# US 5,704,122 A · Sealed-type scroll compressor and assembling method therefor

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- Number: US 5,704,122 A
- Document ID: US5704122A
- Status: Granted
- Kind: A
- Application number: 08/783,634
- Filed: 1997-01-14
- Granted: 1998-01-06
- Earliest claimed: 1993-12-24
- Assignees: Matsushita Electric Industrial Co., Ltd.
- Inventors: Masahiro Tsubokawa; Osamu Aiba; Toshiharu Yasu; Shuichi Yamamoto; Hideo Hirano; Taisei Kohayakawa; Shozo Hase
- Web page: https://patentgrep.com/patent/US5704122A

## CPC

- F04C 18/0215: {where only one member is moving}
- F01C 21/102: {Adjustment of the interstices between moving and fixed parts of the machine by means other than fluid pressure}
- F04C 2230/60: Assembly methods
- F05C 2251/046: dissimilar
- Y10T 29/4924: Scroll or peristaltic type
- 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
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

In a sealed-type scroll compressor having a stationary scroll member and an orbiting scroll member, the stationary scroll member is fixed after rotating it in an orbiting direction of the orbiting scroll member by a predetermined angle from a phase angle position where a possible orbiting radius between both scroll members is made maximum at the temperature before driving the scroll compressor.

## Claims

### Claim 1

Method for assembling a sealed-type scroll compressor having a stationary scroll member to be fixed to a frame and an orbiting scroll member to be engaged with said stationary scroll member, said method comprising the steps of:
temporarily positioning said stationary scroll member on said frame to come into engagement with said orbiting scroll member;
relatively positioning one of said scroll members with respect to the other scroll member in a phase angle direction of wraps of said scroll members;
positioning said stationary scroll member with respect to said orbiting scroll member in X-direction and Y-direction of said scroll members;
shifting one of said scroll members, which has a coefficient of thermal expansion smaller than the other scroll member, in an orbiting direction of said orbiting scroll member by a predetermined phase angle; and
fixing said stationary scroll member to said frame.

### Claim 2 (depends on 1)

Method for assembling a sealed-type scroll compressor in accordance with claim 1, wherein
a radius of a base circle of a wrap of said the other scroll member is made smaller than that of said one of scroll members.