Patent ID: 8517705

Claim:
A rotary apparatus, comprising: a rotor; a stator; a first end plate; said first end plate connecting said rotor to said stator; a second end plate, said second endplate connecting said rotor to said stator; and a vane, said vane separating said rotor and said stator, said vane further comprising: a leading vane side, at least a portion of said leading vane side proximate a leading expansion chamber, wherein during use, rotation of said rotor moves said vane toward the leading expansion chamber; a trailing vane side, at least a portion of said trailing vane side proximate a trailing expansion chamber, said vane rotationally leading said trailing expansion chamber during use; a first vane surface proximately contacting said first end plate; and a second vane surface proximately contacting said second end plate; and a rolling element, wherein said rolling element couples at least one of: said first vane surface to said first end plate; and said second vane surface to said second end plate.