JPS59183090A - Scroll type compressing device - Google Patents
Scroll type compressing deviceInfo
- Publication number
- JPS59183090A JPS59183090A JP5593783A JP5593783A JPS59183090A JP S59183090 A JPS59183090 A JP S59183090A JP 5593783 A JP5593783 A JP 5593783A JP 5593783 A JP5593783 A JP 5593783A JP S59183090 A JPS59183090 A JP S59183090A
- Authority
- JP
- Japan
- Prior art keywords
- movable element
- scroll
- spherical bodies
- tank
- fixed element
- 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.)
- Pending
Links
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
- F01C17/063—Arrangements for drive of co-operating members, e.g. for rotary piston and casing using cranks, universal joints or similar elements with only rolling movement
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】
〔発明の技術分野〕
本発明は、タンク内にスクロール型圧縮機構を収容して
なるスクロール型圧縮装置の改良に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an improvement of a scroll-type compression device in which a scroll-type compression mechanism is housed in a tank.
従来、ガスを圧縮する装置として、スクロール型圧縮装
置が知られている。この圧縮装置は、一対のスクロール
翼を軸方向に組合せて圧縮機構を構成したもので、/」
\型、高効率、低振動等の利点を備えている。Scroll-type compression devices are conventionally known as devices for compressing gas. This compression device has a compression mechanism constructed by combining a pair of scroll blades in the axial direction.
It has advantages such as \ type, high efficiency, and low vibration.
ところで、このようガスクロール型圧縮装置は、通常、
第1図に示すように構成されている。By the way, such a gas scroll type compression device usually
It is constructed as shown in FIG.
すなわち、タンクI内のやや上方寄シの位置に上記夕/
り1内を上下方向に仕切る形態にフレーム2を固定し、
このフレーム2の上方にスクロール型圧縮機構3を配置
し、またフレーム2の下方に上記スクロール型圧縮機構
3に駆動動力を与えるモータ4を配置し、さらにタンク
1の底部に潤滑油5を収容したものとなっている。In other words, in the tank I, at a position slightly above the
The frame 2 is fixed in a form that partitions the inside of the room 1 in the vertical direction,
A scroll type compression mechanism 3 is disposed above the frame 2, a motor 4 for providing driving power to the scroll type compression mechanism 3 is disposed below the frame 2, and lubricating oil 5 is stored at the bottom of the tank 1. It has become a thing.
スクロール型圧m機構lは、固定要素1ノと、この固定
要素1ノの下方に配置された可動要素12とで構成され
ている。固定要素1ノは、円板状の基板13と、この基
板13の一方の面周縁部に突設された環状壁14と、こ
の環状壁14で囲まれた部分に上記環状壁14とほぼ等
しい高さに突設されたスクロール翼15と、基板13の
中央部に設けられた吐出口16と、環状壁14に設けら
れた吸込口17とで構成されている。そして、上記のよ
うに構成された固定要素1ノは環状壁14およびスクロ
ール翼15の突出方向を下方として上記環状壁14の周
縁部がタンク1の内周面に固定され、丑だ、吸込口17
がタンク1および頃状壁14を気密に貫通して設けられ
た吸込管18に接続されている。The scroll-type pressure mechanism 1 is composed of a fixed element 1 and a movable element 12 arranged below the fixed element 1. The fixing element 1 includes a disk-shaped substrate 13, an annular wall 14 protruding from the periphery of one side of the substrate 13, and a portion surrounded by the annular wall 14 that is approximately equal to the annular wall 14. It is comprised of scroll blades 15 that protrude in height, a discharge port 16 provided in the center of the substrate 13, and a suction port 17 provided in the annular wall 14. The fixing element 1 configured as described above is fixed to the inner peripheral surface of the tank 1 with the peripheral edge of the annular wall 14 facing downward in the direction in which the annular wall 14 and the scroll blades 15 protrude. 17
is connected to a suction pipe 18 which is provided through the tank 1 and the wall 14 in an airtight manner.
