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:
Aug. 09, 1977
Filed:
May. 06, 1976
Applicant:
Inventor:
John J Nolan, Cambridge, MA (US);
Assignee:
Sala Magnetics, Inc., Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F15D / ; F16L / ; F17D / ;
U.S. Cl.
CPC ...
1375 / ; 137844 ; 138 45 ;
Abstract
An air-precluding flow-regulating device for maintaining a predetermined flow rate through a conduit from a site of higher to a site of lower elevation, comprising: a section of normally collapsed soft resilient tube forming at least a part of the conduit and having a length at least as great as the variation in back pressure expressed in head at the site of lower elevation, said tube being disposed to contain the ambient pressure level within its length.