F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent
F - Mech Eng,Light,Heat,Weapons
16
J
277/15
F16J 15/16 (2006.01) F01C 19/08 (2006.01)
Patent
CA 1199655
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 sealing 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.
410687
American Standard International Inc.
Fetherstonhaugh & Co.
Trane Canada Inc.
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