EP 1466093 A1 20041013 - HYDRAULIC RADIAL PISTON MOTOR
Title (en)
HYDRAULIC RADIAL PISTON MOTOR
Title (de)
RADIALKOLBENHYDRAULIKMOTOR
Title (fr)
MOTEUR HYDRAULIQUE A PISTONS RADIAUX
Publication
Application
Priority
- FR 0204491 W 20021220
- FR 0116817 A 20011224
Abstract (en)
[origin: FR2834012A1] The invention concerns a hydraulic radial piston motor comprising a cam, a cylinder block and a distributor. The cylinders of the cylinder block are connected to communication orifices (32A) located in a communication surface of the cylinder block, while the distributor has a distribution surface wherein are provided communication orifices (21A, 23A) adapted to communicate with the communication orifices to drive the motor in rotation. The cam has several lobes (50, 50') each having two ramps (51, 52), each ramp corresponding to a distribution orifice (21A, 23A). The edges of some communication orifices (32A) have each at least a recess (54A, 54B) designed to provide a small communication cross-section with a distribution orifice. The invention is particularly applicable to hydraulic radial piston motors for which the ratio between the number of cylinders and the number of cam lobes is close to 1.
[origin: FR2834012A1] The hydraulic motor comprises a cam and a cylinder block that rotate relative to one another, the cylinder block having radial cylinders connected by ducts to communication ports (32A, 32'A, 32A) in its communication face. The cylinders contain sliding pistons that interact with the cam, which has a series of lobes with inclined surfaces (50, 50'). The motor also has a distributor with distribution ports (21A, 23A) that link in sequence with the communication ports as the cylinder block and distributor rotate relative to one another, and the edges of at least some of the communication ports have notches (54A, 54B) to establish a small communication with the distribution ports.
IPC 1-7
IPC 8 full level
F03C 1/047 (2006.01); F03C 1/38 (2006.01); F03C 1/40 (2006.01)
CPC (source: EP US)
F03C 1/0444 (2013.01 - EP US); F03C 1/045 (2013.01 - EP US)
Citation (search report)
See references of WO 03056171A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR
DOCDB simple family (publication)
FR 2834012 A1 20030627; FR 2834012 B1 20040319; AU 2002364862 A1 20030715; DE 60220099 D1 20070621; DE 60220099 T2 20080110; EP 1466093 A1 20041013; EP 1466093 B1 20070509; JP 2005513350 A 20050512; JP 4209330 B2 20090114; US 2005120874 A1 20050609; US 7185579 B2 20070306; WO 03056171 A1 20030710
DOCDB simple family (application)
FR 0116817 A 20011224; AU 2002364862 A 20021220; DE 60220099 T 20021220; EP 02801160 A 20021220; FR 0204491 W 20021220; JP 2003556666 A 20021220; US 49994704 A 20040623