US 9,512,859 B2Granted

Hydraulic transmission circuit with multiple capacities

AssigneePoclain Hydraulics Industrie

InventorsClement Recoura, Guillaume Charrier

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Abstract

A hydraulic transmission circuit comprising three or four coupled hydraulic elementary motors, each elementary motor having a first and a second secondary enclosure. The circuit includes four distribution valves for which the respective outlet channels may be selectively connected to two main conduits for supplying fluid to and discharging fluid from the circuit. The outlet channels of the first and second valves are connected to at least one of the first secondary enclosures; those of the third and fourth valves are connected to at least one of the second secondary enclosures. Each of the elementary motors has a first secondary enclosure connected to a single valve from among the first or second valve and a second secondary enclosure connected to a single valve from among the third or fourth valve. The valve pairs thereby connected to said elementary motors respectively, are all distinct, two by two.

Claims16

Dependent claims

A hydraulic transmission circuit comprising:

two main conduits, respectively for supplying fluid and for discharging fluid;
exactly three hydraulic elementary motors associated for a same drive;
each of said elementary motors having a first secondary enclosure for supplying fluid and a second secondary enclosure for discharging fluid;
said motors delivering output torques in the same direction when they are fed via their first respective secondary enclosures;
a first, a second, a third and a fourth distribution valve;
wherein:
each of said distribution valves has an outlet channel and two inlet channels, and is capable of selectively connecting the outlet channel with selectively either one of said inlet channels;
said two inlet channels of said distribution valves are connected to said two main conduits respectively;
each of the elementary motors is exclusively connected to a pair of valves formed by the valve from among the first and second distribution valve to which the first secondary enclosure of the relevant motor is connected, and the valve from among the third or fourth distribution valve to which the second secondary enclosure of the relevant motor is connected;
each of the pairs of valves associated with each of the elementary motors is a unique combination of the first, the second, the third, and the fourth distribution valves;
and
said outlet channels of said first, second, third and fourth distribution valves are respectively connected:
to the first secondary enclosures of the first and second elementary motors;
to the first secondary enclosure of the third elementary motor;
to the second secondary enclosure of the first elementary motor;
to the second secondary enclosures of the second and third elementary motors.

13 more elements

A hydraulic transmission circuit comprising:

two main conduits, respectively for supplying fluid and for discharging fluid;
exactly four hydraulic elementary motors associated for a same drive;
each of said elementary motors having a first secondary enclosure for supplying fluid and a second secondary enclosure for discharging fluid;
said motors delivering output torques in the same direction when they are fed via their first respective secondary enclosures;
a first, a second, a third and a fourth distribution valve;
wherein:
each of said distribution valves has an outlet channel and two inlet channels, and is capable of selectively connecting the outlet channel with selectively either one of said inlet channels;
said two inlet channels of said distribution valves are connected to said two main conduits respectively;
each of the elementary motors is exclusively connected to a pair of valves formed by the valve from among the first and second distribution valve to which the first secondary enclosure of the relevant motor is connected, and the valve from among the third or fourth distribution valve to which the second secondary enclosure of the relevant motor is connected;
each of the pairs of valves associated with each of the elementary motors is a unique combination of the first, the second, the third, and the fourth distribution valves;
and said outlet channels of said first, second, third and fourth distribution valves are respectively connected:
to the first secondary enclosures of the first and second elementary motors;
to the first secondary enclosures of the third and fourth elementary motors;
to the second secondary enclosures of the first and fourth elementary motors;
to the second secondary enclosures of the second and third elementary motors.

12 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/742,511Filed 16 Jan 2013
Priority: FR 12 5048118 Jan 2012
Published: US 2013/0180237 A118 Jul 2013
Granted: 6 Dec 2016
Term ends: Not estimatedThe source records don’t support an estimate.

Classification24 codes

F15B 7/008
Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors: with rotary output
F03C 1/045
Controlling: by using a valve in a system with several pump or motor chambers, wherein the flow path through the chambers can be changed, e.g.…
F03C 1/047
With cylinders in star or fan arrangement: the pistons co-operating with an actuated element at the outer ends of the cylinders
F03C 1/247
In which the liquid exclusively displaces one or more pistons reciprocating in rotary cylinders: with cylinders in star- or fan-arrangement , the…