Multiple stage compressor with rotors using rollers

A hermetic compressor assembly, comprised of a hermetic casing and disposed therein a guided rotor compressor assembly, wherein said guided rotor compressor assembly is comprised of a housing comprising a curved inner surface with a profile equidistant from a trochoidal curve, an eccentric mounted on a shaft disposed within said 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 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 roller disposed and rotatably mounted within said first partial bore, a second roller disposed and rotatably mounted within said second partial bore, and a third roller disposed and rotatably mounted within said third partial bore, wherein said rotor is comprised of a front face, a back face, said first side, said second side, and said third side, and wherein:

• (a) a first opening is formed between and communicates between said front face and said first side,
• (b) 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,
• (c) a third opening is formed between and communicates between said front face and said second side,
• (d) 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,
• (e) a fifth opening is formed between and communicates between said front face and said third side, and
• (f) 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;
• (g) 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;
• (h) 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:
• 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;
• (i) the diameter of said first roller is equal to the diameter of said second roller, and the diameter of said second roller is equal to the diameter of said third roller;
• (j) 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 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.

A compound compressor assembly comprised of a guided rotor compressor assembly coupled to a non-guided rotor compressor assembly, wherein said guided rotor compressor assembly is comprised of a housing comprising a curved inner surface with a profile equidistant from a trochoidal curve, an eccentric mounted on a shaft disposed within said 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 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 roller disposed and rotatably mounted within said first partial bore, a second roller disposed and rotatably mounted within said second partial bore, and a third roller disposed and rotatably mounted within said third partial bore, and wherein:

• (a) said rotor is comprised of a front face, a 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. a 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 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:
• 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 roller is equal to the diameter of said second roller, and the diameter of said second roller is equal to the diameter of said third 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 are substantially the same, and the width of each of said openings is less than the diameter of said first 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.