Scroll-type fluid machine including float-protecting pin having

Details Scroll-type fluid machine including float-protecting pin having Scroll-type fluid machine including float-protecting pin having

1998-10-09

2000-06-20

Denion, Thomas

Rotary expansible chamber devices

Weight balanced working member or partition

418 551, 418 556, 418 555, F01C 2100

Patent

active

060770600

ABSTRACT:
A scroll-type fluid machine is provided, which comprises a boss provided in and projecting from a central area in a surface of the end plate of a revolving scroll; a drive bush inserted into the boss in a freely rotatable form; a rotational shaft co-rotationally coupled with the revolving scroll via a revolving-radius variable mechanism; a balance weight attached to the drive bush; and a float-protecting pin, a part of the back face of the head of the pin being in contact with the upper face of the balance weight, the shaft of this pin passing through a hole provided in the balance weight in a freely movable form, and an end part of the shaft being fixed to a larger-diameter portion at one end of the rotational shaft, said larger-diameter portion existing at the drive bush side. In the above structure, a part of the head of the pin, said part existing at the side of the drive bush, is cut. Accordingly, the attachment position of the pin can be closer to the drive bush side, the size of the structure in an area neighboring the pin can be reduced, and the diameter of the shaft of the pin can become larger so as to strengthen the shaft.

REFERENCES:
patent: 5458472 (1995-10-01), Kobayashi et al.
patent: 5531578 (1996-07-01), Takemoto et al.
patent: 5542830 (1996-08-01), Yuzaki

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