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:
Dec. 31, 1991
Filed:
Oct. 15, 1990
Pradip Choksi, Northridge, CA (US);
Rekha P Choksi, Northridge, CA (US);
Other;
Abstract
A device for limiting the applied vacuum in a fluid suctioning system comprising a chamber having an inlet at which a suction level or levels V.sub.x is or are to be maintained, and an outlet to which vacuum level V.sub.2 is applied, wherein V.sub.x <V.sub.2, fluid being sucked through the shapes via the inlet and outlet; an annular seat in the chamber, the chamber containing an upstream flow zone R.sub.1 between the inlet and the seat, and a downstream flow zone R.sub.2 between the seat and the outlet; and a diaphragm at the upstream side of the seat and extending crosswise thereof and crosswise of at least a portion of the zone R.sub.1, the diaphragm carried for movement toward the seat when the vacuum level in R.sub.1 rises to a predetermined level, to reduce or block fluid flow through the chamber, the diaphragm movable away from the seat when the vacuum level in R.sub.1 falls below a predetermined level.