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Machine to produce espresso coffee

  • US 6,510,783 B1
  • Filed: 08/22/2001
  • Issued: 01/28/2003
  • Est. Priority Date: 02/22/1999
  • Status: Expired due to Fees
First Claim
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1. Machine (10) to produce espresso coffee comprising a containing structure defining at least an infusion chamber (20) co-operating with means (14) to deliver water under pressure and means (15) to instantaneously heat the water, said infusion chamber (20) being able to contain a pre-packed portion (11) of coffee powder and comprising two parts, respectively upper (20a) and lower (20b), said two parts (20a, 20b) being able to be selectively coupled so as to define at least a first open condition of the infusion chamber, for the insertion/removal of the pre-packed portion (11), and a second closed condition of said infusion chamber (20) during the coffee-preparation cycle, said lower part (20b) defining a positioning seating for at least one pre-packed portion (11) and being made on a trolley (23) movable on a substantially horizontal plane from a first inner position, wherein the lower part (20b) is arranged in axis with and below the upper part (20a), to a second outer position wherein said lower part (20b) is removed outside 20 the structure of the machine (10) to allow said pre-packed portion (11) to be positioned, characterised in that the upper part (20a) of said infusion chamber (20) is made on a block (22) movable on a substantially vertical axis from a first raised position to a second lowered position wherein it is hermetically coupled with the lower part (20b), in that comprises expulsion means (36) able to automatically remove the portion (11), after the coffee has been delivered, during the withdrawal movement of said lower part (20b) from the structure (35) and inherently and consistently with this withdrawal movement, and in that at least said lower part (20b) co-operates with elastic means (61, 53) able to hold the pre-packed portion (11) at least partly detached from the bottom at least during said withdrawal movement to facilitate the discharge of said portion (11) after the coffee has been prepared.

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