Beverage maker
First Claim
1. A beverage maker including a cylindrical chamber having a closed end, a pouring spout and a separator piston disc which is slidable within the cylindrical chamber, the separator piston disc being permeable to water and the beverage whilst being impenetrable to solid raw material from which the beverage is made, the arrangement being such that the solid raw material is placed in the cylindrical chamber and the cylindrical chamber is filled with hot water which interacts with raw material to form the beverage, there being a screw which is coupled with the separator piston disc and which is supported substantially coaxially within the cylindrical chamber for rotation about its axis relative to the cylindrical chamber so that the separator piston disc moves within the cylindrical chamber with rotation of the screw and means operable to turn the screw whereby the separator piston disc is driven within the cylindrical chamber to separate the residue of the raw material from the resultant beverage, wherein the pouring spout is spaced from the closed end, the separator piston disc is slidable within the cylindrical chamber between the pouring spout and the closed end and is adapted to be driven towards the closed end, the solid raw material being placed in the cylindrical chamber between the closed end and the separator piston disc, and the screw has a multistart thread.
2 Assignments
0 Petitions
Accused Products
Abstract
A coffee maker includes an open topped jug which is a plastics molding. It has a lid which carries a rotary cap from which a leadscrew depends. The leadscrew has a four start thread. A nut member is screw-fitted onto the leadscrew and is part of a one-piece plastics molding which carries and supports an annular separator disc which is heat formed from a thin plastics mesh material. The separator disc comprises a major planar portion and a flared circumferential portion which presents an annular concave surface to the base of the jug. A rod depends from the lid and is a sliding fit in an aperture in the planar portion of the separator disc. The separator disc is driven towards the base by turning the rotary cap and the leadscrew with it. The rod prevents the separator disc from rotating with the leadscrew.
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Citations
21 Claims
- 1. A beverage maker including a cylindrical chamber having a closed end, a pouring spout and a separator piston disc which is slidable within the cylindrical chamber, the separator piston disc being permeable to water and the beverage whilst being impenetrable to solid raw material from which the beverage is made, the arrangement being such that the solid raw material is placed in the cylindrical chamber and the cylindrical chamber is filled with hot water which interacts with raw material to form the beverage, there being a screw which is coupled with the separator piston disc and which is supported substantially coaxially within the cylindrical chamber for rotation about its axis relative to the cylindrical chamber so that the separator piston disc moves within the cylindrical chamber with rotation of the screw and means operable to turn the screw whereby the separator piston disc is driven within the cylindrical chamber to separate the residue of the raw material from the resultant beverage, wherein the pouring spout is spaced from the closed end, the separator piston disc is slidable within the cylindrical chamber between the pouring spout and the closed end and is adapted to be driven towards the closed end, the solid raw material being placed in the cylindrical chamber between the closed end and the separator piston disc, and the screw has a multistart thread.
- 14. A beverage maker which includes a chamber having a closed end, a pouring spout spaced from the closed end and a separator piston disc which is provided with a seal around its periphery and which is slidable within the chamber between the pouring spout and the closed end, the separator piston disc being permeable to water and the beverage whilst being impenetrable to solid raw material from which the beverage is made and being adapted to be driven towards the closed end of the chamber, the seal being operable co-operative with the sides of the chamber so as to seal against passage of the raw material between the disc and the sides of the chamber from below the disc, the arrangement being such that the solid raw material is placed in the chamber between the closed end and the separator piston disc and the chamber is filled with hot water which interacts with raw material to form the beverage, the separator piston disc being driven towards the closed end to separate the residue of the raw material from the resultant beverage, wherein the separator piston disc and the peripheral ring seal are formed as a one-piece mesh disc having a major portion and a flared circumferentially extending peripheral portion which serves as the peripheral ring seal portion, the peripheral edge of the one-piece mesh disc being is sliding contact with the inner surface of the chamber wall and being displaced axially with respect to the major planar portion so that it is nearer to the base of the chamber than is that major planar portion.
- 19. A separator piston disc and peripheral ring seal for slidably fitting in a cylindrical chamber of a beverage maker, the disc and peripheral ring seal having a major planar portion which incorporates mesh material and a flared circumferentially extending peripheral portion which serves as the peripheral ring seal portion for sliding contact with the inner surface of the wall of the cylindrical chamber, wherein the piston disc and peripheral ring seal are formed together as a one-piece disc of mesh material, the arrangement being such that, when the one-piece mesh disc is fitted into the closed ended cylindrical chamber of a beverage maker, its peripheral edge is displaced axially with respect to the major planar portion, being nearer to the closed end of the cylindrical chamber than is that major planar portion.
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21. A beverage maker including an open topped vessel forming a generally cylindrical chamber having a closed end, a pouring spout spaced from the closed end, a lid for fitting to the open top whereby to enclose the interior of the vessel and a separator piston disc which is slidable within the cylindrical chamber between the pouring spout and the closed end, the separator piston disc having a planform profile similar to that of the base and being permeable to water and the beverage whilst being impenetrable to sold raw material from which the beverage is made, and means for driving the disc towards the closed end of the cylindrical chamber, the arrangement being such that the solid raw material is placed in the cylindrical chamber between the closed end and the separator piston disc and the cylindrical chamber is filled with hot water which interacts with raw material to form the beverage, the separator piston disc being driven towards the closed end to separate the residue of the raw material from the resultant beverage, wherein said means for driving the disc towards the closed end of the cylindrical chamber include a screw which depends from the lid by which it is supported for rotation about its axis relative to the lid, the disc being formed as a nut which is in screwthreaded engagement with the screw so that it slides within the vessel with rotation of the screw and an elongate member depends from the lid through an aperture in the disc substantially parallel to the screw, the lower end of the elongate member being a sliding fit in the aperture of the disc.
Specification