一方、可動要素12は、前記環状壁14の内径より大き
い外径の基板19と、この基板19の一方の面に前記ス
クロール翼15の高さとほぼ等しい高さに突設されたス
クロール翼2oと、基板19の他方の血中央部に突設さ
れた小軸21とで構成されている。そして、上記可動要
素12は、スクロール翼2oの突設方向を上方として、
上記スクロール翼2oとスクロール翼15とがかみ合い
、かつ基板19の周辺部が環状壁14の端面に摺接する
ように装着され、この装着状態が上記基板19と前述し
たフレーム2との間に設けられたオルダム機構31によ
って保持されている。On the other hand, the movable element 12 includes a base plate 19 having an outer diameter larger than the inner diameter of the annular wall 14, and a scroll blade 2o protruding from one surface of the base plate 19 at a height approximately equal to the height of the scroll blade 15. , and a small shaft 21 protruding from the center of the other side of the substrate 19. The movable element 12 is arranged such that the direction in which the scroll blades 2o protrude is upward.
The scroll blades 2o and the scroll blades 15 are mounted so that they are engaged with each other, and the peripheral portion of the base plate 19 is in sliding contact with the end face of the annular wall 14, and this mounted state is provided between the base plate 19 and the frame 2 described above. It is held by an Oldham mechanism 31.
オルダム機構31は、第2図に示すように、基板19の
下面で、かつ小軸21を境にして両側に同一線上に位置
するよう忙固定されたキー32h、32bと、フレーム
2の上面で、かつ上記キー32 a 、32bの配列線
と直交する線上に固定されたキー33h、33bと、こ
れらキー33h、33b、32g、32bがそれぞれ微
小間隙をもって嵌入する溝34&〜34dを上下面に有
したリング35とで構成されている。As shown in FIG. 2, the Oldham mechanism 31 includes keys 32h and 32b fixedly fixed on the lower surface of the base plate 19 and on both sides of the small shaft 21 in the same line, and keys 32h and 32b fixed on the upper surface of the frame 2. , and keys 33h, 33b fixed on a line perpendicular to the arrangement line of the keys 32a, 32b, and grooves 34&~34d on the upper and lower surfaces into which these keys 33h, 33b, 32g, 32b fit, respectively, with minute gaps. The ring 35 is made up of
しかして、前記フレーム2には、前記小軸21の軸心線
とは偏心した軸受孔41が上下方向に貫通して設られて
いる。この軸受孔4ノは、小軸21側に位置する部分が
大径に形成されている。そして、上記軸受孔41内に前
述したモータ4の回転軸42が回転自在に支持されてい
る。回転軸42には、前述した軸受孔41の大径部分に
位置する部分に大径部43が形成されておシ、この大径
部43に前述した小軸21が嵌合する孔44が形成され
ている。なお、回転軸42は、その下端が潤滑油5内に
侵入する長さに形成されておシ、また内部には遠心ポン
プ作用で潤滑油5を軸受面や小軸21と孔44との嵌合
部に汲み上げる孔45が形成されている。Thus, the frame 2 is provided with a bearing hole 41 that is eccentric from the axis of the small shaft 21 and passes through it in the vertical direction. The bearing hole 4 has a large diameter portion located on the small shaft 21 side. The rotating shaft 42 of the motor 4 described above is rotatably supported within the bearing hole 41. The rotating shaft 42 has a large diameter portion 43 formed in a portion located in the large diameter portion of the bearing hole 41 described above, and a hole 44 into which the small shaft 21 described above fits is formed in this large diameter portion 43. has been done. Note that the rotating shaft 42 is formed in such a length that its lower end penetrates into the lubricating oil 5, and inside the rotating shaft 42, the lubricating oil 5 is pumped into the bearing surface and between the small shaft 21 and the hole 44 by a centrifugal pump action. A pumping hole 45 is formed at the joint.
また、第1図中46は高圧ガスを送り出す送出管を示し
、また47は潤滑油を下方へ案内する溝を示している。Further, in FIG. 1, numeral 46 indicates a delivery pipe for sending out high-pressure gas, and 47 indicates a groove for guiding lubricating oil downward.
