controlling the angular position of the port plate, capable of automatically causing a change in the angular position of the port plate, when the direction of rotation of the pump is reversed, under the effect of the pressure differential between the two chambers of the cylinder head.

IPC Classes  ?

• F04B 1/20 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
• F04B 1/30 - Control of machines or pumps with rotary cylinder blocks
• F04B 1/32 - Control of machines or pumps with rotary cylinder blocks by varying the relative positions of a swash plate and a cylinder block
• F03C 1/06 - Reciprocating-piston liquid engines with multiple cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
• F03C 1/34 - Distribution members specially adapted for multiple-cylinder engines
• F03C 1/40 - Control specially adapted therefor

Abstract

The invention relates to a hydraulic motor (1) that can be actuated in both directions, the hydraulic motor comprising two bidirectional hydraulic ports (A, B), each of which can be connected, selectively depending on the direction of rotation in which the motor is to be actuated, either to a source of liquid under pressure or to a device for collecting the liquid at a lower pressure, the hydraulic motor comprising a drainage orifice (5) communicating with an interior of the casing of the motor, characterized in that it comprises: an intermediate line (2) into which the drainage line (5) of the casing opens; a first non-return valve (3) disposed between the intermediate line (2) and a first bidirectional hydraulic port (A) and able to open in the direction of the first bidirectional hydraulic port; and a second non-return valve (4) disposed between the intermediate line (2) and a second bidirectional hydraulic port (B) and able to open in the direction of the second bidirectional hydraulic port.

IPC Classes  ?

• F03C 1/14 - Distributing valve-gear peculiar thereto actuated by the driving liquid of the engine
• F04B 1/20 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
• F03C 1/04 - Reciprocating-piston liquid engines with multiple cylinders, characterised by the number or arrangement of cylinders with cylinders in star- or fan-arrangement

Goods & Services

Motors and engines, especially hydraulic motors and engines such as electro-hydraulic groups, moto-hydraulic groups, electro- or moto-hydraulic assemblies incorporating electrical or electronic controls as well as sensors; hydraulic couplings; hydraulic drive components; hydraulic equipment and components such as pumps, jacks, accumulators, receivers, feeders and pressure regulators.

Goods & Services

Motors, namely, hydraulic engines for construction and agricultural and transportation machines, for hydraulic stations, for drilling tools for oil searches, for marine and aeronautical machines and equipments; hydraulic equipments and components, namely, hydraulic pumps, hydraulic jacks, hydropneumatic and hydraulic accumulators, namely, two-half shells forming a cavity with a diaphragm positioned within the cavity for minimizing pressure variations of hydraulic fluid, pressure driven parts, namely, hydraulic pressure regulators being parts of machines, hydraulic sensors in the nature of sensors for monitoring, controlling and switching hydraulic or pneumatic systems being sold as a unit with manufacturing machines, hydraulic valves, hydraulic mechanical seals [, hydraulic filters, in the nature of filters for engines and oil tanks being vehicle engine parts, hand-held battery actuated hydraulic crimp tools ]