JPS63170578A - Scroll fluid machine - Google Patents
Scroll fluid machineInfo
- Publication number
- JPS63170578A JPS63170578A JP189387A JP189387A JPS63170578A JP S63170578 A JPS63170578 A JP S63170578A JP 189387 A JP189387 A JP 189387A JP 189387 A JP189387 A JP 189387A JP S63170578 A JPS63170578 A JP S63170578A
- Authority
- JP
- Japan
- Prior art keywords
- key
- annular member
- scroll
- orbiting scroll
- ring member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012530 fluid Substances 0.000 title claims description 13
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 22
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000011120 plywood Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C17/00—Arrangements for drive of co-operating members, e.g. for rotary piston and casing
- F01C17/06—Arrangements for drive of co-operating members, e.g. for rotary piston and casing using cranks, universal joints or similar elements
- F01C17/066—Arrangements for drive of co-operating members, e.g. for rotary piston and casing using cranks, universal joints or similar elements with an intermediate piece sliding along perpendicular axes, e.g. Oldham coupling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は冷凍、空調用冷媒圧縮機あるいは空気圧縮機と
して使用されるスクロール流体機械に係り、特に旋回ス
クロールの１転防止を行うオルダム機構の騒音を低減す
る構造に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a scroll fluid machine used as a refrigerant compressor or an air compressor for refrigeration and air conditioning, and particularly relates to an Oldham mechanism that prevents a single rotation of an orbiting scroll. It relates to a structure that reduces noise.
従来のスクロール流体機械において、旋回スクロールの
自転を防止するオルダム機構は、例えばは特開昭５９−
１４１７８３号に記載のように、環状部材を旋回スクロ
ールの背面とフレームに設けた静止台座との間に配設し
、その環状部材の上面と旋回スクロール背面、および環
状部材の下面と前記静止台座をそれぞれキー及びキー溝
を介して係合させた構成となっている。しかし、環状部
材におけるキーとキー溝との摺動部の隙間と、前記環状
部材、旋回スクロール、静止台座よりなる隙間との関係
については考慮されていなかった。In conventional scroll fluid machines, the Oldham mechanism that prevents rotation of the orbiting scroll is disclosed in, for example, Japanese Patent Laid-Open No. 59-1989.
As described in No. 141783, an annular member is disposed between the back surface of the orbiting scroll and a stationary pedestal provided on the frame, and the top surface of the annular member and the back surface of the orbiting scroll, and the bottom surface of the annular member and the stationary pedestal are connected to each other. They are each engaged through a key and a keyway. However, no consideration was given to the relationship between the gap between the sliding portion of the key and the keyway in the annular member and the gap formed by the annular member, the orbiting scroll, and the stationary pedestal.
上部従来技術は、環状部材におけるキーとキー溝との摺
動部の隙間と、環状部材、旋回スクロールおよび静止台
座よりなる隙間との関係について配慮されておらず、運
転中の回転トルクの変動により環状部材が曲げモーメン
トを受けたとき、該環状部材が旋回スクロールまたは静
止台座に衝突し、大きな騒音を発する問題があった。特
に環状部材の重量が軽い場合、衝突速度が速くなり、騒
音が一層大きくなる。また、キー溝とキーとの摺動部に
おけるキーの片当り角が大きい場合、焼き付き固渋の原
因となっていた。The above conventional technology does not consider the relationship between the gap between the sliding part of the key and the keyway in the annular member and the gap between the annular member, the orbiting scroll and the stationary pedestal, and due to fluctuations in rotational torque during operation. When the annular member is subjected to a bending moment, there is a problem in that the annular member collides with the orbiting scroll or the stationary pedestal and generates a large noise. In particular, if the weight of the annular member is light, the collision speed will be high and the noise will be even louder. Furthermore, if the one-sided contact angle of the key at the sliding portion between the key groove and the key is large, this may cause seizure and stiffness.
本発明の目的は、オルダム機構から発生する騒音を低減
できると共に、キー溝とキーとの摺動性を良くして焼き
付き固渋を防止できるスクロール流体機械を提供するこ
とにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a scroll fluid machine that can reduce the noise generated from the Oldham mechanism, improve the slidability between the keyway and the key, and prevent seizing and stiffness.
