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:
Apr. 29, 1980
Filed:
Oct. 11, 1978
Siegfried Anderl, Amstetten, DE;
Wurttembergische Metallwarenfabrik, Geislingen, DE;
Abstract
A coffee machine comprising a pressure-tight boiler having a hot water tank and a cold water tank having a volume at least about half the volume of said hot water tank, a heater located in the hot water tank, a filter chamber, a discharge line connected to the filter chamber, an ascending tube running from the bottom of the hot water tank to the inlet end of said discharge line, hot water being forced up through said ascending tube after heating of the water by a buildup of pressure in said boiler, the hot water passing into the discharge line and to the filter chamber, said cold water tank communicating with said hot water tank in an upper region of said boiler and also through a connection near the bottom thereof so that as the hot water is forced out of the hot water tank, cold water will flow into the hot water tank from the cold water tank, the connection controlling the quantity of cold water supplied to thereby controlling the maximum temperature of the hot water and substantially preventing heat from penetrating into said cold water through convection.