# US 5,344,161 A · Spring for centering two annular bodies relative to each other

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- Number: US 5,344,161 A
- Document ID: US5344161A
- Status: Granted
- Kind: A
- Application number: 08/031,472
- Filed: 1993-03-15
- Granted: 1994-09-06
- Earliest claimed: 1992-02-28
- Assignees: EG&G Sealol, Inc.
- Inventors: Jan Sandgren
- Web page: https://patentgrep.com/patent/US5344161A

## CPC

- F16F 1/02: made of steel or other material having low internal friction {(characterised by their special construction from fibre-reinforced plastics F16F1/366; spring units consisting of several springs F16F3/02; making springs from wire B21F35/00)}; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16C 35/077: between housing and outer race ring
- F16J 15/3464: {Mounting of the seal}
- F16F: SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16J: PISTONS {(specially adapted for dampers F16F9/32)}; CYLINDERS; SEALINGS

## Abstract

A spring centering device for centering two annular bodies relative to one another. The device including a spring (22) with a central spine (20) and multiple fingers (24) extending from the spine (20). Alternatively, the device includes a spring with a central axis including axially oriented elements (34) parallel to but displaced from the central axis, and connecting elements (24) structurally contiguous with an axial element on each side of the central axis.

## Claims

### Claim 1

A ring carrier for holding a ring, the carrier comprising:
an annular body;
an annular pocket formed in said annular body for holding the ring, said pocket having a bottom, a radially inner wall, and a radially outer wall;
an annular groove formed in said radially inner wall of said pocket; and
a spring in said annular groove, the spring including a central spine, said spine being elongated along one axis thereof and multiple fingers extending from the spine, said fingers being elongated along an axis substantially orthogonal to the elongated axis of the spine, wherein each of the fingers has an area cross-sectional to its elongated axis which is smaller than an area of said spine which is cross-sectional to its elongated axis,
whereby the spring serves to center the ring regardless of the relative thermal expansion between the ring and the carrier.

### Claim 2

A shaft attachment system for attaching an annular body to a shaft, the attachment system comprising:
an annular portion of the annular body, said annular portion extending along the shaft and adapted for fitting over the shaft, said annular portion having a radially inner surface adjacent to but spaced from the shaft; and
means for maintaining fit of the annular body to the shaft regardless of the relative thermal and centrifugal expansion therebetween,
wherein said means for maintaining fit comprises an annular pocket formed in said radially inner surface and a spring located in said pocket for pressing against the shaft and the radially inner surface of the annular portion, the spring including a central spine, said spine being elongated along one axis thereof and multiple fingers extending from the spine, said fingers being elongated along an axis substantially orthogonal to the elongated axis of the spine, wherein each finger has an area cross-sectional to its elongated axis which is smaller than an area of said spine which is cross-sectional to its elongated axis.