Liquid purification or separation – With repair or assembling means – Hoist or handle means
Patent
1997-10-20
1999-03-30
Lithgow, Thomas M.
Liquid purification or separation
With repair or assembling means
Hoist or handle means
210474, 210478, 210479, 99295, 24 20R, 24 20S, B01D 29085
Patent
active
058883924
ABSTRACT:
The present invention relates to filters for coffee, tea, hot chocolate etc., in which a filter is placed in a cylindrical container and whatever is to be filtered is placed in the filter that has been placed in the cylindrical container. Thereafter, either hot or ice cold water, in the case of iced tea, is poured into the cylindrical container over that which is to be filtered. In more cases than not, the filter collapses, especially in the case of coffee and tea, the result is that coffee grinds and tea leaves eventually get into the coffee cup or tea leaves get into the tea cup. The present invention solves this problem by providing a retention ring of shape retaining inert material, such as plastic or stainless steel that is capable of being compressed in size placing it inside the filter that has been placed in the cylindrical container that is to be filled with a product. The retention ring, when released from compression, returns to its original shape and holds the filter tight against the walls of the cylindrical container, thereby eliminating the contamination in the user's cup.
REFERENCES:
patent: D317388 (1991-06-01), White
patent: D322735 (1991-12-01), Morton
patent: D341059 (1993-11-01), Watson
patent: D349833 (1994-08-01), Enos
patent: 4656932 (1987-04-01), Kopp
patent: 4885987 (1989-12-01), Franke
patent: 5252211 (1993-10-01), Searfoss
patent: 5507948 (1996-04-01), Wargo
patent: 5536393 (1996-07-01), Weeks
Lithgow Thomas M.
Miller Alfred E.
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