上記目的は、合板上に渦巻き状のラップを有する固定ス
クロールおよび旋回スクロールと、静止台座を設けたフ
レームと、旋回スクロールの自転を防止するオルダム機
構とを備え、固定スクロールおよび旋回スクロールが、
その両ラップが互にかみ合うように組合わされ、かつ旋
回スクロールが固定スクロールとフレームとで旋回運動
可能に保持される一方、前記オルダム機構が、環状部材
を旋回スクロール背面とフレームの前記静止台座との間
に配設し、その環状部材の上面と旋回スクロールおよび
環状部材の下面と静止台座を、それぞれキーおよびキー
溝を介して係合させた構成とｆｉ
なっているスクロール流体機構において、前記オルダム
機構の環状部材、旋回スクロール、静止台座よりなる隙
間と環状部材のほぼ半径の比とからなる環状部材の傾き
角を、環状部材におけるキー溝とキーとの摺動部の隙間
とキー高さの比とからなる傾き角を小さくすることによ
り、達成される。The above object includes a fixed scroll and an orbiting scroll having a spiral wrap on plywood, a frame provided with a stationary pedestal, and an Oldham mechanism that prevents rotation of the orbiting scroll.
Both wraps are engaged with each other, and the orbiting scroll is held by the fixed scroll and the frame so as to be able to rotate, while the Oldham mechanism moves the annular member between the back surface of the orbiting scroll and the stationary pedestal of the frame. In the scroll fluid mechanism fi, the upper surface of the annular member is engaged with the orbiting scroll and the lower surface of the annular member is engaged with the stationary pedestal through keys and keyways, respectively. The inclination angle of the annular member is determined by the ratio of the gap between the annular member, the orbiting scroll, and the stationary pedestal to the approximate radius of the annular member, and the ratio of the key height to the gap between the sliding part of the keyway and the key in the annular member. This is achieved by reducing the angle of inclination.
オルダム機構の環状部材、旋回スクロールおよび静止台
座よりなる隙間と環状部材のほぼ半径の比とからなる環
状部材の傾き角が、環状部材におけるキー溝とキーとの
摺動部の隙間とキー高さの比とからなる傾き角よりも小
さくなっているので、回転トルクの変動により環状部材
が曲げモーメントを受けても、該環状部材の傾きが拘束
される。The inclination angle of the annular member, which is the ratio of the gap between the annular member, the orbiting scroll, and the stationary pedestal of the Oldham mechanism and the approximate radius of the annular member, is the gap between the sliding part of the keyway and the key in the annular member and the key height. Since the angle of inclination is smaller than the ratio of the angle of inclination, even if the annular member receives a bending moment due to fluctuations in rotational torque, the inclination of the annular member is restrained.
これにより環状部材の旋回スクロール背面または静止台
座への衝突が弱まって騒音が低減される。This weakens the collision of the annular member with the back surface of the orbiting scroll or the stationary pedestal, thereby reducing noise.
また、キー溝とキーとの摺動部におけるキーの片当り角
が小さくなって焼き付き固渋が防止される。Furthermore, the one-sided contact angle of the key at the sliding portion between the key groove and the key is reduced, and seizing and stiffness is prevented.
以下、本発明の一実施例を第１図ないし第５図により説
明する。第１図は本発明によるスクロール流体機械のオ
ルダム機構部分を模式的に示す断面図、第２図は圧縮機
構部を断面にて示すスクロール流体機械の全体図、第３
図は旋回スクロールの断面図、第４図はフレームの平面
図、第５図はオルダム機構の環状部材の斜視図である。An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. FIG. 1 is a sectional view schematically showing the Oldham mechanism portion of the scroll fluid machine according to the present invention, FIG. 2 is an overall view of the scroll fluid machine showing the compression mechanism section in cross section, and FIG.
The figure is a sectional view of the orbiting scroll, FIG. 4 is a plan view of the frame, and FIG. 5 is a perspective view of the annular member of the Oldham mechanism.
第２図において、スクロール流体機械は、合板上に渦巻
き状のラップを有する固定スクロール１および旋回スク
ロール２と、静止台座４を設けたフレーム３と、旋回ス
クロール２の自転を防止するオルダム機構５とを備えて
いる。固定スクロール１および旋回スクロール２は、そ
の両ラップが互いにかみ合うように組合わされている。In FIG. 2, the scroll fluid machine includes a fixed scroll 1 and an orbiting scroll 2 having spiral wraps on plywood, a frame 3 provided with a stationary pedestal 4, and an Oldham mechanism 5 for preventing rotation of the orbiting scroll 2. It is equipped with The fixed scroll 1 and the orbiting scroll 2 are assembled so that both their wraps are engaged with each other.
