HYDROPNEUMATIC AXIAL PISTON MACHINE - LIEBHERR MACHINES BULLE SA

Title:

HYDROPNEUMATIC AXIAL PISTON MACHINE

Document Type and Number:

Japanese Patent JP2002070716

Kind Code:

A

Abstract:

To provide an axial piston machine, in which a sharp increase or decrease of the pressure in a cylinder can be avoided by a simple and secure method even when the operational status of the cylinder changes upon passing of a cylinder opening over a reverse area.

The axial piston machine is provided with a control body 1, which comprises a low-pressure side substantially circular arc-shaped control opening 3, a high-pressure side substantially circular arc-shaped control opening 2, and a hole 4 and 5 provided in the reverse areas located between both the above openings. In adjusting the hole 4 and 5 in the reverse areas, which affect pressure increase and decrease upon passing of the cylinder opening over the reverse areas, according to the operational status, the hole 5 in at least one of reverse areas on the control body is connected to the high pressure side or the high pressure side control opening 2 via a conduit, on which a variable throttle is provided, which is controlled by high pressure and opens a throttle opening corresponding to the high pressure in the conduit.

Inventors:

RIEDHAMMER JOSEF
ECKHARDT ERICH
SCHWEDE FRANZ-JOSEF

Application Number:

JP2001218281A

Publication Date:

March 08, 2002

Filing Date:

July 18, 2001

Export Citation:

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Assignee:

LIEBHERR MACHINES BULLE SA

International Classes:

F03C1/38; F03C1/40; F04B1/20; (IPC1-7): F03C1/38; F03C1/40

Domestic Patent References:

JPH10331996A	1998-12-15
JPH07332225A	1995-12-22
JPS60162081A	1985-08-23
JPS63159676A	1988-07-02
JPS6085267A	1985-05-14
JPH05321815A	1993-12-07
JPH07180654A	1995-07-18

Foreign References:

EP0935069A2

1999-08-11

Attorney, Agent or Firm:

Hiroshi Maeda (7 outside)

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