Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1985-06-14
1987-05-19
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
418150, 291564R, F01C 104, F01C 2108, B23P 904, B23P 1500
Patent
active
046663800
ABSTRACT:
A scroll type fluid machine comprising a pair of mutually engaged scroll members each including a side plate and a spiral lap uprightly disposed on an inside surface of the side plate; when the scroll members are relatively resolved in solar motion relationship, a fluid volume in sealed chambers defined by the pair of engaged scroll members being varied, so that a pressure of the fluid in the sealed chambers is thereby varied in order to discharge a gas therefrom, characterized by constituting so that stress may not concentrate at stress concentration portions of the scroll members, i.e., at corners of inner end base portions of the laps and the inside surfaces of the side plates in an eddy center section of the scroll members; and a method for forming the scroll members which permit improving productivity, characterized by forming, at the stress concentration portion of each scroll member, a round having a relatively large curvature radius which is enough to provide it with fatigue strength, and then finishing a relatively small round by means of a cutter for finish working.
REFERENCES:
patent: 4490099 (1984-12-01), Terauchi et al.
patent: 4547137 (1985-10-01), Terauchi et al.
patent: 4594061 (1986-06-01), Terauchi
Fukami Shoji
Hirano Takahisa
Itoh Takuyuki
Maruiwa Yasuharu
Mukai Masatoshi
Mitsubishi Jukogyo Kabushiki Kaisha
Vrablik John J.
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