また旋回スクロール２は固定スクロール１と前記フレー
ム３とで旋回運動可能に保持され、かつ背面に設けた軸
受６にクランク軸７を支持させ、このクランク軸７によ
り旋回させられる。フレーム３は前記クランク軸７と一
体の主軸８を軸受９を介して支持している。オルダム機
構５は旋回スクロール２の背面とフレーム３の静止台座
４との間に設けられて、旋回スクロール２の自転を防止
するようになっている。このオルダム機構５は、第５図
に示すように、上面に２個のキー１０ａを、下面に２個
のキー１０ｂをそれぞれ設けた環状部材１０を具える一
方、第３図に示すように旋回スクロール２の背面に前記
キー１０ａのキー溝１１を設け、かつ第４図に示すよう
にフレーム３の静止台座４に前記キー１０ｂのキー溝１
２を設けている。そして、第１図に示すように前記環状
部材１０を旋回スクロール２背面と静止台座４との間に
配設し、その上面のキー１０ａを旋回スクロール２のキ
ー溝１１に摺動可能に係合させ、かつ下面のキー１０ｂ
を静止台座４のキー溝１２に摺動可能に係合させている
。また、このオルダム機構５において、前記環状部材１
０の半径をＲ７、各キーの高さをＨＩ、キー１０ｂとキ
ー溝１２との摺動面の隙間をδ１、環状部材１０上面と
旋回スクロール２背面との隙間をδ２、キー１０ａとキ
ー溝１１との摺動面の隙間を６３としたとき、次式の関
係になるように各部の寸法が決められる。The orbiting scroll 2 is supported by the fixed scroll 1 and the frame 3 so as to be able to rotate, and is rotated by a crankshaft 7 supported by a bearing 6 provided on the rear surface. The frame 3 supports a main shaft 8, which is integral with the crankshaft 7, via a bearing 9. The Oldham mechanism 5 is provided between the back surface of the orbiting scroll 2 and the stationary pedestal 4 of the frame 3 to prevent the orbiting scroll 2 from rotating. As shown in FIG. 5, this Oldham mechanism 5 includes an annular member 10 having two keys 10a on the top surface and two keys 10b on the bottom surface, and rotates as shown in FIG. The key groove 11 of the key 10a is provided on the back surface of the scroll 2, and the key groove 11 of the key 10b is provided on the stationary base 4 of the frame 3 as shown in FIG.
2 are provided. Then, as shown in FIG. 1, the annular member 10 is disposed between the back surface of the orbiting scroll 2 and the stationary pedestal 4, and the key 10a on the upper surface of the annular member 10 is slidably engaged with the keyway 11 of the orbiting scroll 2. and the key 10b on the bottom
is slidably engaged with the keyway 12 of the stationary base 4. Further, in this Oldham mechanism 5, the annular member 1
The radius of 0 is R7, the height of each key is HI, the gap between the sliding surface between the key 10b and the keyway 12 is δ1, the gap between the top surface of the annular member 10 and the back surface of the orbiting scroll 2 is δ2, and the key 10a and the keyway When the clearance of the sliding surface with 11 is 63, the dimensions of each part are determined so that the relationship is expressed by the following equation.
δ１
ｔａｎ θ１＝□ ・・・・・・ （２）即ち、上記隙
間δ２によって傾く環状部材ｌＯの傾き角θ２を、キー
およびキー溝の摺動部で傾く環状部材１０の傾き角θヨ
より小さくしである。また、前記環状部材１０は、アル
ミニウム合金などの非鉄金属で作られている。δ1 tan θ1=□ (2) That is, the inclination angle θ2 of the annular member 10 that is inclined by the gap δ2 is smaller than the inclination angle θyo of the annular member 10 that is inclined by the sliding part of the key and keyway. It is. Further, the annular member 10 is made of a non-ferrous metal such as an aluminum alloy.
本実施例において、前記隙間δ２によって傾くオルダム
機構５の環状部材１０の傾き角θ２が、キーおよびキー
溝の摺動部で傾く環状部材１０の傾き角θ、より小さく
なっているので、回転トルクの変動により環状部材１０
が曲げモーメントを受けても、環状部材１０の傾きが拘
束される。これにより環状部材１０の旋回スクロール２
背面または静止台座４への衝突力が弱くなり、騒音が低
減される。In this embodiment, since the inclination angle θ2 of the annular member 10 of the Oldham mechanism 5 which is inclined by the gap δ2 is smaller than the inclination angle θ2 of the annular member 10 which is inclined by the sliding portion of the key and the keyway, the rotational torque Due to the fluctuation of the annular member 10
Even if the annular member 10 is subjected to a bending moment, the inclination of the annular member 10 is restrained. As a result, the orbiting scroll 2 of the annular member 10
The collision force against the back surface or the stationary pedestal 4 is weakened, and noise is reduced.