しかして、この装置は次のようにしてガス圧縮を行なう
ようにしている。すなわち、モータ4を回転させると、
その回転力が軸42を介して可動要素12に伝えられる
。この場合、可動要素12の小軸21は軸42に対して
偏心しておシ、また、オルダム機構31によって支持さ
れているので、この可動要素12は自転の伴なわない旋
回運動を行なう。したがって、可動要素12のスクロー
ル翼20も旋回運動を行なう。This device compresses gas in the following manner. That is, when the motor 4 is rotated,
The rotational force is transmitted to the movable element 12 via the shaft 42. In this case, since the small shaft 21 of the movable element 12 is eccentric with respect to the shaft 42 and is supported by the Oldham mechanism 31, the movable element 12 performs a turning motion without rotation. Therefore, the scroll blades 20 of the movable element 12 also perform a swirling movement.
この旋回運動に伴かって、固定要素11と可動要素12
との間に形成された、いわゆる圧縮室Pの容積が第3図
(a) (b) (c)に示すように周期的に小さくな
り、これによって圧縮されたガスが吐出口16から吐出
され、圧縮装置としての機能を発揮している。Along with this pivoting movement, the fixed element 11 and the movable element 12
As shown in FIGS. 3(a), 3(b), and 3(c), the volume of the so-called compression chamber P, which is formed between the , it functions as a compression device.
しかしながら、上記のように構成された従来のスクロー
ル型圧縮装置にあっては次のような問題があった。すな
わち、この装置を良好に作動させるには、各摺動部を良
好に潤滑する必要がある。However, the conventional scroll type compression device configured as described above has the following problems. That is, in order to operate this device well, each sliding part needs to be well lubricated.
このため、従来装置では、モータ4の回転軸42内に遠
心271機能を発揮する孔45を設け、これによってタ
ンク1の底部に収容されている賃滑油5を汲み上げ、各
摺動部へ供給するようにしている。For this reason, in the conventional device, a hole 45 that performs a centrifugal function is provided in the rotating shaft 42 of the motor 4, whereby the lubricating oil 5 stored at the bottom of the tank 1 is pumped up and supplied to each sliding part. I try to do that.
すなわち、孔45によって汲み上げられた潤滑油は、軸
受孔41の内周面と回転軸42との間を潤滑した後、孔
44の内周面と軸21との間を潤滑し、次にオJl/ダ
ム機構31を潤滑し、続いて、環状壁14と基板19と
の摺動部を潤滑して圧縮室P内に入シ、スクロール翼1
5.20の摺動面を潤滑した後、吐出口16からガスと
一緒に吐出され、続いて溝47を通してタンク1の底部
へと戻って循環する。したがって、運転時には、タンク
1内が高圧に保持されることになる。一方、圧縮室P内
の圧力は、その圧縮原理からして周辺部が低圧に1中心
部か1−・高圧に保持される。とのたーめ、可動要素1
2の基板19には、タンク1内の圧力と圧縮室P内の圧
力との差圧が加わ)、この差圧は可動要素12を固定要
素11に強く押し付ける上向きの力となって作用する。That is, the lubricating oil pumped up by the hole 45 lubricates between the inner peripheral surface of the bearing hole 41 and the rotating shaft 42, then lubricates between the inner peripheral surface of the hole 44 and the shaft 21, and then The Jl/dam mechanism 31 is lubricated, and then the sliding part between the annular wall 14 and the substrate 19 is lubricated, and the scroll blade 1 enters the compression chamber P.
After lubricating the sliding surfaces of 5.20, it is discharged from the discharge port 16 together with the gas, and then returns to the bottom of the tank 1 through the groove 47 for circulation. Therefore, during operation, the inside of the tank 1 is maintained at a high pressure. On the other hand, the pressure in the compression chamber P is maintained at a low pressure at the periphery and at a high pressure at the center due to the principle of compression. Tonotame, moving element 1
The pressure difference between the pressure inside the tank 1 and the pressure inside the compression chamber P is applied to the substrate 19 of the second substrate 19), and this pressure difference acts as an upward force that strongly presses the movable element 12 against the fixed element 11.
