Poclain Hydraulics Industrie

Valeo Corporation

Messier-bugatti Inc.

Philippe Raymond Lucienne

Jean Heren

Andre Prigent

Benjamin Basson

Bernard R Allart

Julien Viard

André Prigent

Jean-Philippe Raisin

Jean-Claude Bochot

Jean-Marie Rouillard

Cyrille D'Hersignerie

Jean-Claude Cousin

Gery Depierre

Christophe Gouzou

Christophe Tardiveau

Eric Gest

Albert De Pindray

Serge Scampucci

Terence Herbert Collins

Clément Recoura

Hervé Desumeur

Cécile Borgnon

Viktor Kuban

Bohdan Hornacek

A hydraulic apparatus including a machine shaft having a proximal end and a distal end, adapted to drive a cylinder block. A clutch having a clutch shaft having a proximal end and a distal end, and a plurality of friction discs linked to the distal end of the clutch shaft and a plurality of friction discs linked to the proximal end of the machine shaft for selectively engaging the clutch shaft with the machine shaft. The friction discs are disposed radially around the machine shaft. The distal end of the clutch shaft is bell-shaped so as to surround the proximal end of the machine shaft. The bell shape defines an inner space where the proximal end of the machine shaft and the friction discs linked to the clutch shaft are located.

Hydraulic apparatus comprising an improved assembly of a hydraulic machine and a clutch

The present invention relates to a subassembly for forming a hydraulic motor after assembly onto an assembly including a shaft, said subassembly including a cover forming a housing element, a multilobe cam, a cylinder block opposite the cam, pistons guided so as to slide radially within the respective cylinders of the cylinder block and bearing on the lobes of the cam, and a valve intended to apply pressurized fluid to said pistons in series, wherein said subassembly includes means for temporarily attaching the cylinder block to the cover and means for accessing an element of the valve through the cover in order to enable, during installation, the angular positioning of said element with respect to the shaft, followed by the attachment thereof to the shaft. The present invention also relates to a method for assembling such a hydrobase.

Subassembly forming a hydrobase for hydraulic motors, and assembly method

Hydraulic transmission apparatus including a pressurized fluid source and at least one hydraulic motor fed by said pressurized fluid source. The motor has two motor ducts for feed/discharge, and one casing duct. The motor can be operated in assisted mode, in which it generates torque or in unassisted mode in which it does not generate any torque and its pistons are maintained in the retracted position under the effect of the pressure in the casing duct. The apparatus further includes an accumulator suitable for feeding: This apparatus thus enables the motor to be positively clutched/declutched quickly.

Hydraulic transmission apparatus making quick positive clutching/declutching possible

A hydraulic transmission system for a vehicle is provided. The system includes a main pump serving to feed with fluid at least one hydraulic motor for driving a vehicle mover member; an auxiliary pump, the main pump and the auxiliary pump being suitable for being actuated jointly; and a 'bypass' connection between a delivery orifice of the auxiliary pump and an unpressurized reservoir. In addition, a first constriction is arranged on the bypass connection, and configured to maintain a pump protection pressure in a pump protection portion of the bypass connection. This pressure is applied to the main orifices of the main pump when said pump is actuated but is not delivering, thereby ensuring that the pump is protected.

Hydraulic transmission system having a main pump that can be actuated continuously

A hydrostatic transmission including a main pump, two main ducts serving respectfully as feed and as discharge for first and second hydraulic motors that serve to drive disposed one after the other. A bypass valve can take up a reduced-speed position in which the feed main orifices are connected to the discharge main duct, and an increased-speed position in which one of the motors is bypassed, the feed main orifice of the motor being connected to the discharge main duct via a bypass link, while the other main orifices continue to have their respective links. The apparatus further includes a constriction suitable for being activated to restrict the flow of fluid through the bypass link.

Hydrostatic transmission device for a heavy vehicle

An open hydraulic circuit comprising a main pump (P), a hydraulic motor (M), two main ducts () constituting a feed main duct and a discharge main duct and connected to the pump or to a reservoir (R) via a feed selector (). The circuit further comprises a multifunction valve device comprising a multifunction selector () for connecting the main duct that is at the higher pressure to a pressure limiter () and for connecting the main duct that is at the lower pressure to booster means (), and for interconnecting the main ducts by connecting them to the pressure limiter when the pressures in the main ducts are substantially mutually equal.

