Scroll type fluid displacement apparatus with an axial seal plat

Details Scroll type fluid displacement apparatus with an axial seal plat Scroll type fluid displacement apparatus with an axial seal plat

1996-10-17

1998-08-11

Vrablik, John J.

Rotary expansible chamber devices

Working member has planetary or planetating movement

Helical working member, e.g., scroll

418178, F01C 104

Patent

active

057918864

ABSTRACT:
A scroll type fluid displacement apparatus includes a pair of scrolls having a circular end plate and a spiral element extending from an axial end surface of the circular end plate. An involute slit is formed in an involute plate. The spiral elements are inserted into the involute slit so that the involute plate and axial end plate adjoin one another. The involute slit includes an inner edge, an outer edge and an extreme line joining the inner edge with the outer edge. A first radial gap is formed between the extreme line and radial ends of the spiral element. The first radial gap is greater than a second radial gap formed between the inner and outer edges of the radial ends of the spiral element. First portions of the inner edge and outer edge are prevented from contacting the end of a spiral element even if the end of the spiral element thermally expands more than other portions of the spiral element.

REFERENCES:
patent: 3986799 (1976-10-01), McCullough
patent: 4487560 (1984-12-01), Uchikawa et al.
patent: 4498852 (1985-02-01), Hiraga
patent: 4540355 (1985-09-01), Sakaki et al.
patent: 4645436 (1987-02-01), Sakamoto
patent: 4890987 (1990-01-01), Sato et al.
patent: 5122041 (1992-06-01), Yokota et al.

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