またキーとキー溝との摺動部におけるキーの片当り角が
小さくなって焼き付き固渋が防止される。Furthermore, the one-side contact angle of the key at the sliding portion between the key and the keyway is reduced, preventing seizure and stiffness.
なお、上記実施例は、オルダム機構５の環状部材１０に
キーを、旋回スクロール２背面およびフレーム３の静止
台座４にキー溝をそれぞれ設けた例を示したが、旋回ス
クロール２背面および静止台座４にキーを、環状部材１
０にキー溝を設ける構成としても、前述と同様の作用、
効果を達成できる。In the above embodiment, a key is provided in the annular member 10 of the Oldham mechanism 5, and a keyway is provided in the back surface of the orbiting scroll 2 and the stationary pedestal 4 of the frame 3. the key to the annular member 1
Even if a keyway is provided at 0, the same effect as described above can be obtained.
effect can be achieved.
本発明によれば、オルダム機構から発生する騒音を低減
でき、かつキーとキー溝の摺動部におけるキーの片当り
角を小さくできるので、焼き付き固渋を防止できる。According to the present invention, the noise generated from the Oldham mechanism can be reduced, and the one-sided contact angle of the key at the sliding portion between the key and the keyway can be reduced, so that seizure and stiffness can be prevented.
【図面の簡単な説明】
第１図ないし第５図は本発明の一実施例を示し、第１図
は本発明によるスクロール流体機械のオルダム機構部分
を模式的に示す断面図、第２図は圧縮機構部を断面にて
示すスクロール流体機械の全体図、第３図は旋回スクロ
ールの断面図、第４図はフレームの平面図、第５図はオ
ルダム機構の環状部材の斜視図である。
１・・・固定スクロール、２・・・旋回スクロール、３
・・・フレーム、４・・・静止台座、５・・・オルダム
機構、１０−・・環状部材、ｌＱａ、１０ｂ−キー、１
１．１２・・・キー溝。
δ１図
ｆ＝−固定スクロール ５−・−オルダ゛’ｔ、
＊＊Ｚ−ａ回又グローＪし ｒｏ＝−１’を状４？ネ
オ３ ・・−フレーム ｆｏａ、ｆｉｂ −
−−キー４−１ｉ中ｊ：合Ａト プｆ、ｆ２．−
キー」１第 ２ ｍ
第３図
＄４図[BRIEF DESCRIPTION OF THE DRAWINGS] FIGS. 1 to 5 show an embodiment of the present invention, FIG. 1 is a sectional view schematically showing the Oldham mechanism part of the scroll fluid machine according to the present invention, and FIG. 3 is a sectional view of the orbiting scroll, FIG. 4 is a plan view of the frame, and FIG. 5 is a perspective view of the annular member of the Oldham mechanism. 1...Fixed scroll, 2...Orbiting scroll, 3
... Frame, 4... Stationary pedestal, 5... Oldham mechanism, 10-... Annular member, lQa, 10b- Key, 1
1.12...Keyway. δ1 diagram f=-Fixed scroll 5-・-Order't,
**Z-a times glow J and ro=-1' as 4? Neo 3...-frame foa, fib-
--Key 4-1i middle j: combination A top f, f2. −
Key” 1 No. 2 m Fig. 3 $4 Fig.
