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:
Oct. 11, 1988
Filed:
Jun. 01, 1987
Michael V Waller, Newnan, GA (US);
David M Palance, Milford, NH (US);
LDI Pneutronics Corp., E. Pepperell, MA (US);
Abstract
A pneumatic circuit pressure control device including an electronic comparator for comparing a transducer generated pressure signal from the pneumatic circuit and a desired pressure signal from a desired pressure input generator. The comparison circuit selectively actuates a solenoid-actuated valve which controls the pressure in the pneumatic circuit. Preferably, the solenoid of the solenoid-actuated valve produces an electromagnetic field for electromagnetic induction of a circuit which oscillates the solenoid-actuated valve to produce a variable orifice-like effect when small changes in pressure are demanded by the comparator circuit.