# US 9,752,579 B2 · Scroll member and scroll-type fluid machine

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- Number: US 9,752,579 B2
- Document ID: US9752579B2
- Status: Granted
- Kind: B2
- Application number: 15/025,017
- Filed: 2014-09-29
- Published: 2016-08-18
- Granted: 2017-09-05
- Earliest claimed: 2013-09-27
- Assignees: Taiho Kogyo Co., Ltd.
- Applicants: Taiho Kogyo Co., Ltd.
- Inventors: Hiroshi Kanemitsu; Masanori Akizuki
- Web page: https://patentgrep.com/patent/US9752579B2

## CPC

- F04C 18/0292: {Ports or channels located in the wrap}
- F01C 19/005: {Structure and composition of sealing elements such as sealing strips, sealing rings and the like; Coating of these elements (vane construction F01C21/0809; piston rings and ring sealings of similar construction in general F16J9/00)}
- F01C 19/08: Axially-movable sealings for working fluids
- F01C 21/104: {Stators; Members defining the outer boundaries of the working chamber}
- F04C 18/0215: {where only one member is moving}
- F04C 18/0284: {Details of the wrap tips}
- F04C 27/005: {Axial sealings for working fluid}
- F04C 2210/22: gaseous, i.e. compressible
- F04C 2230/91: Coating
- F05C 2253/20: Resin
- F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F01C: ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES (internal-combustion aspects F02B53/00, F02B55/00)
- 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

A scroll member includes a base having a panel and a spiral blade provided to extend from the panel toward another scroll member, resin layer L1 formed on the base, and a plurality of grooves C formed on a surface of the resin layer. The plurality of grooves C are formed on the surface of resin layer L1. A cross-section of each groove C has a shape similar to a U-shape or a semicircle in which the width decreases toward the deeper position and the rate of change in width increases toward the bottom. Grooves C are formed by moving an edge of a cutting tool along the original surface of the resin layer, which is originally formed on base L0 by application or the like.

## Claims

### Claim 1

A scroll member arrangement comprising:
first and second scroll members interleaved with each other, the first scroll member comprising a panel and a spiral blade extending from the panel towards the second scroll member;
a resin layer formed on the spiral blade; and
a plurality of grooves formed on a surface of the resin layer of said spiral blade, each of the plurality of said grooves having a depth that is smaller than a pitch between two of the plurality of said grooves.

### Claim 2 (depends on 1)

The scroll member according to claim 1,
wherein the plurality of said grooves have a width that is smaller than or equal to a pitch between adjacent grooves of the plurality of grooves.

### Claim 3 (depends on 1)

The scroll member according to claim 1,
wherein the plurality of said grooves are formed in a direction other than along the length of the blade.

### Claim 4 (depends on 1)

The scroll member according to claim 1,
wherein the plurality of said grooves have a spiral shape.

### Claim 5 (depends on 1)

The scroll member according to claim 1,
wherein the plurality of said grooves are formed so as to be connected to other grooves formed on a surface adjacent to the surface on which the plurality of said grooves are formed.

### Claim 6

A scroll fluid machine comprising:
a scroll member arrangement comprising:
first and second scroll members interleaved with each other, the first scroll member comprising a panel and a spiral blade extending from the panel towards the second scroll member;
a resin layer formed on the spiral blade; and
a plurality of grooves formed on a surface of the resin layer of said spiral blade, each of the plurality of said grooves having a depth that is smaller than a pitch between two of the plurality of said grooves;
wherein the second scroll member increases or reduces a volume of a space formed by the first and second scroll members through engagement with the first scroll member and rotating relative thereto.