# US 7,611,285 B2 · Linear ball bearing

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- Number: US 7,611,285 B2
- Document ID: US7611285B2
- Status: Granted
- Kind: B2
- Application number: 10/552,341
- Filed: 2004-03-26
- Published: 2006-09-21
- Granted: 2009-11-03
- Earliest claimed: 2003-04-11
- Assignees: INA-Schaeffler KG
- Inventors: Dietmar Rudy; Ralf Moseberg; Michael Heid; Patrick Daniel; Wolfgang Bauer
- Web page: https://patentgrep.com/patent/US7611285B2

## CPC

- F16C 33/41: comb-shaped
- F16C 29/0659: {with four rows of balls}
- F16C 33/3818: {formed of unconnected segments}
- F16C 33/40: for multiple rows of balls
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS

## Abstract

A linear ball bearing having a guide carriage (2) which is guided on a guide rail (1) in a longitudinally displaceable manner and is mounted in rolling contact on longitudinal sides of the guide rail (1) via balls (3) which are arranged on each longitudinal side in at least two parallel ball rows (4, 5) encircling in endless ball channels (6), each ball (3) of the one ball row (5) together with an adjacent ball (3) of the other ball row (4) being held all round in cage pockets (8) of a common cage piece (7), the cage piece (7) having exactly two cage pockets (8) for one ball (3) each from both ball rows (4, 5), each cage piece (7), as viewed in the running direction of the balls (3), being provided at both ends with convexly curved end surfaces (9) for contact with the end surfaces (9) of adjacent cage pieces (7), which end surfaces (9) extend essentially up to the cage piece sides (10).

## Claims

### Claim 1

A linear ball bearing having a guide carriage (2) which is guided on a guide rail (1) in a longitudinally displaceable manner and is mounted in rolling contact on longitudinal sides of the guide rail (1) via balls (3) which are arranged on each longitudinal side in at least two parallel ball rows (4, 5) encircling in endless ball channels (6), each ball (3) of the one ball row (5) together with an adjacent ball (3) of the other ball row (4) being held in cage pockets (8) of a common cage piece (7), characterized in that the cage piece (7) has exactly two cage pockets (8) for one ball (3) each from both ball rows (4, 5), each cage piece (7), as viewed in the running direction of the balls (3), being provided at both ends with convexly curved end surfaces (9) for contact with the end surfaces (9) of adjacent cage pieces (7), which end surfaces (9) extend essentially up to the cage piece sides (10).

### Claim 2 (depends on 1)

The linear ball bearing as claimed in claim 1, in which the two cage pockets (8) of the cage piece (7) are connected to one another in one piece by a web (11) whose web sides facing away from one another and arranged essentially parallel to the running direction of the balls (3) are provided with contact surfaces (12, 13) for guiding the cage piece (7) on guide surfaces (14, 15, 16, 17) of the guide carriage (2).

### Claim 3 (depends on 1)

The linear ball bearing as claimed in claim 1, in which the end surfaces (9) have a partly cylindrical profile, the cylinder axis of which is arranged transversely to the running direction of the balls (3) and parallel to a plane in which the two ball rows (4, 5) of a longitudinal side lie.