Brewer
First Claim
1. A brewer comprising a first upright cylindrical tube having an upper portion with a smooth inner wall surface and an open top, a second cylindrical tube slidable within the first cylindrical tube and including a filter means at the top end portion thereof and a smooth inner wall surface, annular gasket means about the periphery of the top end of the second cylindrical tube in sealing contact with the inner wall surface of the first cylindrical tube, motor means for moving the second cylindrical tube and the filter means axially within the first tube, a piston head provided within the second cylindrical tube and stationary relative to the first tube and including annular gasket means about the periphery thereof in sealing contact with the inner wall surface of the second cylindrical tube, a pour spout defined in the wall of the second cylindrical tube spaced axially from the top end thereof a distance such that the spout is below the piston head during most of the travel of the second cylindrical tube and is above the piston head when the filter is near the top of its travel, whereby water and infusible alimentary grounds can be poured into the open end of the first cylindrical tube above the filter means when the filter means and the second cylindrical tube are in a position intermediate the top end of the first cylindrical tube and the piston head and whereby the second cylindrical tube including the filter means is initially moved in a first axial direction towards the piston head whereby air trapped between the filter means and the piston head is forced through the filter means to create turbulence in the mixture and then the second cylindrical tube is moved upwardly towards the top end of the first cylindrical tube whereby the solution will pass through the filter under negative pressure and eventually through the spout.
4 Assignments
0 Petitions
Accused Products
Abstract
A brewer for providing a single cup of coffee which comprises an outer cylindrical tubular member having an open top and a platform formed on the top. A slidable second cylindrical tubular member reciprocates within the first tubular member along the axis thereof and is provided with a gasket at the top thereof in sealing contact with the inner surface of the first tubular member. A permanent filter is provided at the top of the second cylindrical tubular member. A fixed piston head is located within the second cylindrical tubular member and is fixed relative to the first tubular member. A wiper is provided on the top platform of the first tubular member such that when the filter is in its uppermost position, the wiper can be activated to clean the coffee grounds from the filter. A pour spout is provided in the second cylindrical member which communicates with the fluid once the pour spout is above the level of the piston head. In operation, the filter moves downwardly towards the piston head such that air passes upwardly through the water and coffee grounds on the filter to agitate the mixture and then upwardly towards the top of the first tubular member such that a negative pressure is created between the filter and the piston head to draw the solution through the filter and eventually out by means of the spout in the wall of the second cylindrical tubular member.
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Citations
10 Claims
- 1. A brewer comprising a first upright cylindrical tube having an upper portion with a smooth inner wall surface and an open top, a second cylindrical tube slidable within the first cylindrical tube and including a filter means at the top end portion thereof and a smooth inner wall surface, annular gasket means about the periphery of the top end of the second cylindrical tube in sealing contact with the inner wall surface of the first cylindrical tube, motor means for moving the second cylindrical tube and the filter means axially within the first tube, a piston head provided within the second cylindrical tube and stationary relative to the first tube and including annular gasket means about the periphery thereof in sealing contact with the inner wall surface of the second cylindrical tube, a pour spout defined in the wall of the second cylindrical tube spaced axially from the top end thereof a distance such that the spout is below the piston head during most of the travel of the second cylindrical tube and is above the piston head when the filter is near the top of its travel, whereby water and infusible alimentary grounds can be poured into the open end of the first cylindrical tube above the filter means when the filter means and the second cylindrical tube are in a position intermediate the top end of the first cylindrical tube and the piston head and whereby the second cylindrical tube including the filter means is initially moved in a first axial direction towards the piston head whereby air trapped between the filter means and the piston head is forced through the filter means to create turbulence in the mixture and then the second cylindrical tube is moved upwardly towards the top end of the first cylindrical tube whereby the solution will pass through the filter under negative pressure and eventually through the spout.
Specification