Dispensing group for an espresso coffee machine with frontal insertion of the filter holder
A dispensing group for an espresso coffee machine is described. The group comprises: a coffee boiler configured to contain pressurized hot water; a supply duct for feeding hot water under pressure towards a puck of coffee powder; and a filter-holder support comprising guides ( 30 ) which form at least one sliding surface for slidably supporting a filter holder, wherein said filter-holder support is rotatable between a first position for inserting the filter holder and a second dispensing position and wherein said dispensing group comprises a mechanical locking device for locking the filter-holder support in the second dispensing position.
1. A dispensing group for an espresso coffee machine, wherein said group comprises:
a coffee boiler configured to contain pressurized hot water;
a supply conduit configured to feed hot water under pressure towards a puck of coffee powder; and
a filter-holder support comprising guides forming at least one sliding surface for slidably supporting a filter holder,
wherein said filter-holder support is rotatable between a first position for inserting the filter holder and a second dispensing position;
wherein said dispensing group comprises a mechanical locking device for locking said filter-holder support in said second dispensing position; and
wherein said filter-holder support comprises an elastic member for retaining the filter holder in a position at the bottom of a substantially semicircular housing.
2. The dispensing group according to claim 1 ,
wherein the coffee boiler is at least partially comprised of a heat conducting material,
wherein the filter-holder support is at least partially comprised of a heat conducting material, and
wherein said filter-holder support is rotatably hinged to said coffee boiler so that heat is transmitted from said coffee boiler to said filter-holder support and to said filter-holder.
3. The dispensing group according to claim 2 , wherein said heat conducting material comprises a metal.
4. The dispensing group according to claim 2 , comprising a hinge with a rotational pin having an axis of rotation connected to the coffee boiler.
5. The dispensing group according to claim 4 , wherein said axis of rotation is substantially parallel to, or lying in, the sliding surface of said guides.
6. The dispensing group according to claim 1 , comprising also a group gasket configured to form a seal between an edge of the filter in the filter holder and a diffuser and shower screen configured to diffuse water under pressure towards said puck of coffee powder.
7. The dispensing group according to claim 1 , further comprising a piston actuated by pressurized water between a raised position and a lowered dispensing position.
8. A machine for preparing and dispensing coffee comprising at least one dispensing group according to claim 1 and at least a corresponding filter holder.
9. A dispensing group for an espresso coffee machine, wherein said group comprises:
a coffee boiler configured to contain pressurized hot water;
a supply conduit configured to feed hot water under pressure towards a puck of coffee powder; and
a filter-holder support comprising guides forming at least one sliding surface for slidably supporting a filter holder,
wherein said filter-holder support is rotatable between a first position for inserting the filter holder and a second dispensing position;
wherein said dispensing group comprises a mechanical locking device for locking said filter-holder support in said second dispensing position; and
wherein said mechanical locking device comprises a hook and a projecting pin engageable by said hook in at least one stable locking position.
10. The dispensing group according to claim 9 , wherein said hook is rotatably fixed to a fixed part of the dispensing group and said projecting pin is fixed to said filter-holder support.
11. The dispensing group according to claim 9 , wherein said hook is rigidly attached to an actuating lever.
12. The dispensing group according to claim 9 ,
wherein the coffee boiler is at least partially comprised of a heat conducting material,
wherein the filter-holder support is at least partially comprised of a heat conducting material, and
wherein said filter-holder support is rotatably hinged to said coffee boiler so that heat is transmitted from said coffee boiler to said filter-holder support and to said filter-holder.
13. The dispensing group according to claim 12 , wherein said heat conducting material comprises a metal.
14. The dispensing group according to claim 12 , comprising a hinge with a rotational pin having an axis of rotation connected to the coffee boiler.
15. The dispensing group according to claim 14 , wherein said axis of rotation is substantially parallel to, or lying in, the sliding surface of said guides.
16. The dispensing group according to claim 9 , comprising also a group gasket configured to form a seal between an edge of the filter in the filter holder and a diffuser and shower screen configured to diffuse water under pressure towards said puck of coffee powder.
17. The dispensing group according to claim 9 , further comprising a piston actuated by pressurized water between a raised position and a lowered dispensing position.
18. A machine for preparing and dispensing coffee comprising at least one dispensing group according to claim 9 and at least a corresponding filter holder.