# US 7,743,694 B2 · Axial piston machine

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- Number: US 7,743,694 B2
- Document ID: US7743694B2
- Status: Granted
- Kind: B2
- Application number: 11/791,202
- Filed: 2005-11-09
- Published: 2008-02-07
- Granted: 2010-06-29
- Earliest claimed: 2004-11-20
- Assignees: Lik Fahrzeug-Hydraulik GmbH & Co. KG
- Inventors: Uwe Becker
- Web page: https://patentgrep.com/patent/US7743694B2

## CPC

- F04B 27/1063: {Actuating-element bearing means or driving-axis bearing means}
- F04B 39/0044: {with vibration damping supports}
- F16C 27/066: {Ball or roller bearings}
- F16C 27/08: primarily for axial load, e.g. for vertically-arranged shafts
- F05C 2225/02: Rubber
- F16C 17/04: for axial load only
- F04B: POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS (machines for liquids, or pumps, of rotary-piston or oscillating-piston type F04C; non-positive-displacement pumps F04D; pumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped F04F)
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F05C: INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES

## Abstract

An axial piston machine, in particular to an air-conditioning compressor for motor vehicles, including a drive unit for taking-in and compressing a pressure medium The drive unit is rotatably driven by a shaft, the rotatable movement of the shaft is convertible into the reciprocating motion of the pistons in the drive unit and the shaft is mounted in the casing of the axial piston machine, in particular by an axial bearing.

## Claims

### Claim 1

An axial piston machine comprising:
a casing;
pistons;
a drive, the drive drawing in and compressing a pressurizing agent;
an axial bearing having a contact face in the casing;
a shaft, the shaft being supported by the axial bearing;
the drive being rotary driven by the shaft, the rotary motion of the shaft converted in the drive to a reciprocating motion of the pistons;
a damping element, including an elastomer-coated metal washer situated between a rolling element of the axial bearing and the contact face; and
an articulated bearing support between the shaft and axial bearing.

### Claim 2 (depends on 1)

The axial piston machine as recited in claim 1 wherein the machine is an air-conditioning compressor for motor vehicles.

### Claim 3 (depends on 1)

The axial piston machine as recited in claim 1 wherein the articulated bearing support has a first washer having an axially projecting conical rim and a second washer, having a conically beveled edge on the outer circumference, the axially projecting conical rim of the first washer bearing on the conically beveled edge of the second washer in such a way that contact between the first and the second washers occurs only between the two cones, and otherwise an axial intermediate space is formed between the first and second washers.

### Claim 4 (depends on 1)

The axial piston machine as recited in claim 1 wherein the elastomer-coated metal washer is a rubberized metal sheet.

### Claim 5 (depends on 4)

The axial piston machine as recited in claim 4 wherein the metal sheet is coated with rubber on both sides.

### Claim 6 (depends on 4)

The axial piston machine as recited in claim 4 further comprising a second rubberized metal sheet washer situated in a sandwich construction with the rubberized metal sheet.

### Claim 7 (depends on 5)

The axial piston machine as recited in claim 5 wherein the metal sheet is provided with different rubber coating thickness on each side of the metal sheet.