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:
Nov. 03, 1981
Filed:
Nov. 05, 1979
Applicant:
Inventors:
Basil M Wright, Rickmansworth, Hertfordshire, GB;
Thomas P Jones, Sully, Glamorgan, GB;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73 23 ; 7386302 ; 7386462 ; 128719 ; 128730 ;
Abstract
A breath sampling device in which a main flow tube through which a subject blows is provided with a venturi restriction. The main flow tube communicates through a passage at the restriction to pressure sensing, constituent sensing, and expansible sample collecting chamber. A control responsive to pressure change delays the operation of the sampler and sensor until breath flow rate diminishes, thus insuring that sampling and sensing occur near the end of expiration.