このため、固定要素11と可動要素12との摺動部の摩
擦抵抗が増加し、これらの摩耗が著しいばかシか駆動電
力の増加を招き、はなはだしい場合には上記摺動部に焼
き付きが生じるなどの問題があった。For this reason, the frictional resistance of the sliding parts between the fixed element 11 and the movable element 12 increases, and if the wear of these parts is significant, the driving power increases, and in extreme cases, the sliding parts may seize. There was a problem.
本発明は、このような事情に鑑みてなされたもので、そ
の目的とするところは、固定要素と可動要素との間の摩
擦抵抗を低減でき、もって、長寿命化、信頼性の向上化
ならびに駆動電力の減少化を図れるスクロール型圧縮装
置を提供することにある。The present invention has been made in view of the above circumstances, and its purpose is to reduce the frictional resistance between the fixed element and the movable element, thereby extending the service life, improving reliability, and An object of the present invention is to provide a scroll type compression device that can reduce driving power.
本発明は、固定要素と可動要素とを軸方向に組合せたス
クロール型圧縮機構をタンク内に収容したものKあって
、固定要素と可動要素とが軸方向に尚接して圧縮室を形
成するこれら要素の周辺面間に上記可動要素の旋回範囲
では自由に転動する球体を周方向に亘って複数介在させ
たことを特徴としている。The present invention has a scroll-type compression mechanism in which a fixed element and a movable element are combined in the axial direction, which is accommodated in a tank, and the fixed element and the movable element are still in contact with each other in the axial direction to form a compression chamber. The movable element is characterized in that a plurality of spheres that roll freely in the rotation range of the movable element are interposed between the peripheral surfaces of the elements in the circumferential direction.
上記構成であると、可動要素に加わる固定要素側へ向か
う押付は力の全部または一部を転勤自在な球体によって
受けさせることができる。With the above configuration, all or part of the force applied to the movable element toward the fixed element can be received by the movable sphere.
したがって、従来装置に較べて固定要素と可動要素との
間の摩擦抵抗を小さくできる。この結果、圧縮機能を損
なわずに両要素の摺動部分の摩耗を抑制でき、長寿命化
、信頼性の向上化を図れるばかりか駆動電力の減少化を
図ることができる。Therefore, the frictional resistance between the fixed element and the movable element can be reduced compared to conventional devices. As a result, it is possible to suppress the wear of the sliding parts of both elements without impairing the compression function, and it is possible not only to prolong the life and improve the reliability, but also to reduce the driving power.
以下、本発明の実施例を図面を参照しながら説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第4図は、本発明の一実施例に係る圧縮装置の要部だけ
を局部的に示すもので第1図と同一部分は同一符号で示
しである。したがって、重複する部分の説明は省略する
。FIG. 4 shows only the main parts of a compression device according to an embodiment of the present invention, and the same parts as in FIG. 1 are designated by the same reference numerals. Therefore, the explanation of the overlapping parts will be omitted.
この実施例においては、固定要素11の環状壁14で可
動要素12の基板19側に位置する面に第5図および第
6図に示すように円形の凹部51を周方向に等間隔に複
数設けるとともに可動要素120基板19の周縁部で、
上記環状壁14と対向する面に環状の段部52を設け、
この段部52と各凹部51との間に球体53をそれぞれ
介在させている。各球体53と四部5ノの内面との間お
よび各球体53と段部52との間には高硬度材で形成さ
れたスペーサ54゜55がそれぞれ介挿されている。そ
して、各球体53としては、凹部51の周辺壁56と可
動要素1zの基板19との間に運転時においてたとえば
数10ミクロン程度の間隙を形成し得る直径のものが用
いられておシ、また各凹部5ノの直径は、可動要素12
の旋回範囲で各球体53を自由に転動させ得る値に設定
されている。In this embodiment, a plurality of circular recesses 51 are provided at equal intervals in the circumferential direction on the surface of the annular wall 14 of the fixed element 11 located on the substrate 19 side of the movable element 12, as shown in FIGS. 5 and 6. and at the periphery of the movable element 120 substrate 19,
An annular step portion 52 is provided on the surface facing the annular wall 14,
A sphere 53 is interposed between the stepped portion 52 and each recess 51. Spacers 54 and 55 made of a high-hardness material are inserted between each sphere 53 and the inner surface of the four parts 5 and between each sphere 53 and the step part 52, respectively. Each sphere 53 has a diameter that can form a gap of, for example, several tens of microns between the peripheral wall 56 of the recess 51 and the substrate 19 of the movable element 1z during operation. The diameter of each recess 5 is determined by the movable element 12.
