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Infuser unit for coffee machine

A pourer, coffee machine technology, applied in applications, kitchen utensils, home utensils, etc., can solve the problems of unavailability of grease, complicated online management and material supply, reduce regular maintenance, simplify online management and material supply, long life effect

Pending Publication Date: 2019-04-02
DELONGHI APPLIANCES S R L CON UNICO SOCIO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, such greases are often not approved for use with potable water
[0008] These solutions require the manual introduction of grease in the product line (an operation that requires a great deal of operator-related variability) and complicate online management and material supply

Method used

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  • Infuser unit for coffee machine
  • Infuser unit for coffee machine
  • Infuser unit for coffee machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Reference is made to the preceding figures, which show, by way of example only, a known type of perfuser unit 1 , for which reason it will not be described in detail.

[0028] Accordingly, the scope of the present invention goes beyond the specific configuration of the coffee machine shown below.

[0029] The infusion unit 1 comprises a hollow infusion cylinder 2 having an inlet opening 8 engageable by a closing piston 3 in order to delimit an infusion chamber 4 , a dose of coffee 30 capable of being supplied by a loader 6 Positionable in the infusion chamber; an injection piston 5 for ejecting a spent dose of coffee 30 from the infusion chamber 4 ; and actuating means for the injection piston 5 .

[0030] The filling cylinder 2 can be used in a position for loading a dose of coffee 30 (in which position the filling cylinder is disengaged from the closing piston 3 and its axis is inclined relative to the axis of the closing piston 3) and in a filling position (in which ...

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PUM

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Abstract

The invention discloses an infuser unit (1) for a coffee machine, comprising a closing piston (3) and an infusion cylinder (2) which are axially movable selectively or in combination for reciprocal engagement and disengagement so as to close and open an infusion chamber inside the infusion cylinder (2), in which a dose of coffee can be positioned, an ejection piston (5) engaged in the infusion cylinder (2) and axially movable in the infusion cylinder (2) so as to expel the spent coffee grounds, a first radial hydraulic sealing means between the closing piston (3) and the infusion cylinder (2),and a second radial hydraulic sealing means between the infusion cylinder (2) and the ejection piston (5), at least one between the first hydraulic sealing means and the second hydraulic sealing means comprising at least one seal (100, 101) having an anti-friction surface coating made of a material free of grease and lubricating oils and compatible with use in contact with foodstuffs and drinkingwater.

Description

technical field [0001] The invention relates to an infuser unit for a coffee machine. Background technique [0002] The syringe unit cited is of the type having a priming cylinder which can undergo reversible movement from a position disengaged from the closing piston to a position engaged with the closing piston in order to form a priming chamber by means of a Suitable channels convey boiler heated priming water into the priming chamber. [0003] The inside of the filling cylinder has a spray piston which moves in a coordinated manner with the scraper element in order to expel the coffee grounds. [0004] One of the important aspects of these types of coffee machines is the friction generated in the injector unit due to the axial movement between the filling cylinder and the closing piston and between the ejection piston and the filling cylinder. [0005] To limit friction between moving parts, annular or lip hydraulic O-ring seals are available which must withstand press...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A47J31/36A47J31/44
CPCA47J31/3604A47J31/3638A47J31/4403A47J31/36A47J31/24
Inventor 朱塞佩·德隆吉弗洛里亚诺·弗兰宗
Owner DELONGHI APPLIANCES S R L CON UNICO SOCIO