Compressor assembly

Details Compressor assembly Compressor assembly

2001-12-06

2004-01-13

Yu, Justine R. (Department: 3746)

Pumps

Combined

C418S061200, C418S116000, C418S225000

Reexamination Certificate

active

06676385

ABSTRACT:

FIELD OF THE INVENTION
A rotary device containing a housing having a curved inner surface with a profile equidistant from a trochoidal curve, an eccentric mounted on a shaft disposed within the housing, a rotor mounted on the eccentric shaft which contains at least three faces, a partial bore located at the intersection of adjacent faces, and at least three rollers rotatably mounted within the partial bores of the roller. The rotor is comprised of a front face, a back face, a first side, a second side, and a third side. On each front and back face, between adjacent sides, an opening is formed.
BACKGROUND OF THE INVENTION
In applicants' U.S. Pat. No. 5,1131,551, there is disclosed and claimed a rotary device comprised of a housing comprising a curved inner surface with a profile equidistant form a trochoidal curve, an eccentric mounted on a shaft disposed within said first housing, a first rotor mounted on said eccentric shaft which is comprised of a first side, a second side, and a third side, a first partial bore disposed at die intersection of said first side and said second side, a second partial bore disposed at the intersection of said second side and said third side, a third partial bore disposed at the intersection of said third side and said first side, a first solid roller disposed fluid rotatably mounted within said first solid bore, a second solid roller disposed and rotatably mounted within said second partial bore, and a third solid roller disposed and rotatably mounted within said third pairtial bore. The rotor is comprised of a front face, a back face, a first side, a second side, and a third side, wherein a first opening is formed between and communicates between said front face and said first side, a second opening is formed between and communicates between said back face and said first side, wherein each of said first opening and said second opening is substantially equidistant and symmetrical between said first partial bore and said second partial bore, a third opening is formed between and communicates between said front face and said second side, a fourth opening is formed between and communicates between said back face and said second side, wherein each of said third opening and said fourth opening is substantially equidistant and symmetrical between said second partial bore and said third partial bore, a fifth opening is formed between and communicates between said front face and said third side, and a sixth opening is formed between and communicates between said back face and said third side, wherein each of said fifth opening and said sixth opening is substantially equidistant and symmetrical between said third partial bore and said first partial bore. Each of said first partial bore, said second partial bore, and said third partial bore is comprised of a centerpoint which, as said rotary device rotates, moves along said trochoidal curve. Each of said first opening, said second opening, said third opening, said fourth opening, said fifth opening, and said sixth opening has a substantially U-shaped cross-sectional shape defined by a first linear side, a second linear side, and an arcuate section joining said first linear side and said second linear side, wherein said first linear side and said second linear side are disposed with respect to each other at an angle of less than ninety degrees, and said substantially U-shaped cross-sectional shape has a depth which is at least equal to its width. The diameter of said first solid roller is equal to the diameter of said second solid roller, and the diameter of said second solid roller is equal to the diameter of said third solid roller. The widths of each of said first opening said second opening, said third opening, said fourth opening, said fifth opening, and said sixth opening are substantially the same, and the width of each of said openings is less than the diameter of said first solid roller. Each of said first side, said second side, and said third side has substantially the same geometry and size and is a composite shape comprised of a first section and a second section, wherein said first section has a shape which is different from said second section.
A similar patent, U.S. Pat. No. 6,301,898, issued to applicants' on Oct. 16, 2001. This patent discloses and claims a rotary device comprised of a housing comprising a curved inner surface with a profile equidistant from a trochoidal curve, an eccentric mounted on a shalt disposed within said housing, a first rotor mounted on said ecceitric which is comprised of a first side, a second side, and a third side, a first partial bore disposed at the intersection of said first side and said second side, a second partial bore disposed at the intersection of said second side and said third side, a third partial bore disposed at the intersection of said third side and said first side, a first hollow roller disposed and rotatably mounted within said first solid bore, a second hollow roller disposed and rotatably mounted within said second partial bore, and a third hollow roller disposed and rotatably mounted within said third partial bore, wherein: (a) said rotor is comprised of a front face, said back face, said first side, said second side, and said third side, wherein: 1. a first opening is formed between and communicates between said front face and said first side, 2. a second opening is formed between and communicates between said back face and said first side, wherein each of said first opening and said second opening is substantially equidistant and symmetrical between said first partial bore and said second partial bore, 3. a third opening is formed between and communicates between said front face and said second side, 4. a fourth opening is formed between and communicates between said back face and said second side, wherein each of said third opening and said fourth opening is substantially equidistant and symmetrical between said second partial bore and said third partial bore, 5. fifth opening is formed between and communicates between said front face and said third side, and 6. a sixth opening is formed between and communicates between said back face and said third side, wherein each of said fifth opening and said sixth opening is substantially equidistant and symmetrical between said third partial bore and said first partial bore; (b) each of said first partial bore, said second partial bore, and said third partial bore is comprised of a centerpoint which, as said rotary device rotates, moves along said trochoidal curve; (c) each of said first opening, said second opening, said third opening, said fourth opening, said fifth opening, and said sixth opening has a substantially U-shaped crosssectional shape defined by a first linear side, a second linear side, and an arcuate section joining said first linear side and said second linear side, wherein: 1. said first linear side and said second linear side are disposed with respect to each other at an angle of less than ninety degrees, and 2. said substantially U-shaped cross-sectional shape has a depth which is at least equal to its width; (d) the diameter of said first hollow roller is equal to the diameter of said second hollow roller, and the diameter of said second hollow roller is equal to the diameter of said third hollow roller; (e) the widths of each of said first opening said second opening, said third opening, said fourth opening, said fifth opening, and said sixth opening arc substantially the same, and the width of each of said openings is less than the diameter of said first hollow roller; and (f) each of said first side, said second side, and said third side has substantially the same geometry and size and is a composite shape comprised of a first section and a second section, wherein said first section has a shape which is different from said second section. The entire disclosure of each of U.S. Pat. Nos. 5,431,551 and 6,301,898 is hereby incorporated by reference into this specification.
The compressors of U.S. Pat. Nos. 5,431,551 and 6,301,898, although substantial better tha

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