Claims (3)
および旋回スクロールと、静止台座を設けたフレームと
、旋回スクロールの自転を防止するオルダム機構とを備
え、固定スクロールおよび旋回スクロールが、その両ラ
ップが互にかみ合うように組合わされ、かつ旋回スクロ
ールが固定スクロールとフレームとで旋回運動可能に保
持される一方、前記オルダム機構が、環状部材を旋回ス
クロール背面とフレームの前記静止台座との間に配設し
、その環状部材の上面と旋回スクロールおよび環状部材
の下面と静止台座を、それぞれキーおよびキー溝を介し
て係合させた構成となっているスクロール流体機械にお
いて、前記オルダム機構の環状部材，旋回スクロール，
静止台座よりなる隙間と環状部材のほぼ半径の比とから
なる環状部材の傾き角を、環状部材におけるキー溝とキ
ーとの摺動部の隙間とキー高さの比とからなる傾き角よ
り小さくしたことを特徴とするスクロール流体機械。1. The fixed scroll and the orbiting scroll each have a spiral wrap on the base plate, a frame provided with a stationary pedestal, and an Oldham mechanism that prevents the orbiting scroll from rotating. and the orbiting scroll is held by the fixed scroll and the frame so as to be able to rotate, and the Oldham mechanism has an annular member disposed between the back surface of the orbiting scroll and the stationary pedestal of the frame. In the scroll fluid machine, the upper surface of the annular member and the orbiting scroll are engaged with each other, and the lower surface of the annular member and the stationary pedestal are engaged with each other through a key and a keyway, respectively. ，
The angle of inclination of the annular member made up of the gap formed by the stationary pedestal and the ratio of approximately the radius of the annular member is smaller than the angle of inclination made up of the ratio of the key height to the gap between the sliding part of the keyway and the key in the annular member. A scroll fluid machine characterized by:
けられ、旋回スクロールの背面およびフレームの静止台
座にキー溝が設けられている特許請求の範囲第１項記載
のスクロール流体機械。2. The scroll fluid machine according to claim 1, wherein keys are provided on the upper and lower surfaces of the annular member of the Oldham mechanism, and key grooves are provided on the back surface of the orbiting scroll and the stationary pedestal of the frame.
などの非鉄金属で作られている特許請求の範囲第１項記
載のスクロール流体機械。3. The scroll fluid machine according to claim 1, wherein the annular member of the Oldham mechanism is made of a non-ferrous metal such as an aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62001893A JP2545380B2 (en) | 1987-01-09 | 1987-01-09 | Scroll fluid machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62001893A JP2545380B2 (en) | 1987-01-09 | 1987-01-09 | Scroll fluid machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63170578A true JPS63170578A (en) | 1988-07-14 |
| JP2545380B2 JP2545380B2 (en) | 1996-10-16 |
Family
ID=11514260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62001893A Expired - Lifetime JP2545380B2 (en) | 1987-01-09 | 1987-01-09 | Scroll fluid machinery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2545380B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040571C (en) * | 1995-05-19 | 1998-11-04 | 三菱重工业株式会社 | Volute Fluid machinery |
| US5899676A (en) * | 1996-03-18 | 1999-05-04 | Sanden Corporation | Oldham coupling mechanism for a scroll type fluid displacement apparatus |
| US5988999A (en) * | 1995-05-19 | 1999-11-23 | Mitsubishi Jukogyo Kabushiki Kaisha | Scroll type fluid machine having a reduced Oldham ring gap |
| US6139292A (en) * | 1997-07-04 | 2000-10-31 | Sanden Corporation | Scroll-type fluid displacement apparatus including oldham coupling mechanism and method for manufacturing such apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5828433A (en) * | 1981-07-29 | 1983-02-19 | ザ・ベンデイクス・コ−ポレ−シヨン | Manufacture of drum brake shoe |
| JPS58110887A (en) * | 1981-12-25 | 1983-07-01 | Hitachi Ltd | Scroll fluid machine |
| JPS58144601A (en) * | 1982-02-24 | 1983-08-29 | Hitachi Ltd | Scroll fluid apparatus |
| JPS60206988A (en) * | 1984-03-30 | 1985-10-18 | Mitsubishi Electric Corp | Scroll compressor |
-
1987
- 1987-01-09 JP JP62001893A patent/JP2545380B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5828433A (en) * | 1981-07-29 | 1983-02-19 | ザ・ベンデイクス・コ−ポレ−シヨン | Manufacture of drum brake shoe |
| JPS58110887A (en) * | 1981-12-25 | 1983-07-01 | Hitachi Ltd | Scroll fluid machine |
| JPS58144601A (en) * | 1982-02-24 | 1983-08-29 | Hitachi Ltd | Scroll fluid apparatus |
| JPS60206988A (en) * | 1984-03-30 | 1985-10-18 | Mitsubishi Electric Corp | Scroll compressor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040571C (en) * | 1995-05-19 | 1998-11-04 | 三菱重工业株式会社 | Volute Fluid machinery |
| US5988999A (en) * | 1995-05-19 | 1999-11-23 | Mitsubishi Jukogyo Kabushiki Kaisha | Scroll type fluid machine having a reduced Oldham ring gap |
| US5899676A (en) * | 1996-03-18 | 1999-05-04 | Sanden Corporation | Oldham coupling mechanism for a scroll type fluid displacement apparatus |
| US6139292A (en) * | 1997-07-04 | 2000-10-31 | Sanden Corporation | Scroll-type fluid displacement apparatus including oldham coupling mechanism and method for manufacturing such apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2545380B2 (en) | 1996-10-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |