Patent ID: 7249556

Claim:
A compressor, comprising: a cylinder block; a cylinder head mounted adjacent said cylinder block; a bolt mounting said cylinder head adjacent said cylinder block; a piston channel formed in said cylinder block, said piston channel having a wall integrally formed with said cylinder block, and a cooling chamber formed in said cylinder block adjacent said piston channel for accommodating a fluid; a crankcase and said cylinder block are formed as a unitary monoblock, a crankshaft at least partially disposed in said crankcase; and a piston coupled to said crankshaft and slidably disposed in said piston channel, said piston having a contact portion for contacting the wall of said piston channel as said piston slides from a highest position to a lowest position; wherein said bolt and said cooling chamber each extend from at least the point of contact between the contact portion of said piston and the wall of said piston channel when said piston is in the highest position to at least the point of contact between the contact portion of said piston and the wall of said piston channel when said piston is in the lowest position.