Ernst Grunewald

40648877, Dec 27, 1977

Jul 27, 1976

5/708926

Paul B. Geiger - Troy OH
Ernst Grunewald - Troy OH
Ben J. Vallor - Troy OH

Hobart Corporation - Troy OH

B08B 302

134144

A rotating spray arm is supported by a removable and vertically adjustable upper rack of a dishwasher. The fluid coupling for the spray arm is not affected by changes in the upper rack vertical position. The spray arm is also protected by a guard which forms a stand for the rack when removed from the dishwasher.

40381030, Jul 26, 1977

Jul 27, 1976

5/709169

Ernst Grunewald - Troy OH

Hobart Corporation - Troy OH

B08B 302

134 10

Dishwasher pumping and filtering system provides for recirculation of filtered liquid in the form of either washing solution or rinse water, coupled with outside water-jet impingement flushing of filtered food particles from the filtering system and down a drain at the end of a washing or rinsing period while draining the liquid from the dishwasher.

61386928, Oct 31, 2000

Jan 22, 1999

9/236161

Duane M. Kobos - Laporte IN
Kenneth N. Whah - Porter IN
Tony L. Ellis - Bowling Green OH
Ernst Grunewald - Watervliet MI
Ralph E. Christman - Findlay OH

Whirlpool Corporation - Benton Harbor MI

B08B 920

134 252

A method for operating an automatic dishwasher in a manner to minimize the deposition of contaminants or filming on the dishes is provided. The present invention contemplates that objectionable filming on washed dishes or dishware items may occur if residual water left on the dishes at the end of the final drain step is not given a chance to drip off or drain from the dishware. The present invention provides for a drip period following the final drain step in the dishwashing cycle. The drip period provides an opportunity for gravity assisted draining or "drip-off" of residual water from the dishware items prior to evaporation such that the minute particles which are suspended in the residual water are not deposited onto the dishes. During the drip period, rapid evaporation of residual liquid from the dishware items is prevented. This is accomplished, in part, by keeping a vent aperture in the dishwasher door closed for a predetermined time after the final rinse such that the relative humidity remains high in the dishwasher tub and by delaying the energization of the heater such that evaporation is not promoted by the introduction of heat into the dishwasher tub.

40857611, Apr 25, 1978

Oct 6, 1976

5/730134

Ernst Grunewald - Troy OH

Hobart Corporation - Troy OH

B08B 302

134104

The drain filter has large inlet openings at a raised position and small inlet openings at its bottom, all shaped to cooperate with the dishwashing machine sump to form labyrinthine drainage passageways to stop debris exceeding an acceptable size. The drain filter is in two parts, a fixed portion and a removable portion, both of which provide these features. The large inlet openings into the removable portion of the drain filter are upwardly facing and on the downstream side of an elevated wall which forms a dam to stop dense objects from entering the filter. The total filter inlet area is small to maintain a high flow velocity to float softer and lighter items over the dam for removal from the dishwasher when it is drained. The small inlet openings drain the remaining fluid after the level falls below the large openings.