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. 16, 1986
Filed:
Jan. 10, 1986
Applicant:
Inventors:
Karsten Laing, 7148 Remseck a.N.2, DE;
Oliver Laing, 7148 Remseck a.N.2, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F24D / ;
U.S. Cl.
CPC ...
237 / ; 236 / ; 236 / ; 318812 ; 417420 ;
Abstract
An electric-motor-driven circulating pump for heating systems reduces power consumption of the motor, whereby the reduction ensues by means of periodic interruption of a line feed by means of electronic switch means so that switch-on and pause intervals follow one another. The switch means interrupt or close current flow at a zero-axis crossing of the voltage of the line feed.