The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 01, 1991
Filed:
Mar. 13, 1990
Guenter Hohenberg, Graz, AT;
Heimo Denk, Graz, AT;
Abstract
A method and apparatus for controlling the volume stream of a sub-quantity which is continuously removed from a gas stream and which is supplied and mixed with a gaseous dilutant stream, the sub-quantity is conducted from the main stream through a back-up region where the control of the flow of sub-quantity without affecting its composition is effected by a counterflow in a back-up region which is controllably directed in opposition to the sub-quantity flow such as by an annular upstream directed gap surrounding the sub-quantity conduit or by openings which are directed in a direction against the sub-quantity flow or by a pipe directing a flow against the discharge end of the sub-quantity flow. The sub-quantity flow is mixed in a mixing tunnel with a dilution gas and a small quantity of this mixed gas is removed for testing.