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:
Sep. 08, 1987
Filed:
Feb. 10, 1986
William J Eberle, Irving, TX (US);
Other;
Abstract
A switch responsive to fluctuations in the level of a vacuum. A ball is contained in an upright chamber and is normally in contact with an actuating means in the chamber. The actuating means is normally biased to one position but is shifted by the weight of the ball to another position. The chamber is connected to the vacuum source so as to apply a lifting suction force to the ball. If the suction force exerted by the vacuum exceeds a predetermined level, the ball will be lifted from the actuating means thereby shifting the position of the actuating means and generating a signal indicative of the vacuum level. Means are provided to adjust the level of vacuum necessary to lift the ball from the actuating means.