US Patent 7654034 Apparatus for capturing and entrapping an insect

A device for entrapping an insect includes a hollow cylinder, a piston located in the cylinder and sealed at an inner surface of the cylinder, a spring for urging the piston to move axially in the cylinder; and a releasable latch for securing the piston in an armed state, wherein the spring applies a force tending to move the piston axially and for releasing the piston from the armed state to produce a partial vacuum. A disposable cartridge containing an adherent able to entrap an insect pneumatically communicates with the suction side of the cylinder.