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:
Mar. 06, 2018
Filed:
Mar. 04, 2015
Douglas C. Heiderman, Akron, NY (US);
Ashwini K. Sinha, East Amherst, NY (US);
Paul Crvelin, Grand Island, NY (US);
Andrew Vassallo, Lancaster, NY (US);
Douglas C. Heiderman, Akron, NY (US);
Ashwini K. Sinha, East Amherst, NY (US);
Paul Crvelin, Grand Island, NY (US);
Andrew Vassallo, Lancaster, NY (US);
PRAXAIR TECHNOLOGY, INC., Danbury, CT (US);
Abstract
A modified vacuum actuated valve assembly and sealing mechanism is provided for improved sub-atmospheric flow stability characterized by the absence of delivery pressure spikes and flow excursions. The valve assembly includes a non-stationary thermoplastic seat and a stabber. The stabber is characterized by a top portion having a circular periphery designed to mechanically engage and disengage with an inner sealing surface of the thermoplastic seat. The sealing surface is coined to eliminate surface irregularities contained therein, thereby producing a relatively smooth coined mating inner sealing surface for the circular top portion of the stabber. The valve assembly also includes a modified bellows capable of fine tuning the delivery pressure of the valve assembly.