| 摘要 |
A check valve comprising a poppet (30) urged by a conical spring (50) to annularly seal uniformly around its entire periphery to assure more uniform cracking pressure about its entire periphery. To insure uniform sealing of the poppet (30) against a seat (36) the conical spring (50) has a smallest coil (50S) in engagement with a center protrusion (42) of the poppet (30) to permit the protrusion (42) to pivot relative to the conical spring (50). |
