JPH01113184U

JPH01113184U -

Info

Publication number: JPH01113184U
Application number: JP740988U
Authority: JP
Priority date: 1988-01-22
Filing date: 1988-01-22
Publication date: 1989-07-31

Description

[Brief explanation of the drawing]

第１図はこの発明の一実施例を示す部分拡大断
面図、第２図はこの発明の全体断面図、第３図は
この発明の要部拡大平面図、第４図は従来装置の
部分断面図である。図中、１は駆動スクロール、
１ａ，２ａは渦巻突起体、１ｃは吐出口、１ｄは
排気経路、１ｅは吐出穴、２は従動スクロール、
３は容器、３ａは吸気口、７は上部ハウジング、
２４は弁、２８は弁座、２８ａは雌ねじ、２８ｂ
は切欠きである。なお各図中同一符号は同一又は
相当部分を示す。 FIG. 1 is a partially enlarged sectional view showing an embodiment of the present invention, FIG. 2 is an overall sectional view of the present invention, FIG. 3 is an enlarged plan view of essential parts of the present invention, and FIG. 4 is a partial sectional view of a conventional device. It is a diagram. In the figure, 1 is a driving scroll;
1a and 2a are spiral protrusions, 1c is a discharge port, 1d is an exhaust route, 1e is a discharge hole, 2 is a driven scroll,
3 is a container, 3a is an intake port, 7 is an upper housing,
24 is a valve, 28 is a valve seat, 28a is a female thread, 28b
is a notch. Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims

[Scope of utility model registration request]

a first container communicating with the inside of the vacuum container to be evacuated; a second container airtightly coupled to the first container, communicating with the atmosphere, and having oil sealed therein;
a communication port that is rotatably and airtightly supported by the second container and communicates with the second container; a first spiral protrusion located in the first container; The first part is located at the center of the spiral protrusion.
a first scroll provided with a discharge port that communicates between the spiral protrusion side and the communication port; rotatably supported by the first container; cooperating with the first scroll protrusion to create a compression chamber; a second scroll having a second spiral protrusion, a drive source for rotationally driving either the first scroll or the second scroll, and a valve fitted to the discharge port. In a scroll vacuum pump equipped with a check valve that prevents a flow path by having a seat and a valve that approaches and separates from the valve seat, the valve seat has a female thread formed therethrough and a shaft that extends through the valve seat. A scroll vacuum pump characterized by having a notch cut out in the direction.