Rotary expansible chamber devices – Working member has planetary or planetating movement – Helical working member – e.g. – scroll
Patent
1981-10-29
1983-10-25
Vrablik, John J.
Rotary expansible chamber devices
Working member has planetary or planetating movement
Helical working member, e.g., scroll
418141, 418142, 277 57, 277133, 277204, F01C 102, F01C 1908, F16J 1516
Patent
active
044116055
ABSTRACT:
An involute and tip seal for use in a positive fluid displacement apparatus of the scroll type. A scroll machine wrap element of general spiral configuration about an axis includes a radially inner and outer flank surface terminating in a tip. In the tip, a groove is formed which runs in the longitudinal direction of the wrap element and substantially conforms to its spiral shape. A plurality of material strips, generally coaligned in parallel side-by-side relationship, are disposed within the spiral groove of the involute wrap. One or more of the strips includes a plurality of notches along at least one of the two axial edges. These notches, in conjunction with one or more of the adjacent strips and a flat surface against which the notched edge abuts, define a plurality of labyrinth pockets longitudinally spaced along the strips. The labyrinth surface improves both longitudinal and transverse fluid sealing of the involute tip seal.
REFERENCES:
patent: 801182 (1905-10-01), Creux
patent: 3185386 (1965-05-01), Peras
patent: 3392910 (1968-07-01), Tanzberger
patent: 3924977 (1975-12-01), McCullough
patent: 3994636 (1976-11-01), McCullough et al.
Anderson Ronald M.
Campbell Raymond W.
Lewis Carl M.
The Trane Company
Vrablik John J.
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