Hydraulic circuit having a multifunction selector

The circuit comprises a main hydraulic pump (), two main ducts (), a booster pump (), a hydraulic motor () which comprises two elementary motors () for driving a first displacement member (), and a second hydraulic motor () for driving a second displacement member (). The second elementary motor () is in parallel with the second main motor () while the first elementary motor () and the second main motor () are connected to a feed or discharge additional duct, e.g. via a series link between them. The booster pump () is connected to the additional duct, e.g. an interconnection duct () for interconnecting the first elementary motor () and the second main motor (). A replenishing valve () is suitable for connecting one of the main ducts to a pressure-free reservoir () and the circuit further comprises means () for preventing said replenishing link from being established on detecting a condition that reveals a spin situation.

Hydrostatic transmission circuit with replenishing for a vehicle

A braking system comprises one or more brake cylinders () each associated with one or more wheels, a fluid supply (), and a brake control () for commanding the feeding of fluid to the cylinder or cylinders via one or more brake valves and one or more brake pipes (). The system also comprises a function selector () adapted to adopt an antislip mode position (A) or antilock mode positions in which it connects a branch pipe () to a fluid feed pipe () or to a return line () and a control valve () for the or each brake cylinder adapted to adopt a normal braking position (A,A,A,A) to connect the cylinder to the brake pipe () and one or more special mode positions (B,B,B,B) to connect the cylinder to the branch pipe () that the function selector connects to the return line or to the feed. The system further comprises means (, UC) for detecting wheelspin or a wheel tending to lock and for commanding the function selector () and the control valve associated with the brake cylinder associated with that wheel accordingly.

Motor vehicle wheel antiskid and antilock device using the braking circuit

The vehicle has two groups of displacement members (), one of which groups is steerable. The apparatus comprises a closed transmission circuit which includes a pump () and hydraulic motors (). A first group of motors that serves to drive two displacement members on the same axle comprises at least two double motors (), each having two operating cubic capacities forming two elementary motors (). The first elementary motor () of each of the double motors is connected to the pump () in parallel with a motor () of the other group, while the second elementary motor () is connected in series with said motor of the other group. There thus exist first and second series ducts (C, C) between the motors. The series ducts are connected to a low-pressure circuit via means () for limiting the pressure in the series ducts (C, C), and the apparatus further comprises means (R, R, R) for limiting the flow rate of fluid flowing between the series ducts and the low-pressure circuit.

Hydrostatic transmission device of a mobile machine

A double damped flywheel for a motor vehicle comprises a first mass having a central hub, a second mass, a torsion damper, and a friction device working axially between the first mass and the second mass and having at least one friction ring in contact with a friction surface. The friction ring and the associated friction surface are carried by a support cage which is fitted on a local portion, having an increased radius, of the central hub, this cage being located axially by a transverse thrust plate of the first mass, so that the cage is located between this thrust plate and the anti-friction bearing by which the second mass is mounted on the first mass.

Double damped flywheel having friction device for ease of assembly and

Damped flywheel, with a plain bearing especially for a motor vehicle

Double damped flywheel, especially for a motor vehicle

A damped flywheel, in particular for a motor vehicle in conjunction with the clutch of the vehicle, comprises two coaxial masses which are mounted for rotational displacement of one with respect to the other. One of the masses includes a centring nose which projects axially and penetrates into a central opening of the other mass. An amorphous diamond carbon coating is provided between the centring nose and the central opening, so that one of the rotating masses is mounted on the other through this coating.

Damped flywheel, especially for a motor vehicle

The invention relates to a force-limiting device for aircraft landing gear shock absorbers, in particular for helicopters, and also to a shock absorber fitted with such a device. According to the invention, a box 201 is provided that forms a partition in the main body 101 of the shock absorber, the box having a bottom 202 whose central portion has a diaphragm 210 with small throttling orifices 211 and force-limiting members also being provided comprising firstly an annular valve member 225 disposed around the diaphragm 210 such that when open it allows a large volume of hydraulic fluid to pass through the box in a very short time, and a resilient return member 226 holding the annular valve member 225 in its closed position, but allowing the valve member to open above a predetermined threshold.

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Verberie, France

Philippe Raymond Lucienne