Patent ID: 6848893

Claim:
A check valve for a compressor having high and low pressure chambers and highly pressurized liquid, the check valve comprising: a) a separation base located between the high and the low pressure chambers and having a ventilation pore; b) a valve bolt cover connected to the separation base and having: i) a valve bolt insertion hole communicating with the ventilation pore; ii) a pressure conduction hole located in a side of the valve bolt insertion hole and communicating with an exterior of the valve bolt cover, the pressure conduction hole being spaced apart from a top of the valve insertion hole; and iii) a buffer section being a portion of an interior of the valve bolt insertion hole between the pressure conduction hole and the top of the valve insertion hole; c) a passage located between the separation base and the valve bolt cover; and d) a valve bolt inserted into the valve bolt insertion hole and movable between a first position and a second position, wherein: i) in the first position, the valve bolt is located adjacent to the separation base sealing the ventilation pore and highly pressurized liquid flows into the buffer section via the pressure conduction hole and ii) in the second position, the valve bolt is spaced apart from the separation base and seals the pressure conduction hole, highly pressurized liquid in the buffer section buffers impact between the valve bolt and the valve bolt cover, and highly pressurized liquid flows through the ventilation pore to the high pressure chamber via the passage.