Positive displacement rotary mechanism
AssigneeGeneral Motors Corporation
InventorConstantinos A. Koromilas
Life of this patent
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Abstract
A positive displacement rotary mechanism has three and alternatively four identical rotary helical intermeshing lobes that cooperate with a stationary cylindrical member extending centrally thereof to define a repetitive working space internal of the lobes having boundaries along and between the lobes and along and between the lobes and the cylindrical member which boundaries move on rotation of the lobes to effect expansion and contraction of the working space while repetitively moving same from one of the ends of the lobes toward their other end.
Claims2
A positive displacement rotary mechanism comprising at least three and no more than four essentially identical rotary helical intermeshing lobes with parallel axes and identical helical surfaces extending between axially spaced ends thereof, a stationary concave sided cylindrical member extending centrally of said lobes and parallel to said axes, said helical surfaces having a varying pitch and a cross sectional profile as viewed axially having at least two convex circular apexes joined by convex circular sides such that said helical surfaces cooperate through close apex-to-side and apex-to-apex relationships therebetween and also cooperate with said cylindrical member through close apex relationship therewith to define a repetitive working space internal of said lobes having boundaries along and between said lobes and along and between said lobes and said cylindrical member which boundaries move on rotation of said lobes to effect expansion and contraction of said working space while repetitively moving same from one of said ends of said lobes toward the other end, and said stationary member having an exhaust passage extending therethrough with an opening to said working space.
A positive displacement rotary mechanism comprising at least three and no more than four essentially identical rotary helical intermeshing lobes with parallel axes and identical helical surfaces extending between axially spaced ends thereof, a stationary concave sided cylindrical member extending centrally of said lobes and parallel to said axes, said helical surfaces having a varying pitch and a cross sectional profile as viewed axially having at least two convex circular apexes joined by convex circular sides such that said helical surfaces cooperate through close to apex-to-side and apex-to-apex relationships therebetween and also cooperate with said cylindrical member through close apex relationship therewith to define a repetitive working space internal of said lobes having boundaries along and between said lobes and along and between said lobe and said cylindrical member which boundaries move on rotation of said lobes to effect expansion and contraction of said working space while repetitively moving same from one of said ends of said lobes toward the other end, said stationary member having ignition spark means open to said working space, and said stationary member further having a fuel supply passage extending therethrough with an opening to said working space.
Dependencies are inferred from the claim text.