# US 10,770,946 B2 · Stator having seal member, and motor

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 10,770,946 B2
- Document ID: US10770946B2
- Status: Granted
- Kind: B2
- Application number: 15/351,559
- Filed: 2016-11-15
- Published: 2017-05-18
- Granted: 2020-09-08
- Earliest claimed: 2015-11-17
- Assignees: Fanuc Corporation
- Applicants: Fanuc Corporation
- Inventors: Kouji Kobayashi; Takeshi Tamaki
- Web page: https://patentgrep.com/patent/US10770946B2

## CPC

- H02K 5/10: with arrangements for protection from ingress, e.g. water or fingers
- H02K 5/124: Sealing of shafts
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

A stator includes a first stator part, a second stator part, and an annular seal member. The annular seal member is provided with a plurality of protrusions extending radially outward. A groove part corresponding to the annular seal member, and a plurality of recessed parts, which correspond to the plurality of protrusions of the annular seal member and which are to be connected to the groove part, are formed in at least one of the first stator part and the second stator part.

## Claims

### Claim 1

A stator comprising:
a first stator part;
a second stator part incorporated in the first stator part; and
an annular seal member sandwiched between the first stator part and the second stator part, wherein
the annular seal member is provided with a plurality of protrusions extending radially outward, and
a groove part and a plurality of recessed parts formed in at least one of the first stator part and the second stator part, the groove part corresponding to the annular seal member, and the plurality of recessed parts correspond to the plurality of protrusions of the annular seal member, and are connected to the groove part at a radially outward side of one of the first stator part and the second stator part, the groove part and the plurality of recessed parts each has a depth measured in a direction perpendicular to a radial direction wherein the depth of the groove part is uniform and the depth of each of the plurality of recessed parts is greater than the depth of the groove part,
each of the plurality of protrusions of the annular seal has a radially outward extending portion, which extends radially outward of the one of the first stator part and the second stator part, and a depth direction extending portion, which extends in the depth direction of each of the plurality of recessed parts only on the one side of the radially outward extending portion.

### Claim 2 (depends on 1)

The stator according to claim 1, wherein the dimensions of each recessed part are smaller than the dimensions of each protrusion.

### Claim 3 (depends on 1)

The stator according to claim 1, wherein the length of the groove part, which corresponds to a distance between two adjacent recessed parts, is different from the length of the annular seal member, which corresponds to a distance between two adjacent protrusions.

### Claim 4 (depends on 1)

The stator according to claim 1, wherein the annular seal member is sandwiched between and pressed by the first stator part and the second stator part, and is positioned between two walls defining the groove part.

### Claim 5 (depends on 1)

A motor comprising the stator according to claim 1 and a rotor engaged with the stator.

### Claim 6 (depends on 1)

The stator according to claim 1, wherein a distance between the protrusion and the annular seal member is smaller than a distance between the recessed part and the groove part.