Infusion brewer and closed loop filter thereof
View Patent ↗The infusion brewer has a filter path forming a continuous loop around a plurality of rotary shafts, the plurality of rotary shafts being operable to cycle a continuous loop filter along the filter path, the filter path having a steeping area; and an infusion enclosure having a bottom opening positionable into an infusion position against the continuous loop filter at the steeping area.
1. An infusion brewer comprising:
a filter path forming a continuous loop around a plurality of rotary shafts, the plurality of rotary shafts being operable to cycle a continuous loop filter along the filter path, the filter path having a steeping area and surrounding a vacuum chamber;
an infusion enclosure having a bottom opening positionable into an infusion position against the continuous loop filter at the steeping area; and
a filter support having an infusion aperture at the steeping area, wherein the filter support is provided in the form of an upper wall of the vacuum chamber;
wherein, in the infusion position, the continuous loop filter is sandwiched between the infusion enclosure and a portion of the filter support surrounding the infusion aperture,
wherein the filter path has a corner edge around a corresponding one of the rotary shafts following the steeping area, the corner edge leading to a first chicane portion formed with at least two further ones of the rotary shafts in a sequence of an outer radius, an inner radius, and a second outer radius;
wherein the filter path further has a second chicane portion around at least three corresponding ones of the rotary shafts following the first chicane portion,
wherein the first chicane portion and the second chicane portion form opposite laterally-opened V-shapes, and
wherein a driving one of the rotary shafts is engaged internally with the filter path between the first chicane portion and the second chicane portion.
2. The infusion brewer of claim 1 wherein the driving one of the rotary shafts is engaged with the continuous loop filter.
3. The infusion brewer of claim 1 wherein the driving one of the rotary shafts has a gear wheel engaged with mating apertures in the continuous loop filter.
4. The infusion brewer of claim 3 wherein the driving one of the rotary shafts has two gear wheels, one on each opposite longitudinal end thereof.
5. The infusion brewer of claim 1 wherein the filter path surrounds the infusion aperture.
6. The infusion brewer of claim 1 wherein at least two of the rotary shafts of the first chicane portion have a roller which is wrapped by the filter path around more than a quarter of its circumference.
7. The infusion brewer of claim 1 further comprising a controller for controlling admission of particulate matter and hot water into the infusion enclosure in the infusion position, for the particulate matter to be steeped with hot water into an infusion in the infusion enclosure and the infusion to be subsequently separated from used particulate matter across a corresponding portion of the continuous loop filter and the infusion aperture, and controlling the cycling of the continuous loop filter along a portion of the continuous loop filter subsequently to said processing.
8. The infusion brewer of claim 7 wherein the controller further controls the movement of said infusion enclosure away from the filter support subsequently from said steeping and prior to said cycling, to allow evacuation of used particulate material from the steeping area.
9. The infusion brewer of claim 1 wherein the continuous loop filter has at least one row of apertures regularly interspaced from one another along an edge thereof.
10. The infusion brewer of claim 1 wherein the continuous loop filter has a coating along an edge thereof.