초록 ▼

An apparatus periodically samples fluid flowing across a surface by providing a plate for mounting flush with the surface. The plate has an aperture extending there through and a tubular body extends from the around the aperture with a passage in communication with the aperture. A sample collection

An apparatus periodically samples fluid flowing across a surface by providing a plate for mounting flush with the surface. The plate has an aperture extending there through and a tubular body extends from the around the aperture with a passage in communication with the aperture. A sample collection vessel is removably attached to the body to receive fluid passing through the aperture and the passage. A valve member closes the aperture and moves when driven by an electromechanical device. The electromechanical device operates the valve member to alternately open and close the aperture during a defined sampling time to acquire a plurality of samples of the fluid flowing across the surface.

대표청구항 ▼

[ We claim:] [1.] An apparatus for sampling fluid flowing across a surface, said apparatus comprising:a plate for mounting in the surface, wherein the plate has opposed first and second surfaces with an aperture extending between the first and second surfaces;a first housing extending from the secon

[ We claim:] [1.] An apparatus for sampling fluid flowing across a surface, said apparatus comprising:a plate for mounting in the surface, wherein the plate has opposed first and second surfaces with an aperture extending between the first and second surfaces;a first housing extending from the second surface of said plate and having a passage in communication with the aperture, said first housing has a hole therethrough;a vessel removably attached to said first housing to receive fluid passing through the aperture and the passage;a valve member within said first housing for opening and closing the aperture to fluid flow;a second housing extending around said first housing and creating a chamber; anda mechanism within said second housing for operating said valve member to intermittently open and close the aperture in said plate, said mechanism comprising a lever extending through the hole in the first housing and engaging said valve member, a solenoid in the chamber and connected to said lever to produce movement of said valve member to open and close the aperture in said plate, and a control circuit having a timer for energizing the solenoid.