Patent ID: 7410079
Filing Date: 2008-08-12
Classification: B05B

Abstract:
1. An accumulator-type liquid sprayer comprising: a cylinder that can be secured to a mouth portion of a container containing a liquid to be sprayed, the cylinder having a suction port that is communicated with inside of the container; a hollow stem to which a pressurizing cap can be secured, the pressurizing cap being operable by a user for spraying the liquid from the container; a piston secured to the hollow stem and arranged in the cylinder so as to be slidable according to a pushing force from the hollow stem and a resilient force from a resilient means exerted in a direction opposite to the pushing force, the piston defining a space region within the cylinder; a stopper that is brought into contact with an end portion of the piston for restricting displacement of the piston as it is operated; a discharge valve for bringing the space region into communication with the internal passage of the hollow stem by a pushing movement of the piston, so that the liquid is discharged from the space region toward outside; and a suction valve for bringing the space region into communication with the suction port of the cylinder by a returning movement of the piston, so that the liquid is sucked into the space region, wherein the end portion of the piston is formed with an annular recess that extends along an outer peripheral edge of the end portion, and wherein the annular recess divides the end portion of the piston into a sliding surface slidably engageable with an inner wall surface of the cylinder and a contact surface that can be brought into contact with the stopper.