Cleaning and liquid contact with solids – Processes – Combined
Patent
1994-12-19
1996-06-11
Silbaugh, Jan H.
Cleaning and liquid contact with solids
Processes
Combined
134 21, 134 252, 134 253, B08B 704
Patent
active
055251617
ABSTRACT:
The operational process includes a step in which water is let into a collecting sump (5) up to a static level (L) . The water is then sprayed onto the washload through appropriate spray means (8, 13) that are supplied by a pump (7) having a suction mouth (11) whose top portion is situated at a level (H). The water is sprayed in an intermittent manner through a sequence of alternating spray periods (T) and pause periods (Tp) during which the pressure of the water downstream of the pump (7) is at its maximum (P1) and at its minimum (Pm), respectively. Each spray period (T) has a duration that is equal to the time needed for the water in the sump (5) to sink from the static level (L) to the level (H) of the pump suction mouth (11). Each pause period (Tp) has a duration that is equal to the time needed for the water in the sump (5) to rise again from the level (H) up to or nearly up to the static level (L).
REFERENCES:
patent: 3664159 (1972-05-01), Mazza
patent: 4810306 (1989-03-01), Noren
patent: 4872466 (1989-10-01), Noren
patent: 5211189 (1993-05-01), Santarossa
patent: 5223042 (1993-06-01), Milocco
patent: 5264043 (1993-11-01), Milocco
patent: 5330580 (1994-07-01), Whipple, III et al.
Filippetti Mario
Milocco Claudio
Chaudhry Saeed T.
Silbaugh Jan H.
Zanussi Elettrodomestici S.p.A.
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