Google Patents US6422260B2 - Trap primerĭownload PDF Info Publication number US6422260B2 US6422260B2 US09/804,461 US80446101A US6422260B2 US 6422260 B2 US6422260 B2 US 6422260B2 US 80446101 A US80446101 A US 80446101A US 6422260 B2 US6422260 B2 US 6422260B2 Authority US United States Prior art keywords piston seat sealing surface trap primer passageway Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.