It is set to a value that allows each sphere 53 to roll freely within the rotation range of .
このような構成であると、運転時に可動要素12に固定
要素側に向かう大きガ押付力が作用しても、この力の全
部あるいはほとんどが摩擦係数の小さい転勤自在な球体
53によって受は取められることになる。With such a configuration, even if a large pushing force toward the fixed element is applied to the movable element 12 during operation, all or most of this force is received by the movable sphere 53 with a small coefficient of friction. It will be done.
したがって、固定要素11と可動要素12との間の摩擦
抵抗を小さくでき、これによって摺動部の摩耗を少なく
でき、結局、全体の長寿命化、信頼性向上化ならびに消
費電力のA 麦化を図れることになる。Therefore, the frictional resistance between the fixed element 11 and the movable element 12 can be reduced, thereby reducing the wear of the sliding parts, resulting in longer overall life, improved reliability, and reduced power consumption. It will be possible to achieve this goal.
なお、本発明は、上述した実施例に限定されるものでは
ない。すなわち、上述した実施例では、凹部51を固定
要素側に設けているが可動要素側に設けてもよい。また
、凹部の代りに環状溝を設け、この環状溝内に各球体を
少々くとも旋回範囲内では自由に転勤可能に保持する保
持部材を装着するようにしてもよい。また、オルダム機
構および周辺壁5ノと基板19との間を迂回させて潤滑
油を導く、小孔を設けてもよい。Note that the present invention is not limited to the embodiments described above. That is, in the embodiment described above, the recess 51 is provided on the fixed element side, but it may be provided on the movable element side. Further, instead of the recess, an annular groove may be provided, and a holding member may be installed in this annular groove to hold each sphere so that it can be freely moved within at least a small turning range. Further, a small hole may be provided to guide the lubricating oil in a detour between the Oldham mechanism and the peripheral wall 5 and the substrate 19.
第1図は従来のスクロール型圧縮装置の縦断面図、第2
図は同装置のオルダム機構を説明するための図、第3図
は同装置の圧縮動作を説明するだめの図、第4図は本発
明の一実施例に係るスクロール型圧縮装置の要部だけを
取り出して示す縦断面図、第5図は同装置の要部を局部
的に取シ出して示す断面図、第6図は第5図におけるX
−X線矢視図である。
1・・・タンク、2・・・フレーム、3・・・スクロー
ル型圧縮機構、4・・・モータ、5・・・潤滑油、11
・・・固定要素、12・・・可動要素、15.20・・
・スクロール翼、16・・・吐出口、17・・・吸込口
、3ノ・・・オルダム機構、51・・・凹部、52・・
・段部、53・・・球体。
出願人代理人 弁理士 鈴 江 武 彦TH’j
1 図
1
7
第2図
1
第 4 図
第5図 第6図Fig. 1 is a vertical cross-sectional view of a conventional scroll type compression device;
The figure is a diagram for explaining the Oldham mechanism of the same device, FIG. 3 is a diagram for explaining the compression operation of the same device, and FIG. 4 is only a main part of a scroll type compression device according to an embodiment of the present invention. Figure 5 is a cross-sectional view showing the main parts of the device taken out, and Figure 6 is a cross-sectional view showing the
- It is an X-ray arrow view. DESCRIPTION OF SYMBOLS 1...Tank, 2...Frame, 3...Scroll type compression mechanism, 4...Motor, 5...Lubricating oil, 11
...Fixed element, 12...Movable element, 15.20...
・Scroll blade, 16...Discharge port, 17...Suction port, 3...Oldham mechanism, 51...Recess, 52...
