Low-cost, in-line trigger operated pump sprayer

摘要

A low-cost, in-line trigger actuated pump sprayer has a pump body (11) which may have an integral container closure (24) and/or integral shroud cover (26) with a trigger lever trunnion mounted to the pump body or with a trigger lever assembly (33) mounted to the pump body as including a living hinge (43). A hollow pump piston (13) defines a discharge passage (17) lying perpendicular to the central axis of the closure (24), and an elastomeric element (18) may be provided which functions as a piston return spring and inlet check valve spring.