- Stepped part, 53... sphere. Applicant's agent Patent attorney Suzue Takehiko TH'j
1 Figure 1 7 Figure 2 1 Figure 4 Figure 5 Figure 6
Claims (3)
する形状にそれぞれが形成されるとhもに上記圧縮室内
で互いにかみ合うスクロール翼をそれぞれが有した固定
要素と可動要素とからなるスクロール型圧縮機構をタン
ク内に収容し、上記圧縮室の吸込口をタンク外に通じさ
せるとともに上記圧縮室の吐出口を上記タンク内を経由
させてタンク外に通じさせ、上記タンク内に設けられた
モータの動力で上記可動要素を自転の伴なわない旋回運
動させることにょシガス圧縮を行なうようにしたスクロ
ール型圧縮装置において、軸心線と直交する前記固定要
素の周辺面と上記面に接して前記圧縮室を形成する前記
可動要素の周辺面との間に少なくとも上記可動要素の前
記旋回範囲では自由に転動する球体を周方向に亘って複
数介在させてなることを特徴とするスクロール型圧縮装
置。(1) A fixed element and a movable element, each having a scroll blade that meshes with each other within the compression chamber, are each formed in a shape that forms a compression chamber between them by combining them in the axial direction. A scroll type compression mechanism is housed in the tank, and the suction port of the compression chamber is communicated with the outside of the tank, and the discharge port of the compression chamber is communicated with the outside of the tank via the inside of the tank. In the scroll type compression device, the movable element is compressed by rotating the movable element without rotation using the power of the motor, in which a peripheral surface of the fixed element perpendicular to the axis is in contact with the surface. and a peripheral surface of the movable element forming the compression chamber, a plurality of spheres are interposed in the circumferential direction and freely roll at least in the rotation range of the movable element. Compression device.
周方向に亘って複数形成された凹部内に収容されてなる
ことを特徴とする特許請求の範囲第1項記載のスクロー
ル型圧縮装置。(2) The scroll mold according to claim 1, wherein each of the spheres is accommodated in a plurality of recesses formed circumferentially on one of the two peripheral surfaces. Compression device.
材で形成されたスペーサが介挿されてなることを特徴と
する特許請求の範囲第1項一または第2項記載のスクロ
ール型圧縮装置。(3) A spacer made of a high-hardness material is inserted between each of the spheres and the two peripheral surfaces. Scroll type compression device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5593783A JPS59183090A (en) | 1983-03-31 | 1983-03-31 | Scroll type compressing device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5593783A JPS59183090A (en) | 1983-03-31 | 1983-03-31 | Scroll type compressing device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS59183090A true JPS59183090A (en) | 1984-10-18 |
Family
ID=13012983
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5593783A Pending JPS59183090A (en) | 1983-03-31 | 1983-03-31 | Scroll type compressing device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59183090A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0809030A1 (en) * | 1996-05-20 | 1997-11-26 | Sanden Corporation | Scroll type fluid displacement apparatus with rotation preventing means |
US6149412A (en) * | 1998-08-05 | 2000-11-21 | Sanden Corporation | Rotation preventing mechanism using thrust ball bearing and scroll type compressor using the same |
US6158991A (en) * | 1998-02-26 | 2000-12-12 | Sanden Corporation | Scroll-type fluid machine in which a movable scroll member is elastically urged towards a fixed scroll member |
US6200115B1 (en) | 1998-08-04 | 2001-03-13 | Sanden Corporation | Scroll type compressor and rotation preventing mechanism used in the same |
-
1983
- 1983-03-31 JP JP5593783A patent/JPS59183090A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0809030A1 (en) * | 1996-05-20 | 1997-11-26 | Sanden Corporation | Scroll type fluid displacement apparatus with rotation preventing means |
US6158991A (en) * | 1998-02-26 | 2000-12-12 | Sanden Corporation | Scroll-type fluid machine in which a movable scroll member is elastically urged towards a fixed scroll member |
US6200115B1 (en) | 1998-08-04 | 2001-03-13 | Sanden Corporation | Scroll type compressor and rotation preventing mechanism used in the same |
US6149412A (en) * | 1998-08-05 | 2000-11-21 | Sanden Corporation | Rotation preventing mechanism using thrust ball bearing and scroll type compressor using the same |
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