Pour in coffee maker

Claim 2

In a coffee maker for making coffee by the batch, a hot water supply system including in combination, a hot water tank having a bottom formed with an outlet opening, a pipe in said tank extending upwardly from said opening for an appreciable distance to a predetermined level in said tank, a siphon forming member having an inlet, means manually removably mounting said siphon forming member on said pipe with said inlet adjacent to the upper end of said pipe, a heater in said tank, and means for introducing cold water into said tank adjacent to the bottom thereof.

Claim 3

A hot water supply system as in claim 1 in which said siphon forming member comprises an inverted siphon cup having a lip extending around the upper end of said pipe in spaced relation thereto.

Claim 4

A hot water supply system as in claim 1 in which said siphon-forming member comprises a portion extending downwardly into said pipe from the upper end thereof, said downwardly extending portion forming a passage with the wall of said pipe.

Claim 5

A hot water supply system as in claim 1 in which said siphon-forming member is formed with an air vent passage extending from the interior of said pipe to a location above the maximum water level of said tank.

Claim 6

A hot water supply system as in claim 1 in which said siphon-forming member comprises means forming a passage having an entry opening downwardly into said tank and an exit opening into said pipe.

Claim 7

A hot water supply system as in claim 5 in which the cross sectional area of said exit is less than the cross sectional area of said entry.

Claim 8

A hot water supply system as in claim 1 in which said siphon-forming member comprises an inverted siphon cup the lip of which extends around the upper end of said pipe and in spaced relation thereto to form a passage entry and a portion extending downwardly into said pipe from the upper end thereof, said downwardly extending portion being formed with a plurality of circumferentially spaced axially extending grooves cooperating with the wall of said pipe to form a plurality of continuations of said passage, said continuations leading into the interior of said pipe.

Claim 9

A hot water supply system as in claim 7 in which the aggregate cross sectional area of said passage continuations is less than the cross sectional area of said passage entry.

Claim 10

A hot water supply system as in claim 8 in which said siphon-forming member comprises an upper portion extending upwardly from said siphon cup to a location above the maximum water level of said tank, said member being formed with a passage extending through said lower portion and said cup and said upper portion to provide an air vent for the inside of said pipe.

Claim 11

A hot water supply system as in claim 9 in which said siphon-forming member is formed with a shoulder adapted to rest on the upper edge of said pipe to support said member in assembled position on said pipe.

Claim 12

A hot water supply system as in claim 1 including a spray head assembly readily removably assembled to the lower end of said pipe.

Claim 13

A hot water supply system as in claim 11 in which said spray head comprises a nozzle having a neck extending upwardly into said pipe and means in said neck forming a restricted opening for the flow of water out of said pipe and means providing a plurality of radially extending knife edges below said restricted opening to receive a stream of water flowing outwardly from said pipe through said restricted opening.

Claim 14

A hot water supply system as in claim 12 in which said nozzle is formed with a recess below said restricted opening and in which said knife edge forming means comprises a wheel like element and means for readily removably mounting said element in said recess.

Claim 15

A hot water supply system as in claim 13 including a plate positioned below said lower end of said pipe, said plate formed with an opening for receiving said spray head assembly, said plate opening being formed with a pair of radial extensions and in which said assembly comprises a pair of spaced lugs adapted to pass through said extensions.

Claim 16

In a hot water supply system for a coffee maker having a hot water outlet pipe, a siphon-forming member comprising a lower portion adapted to be received in said pipe, an intermediate inverted siphon cup having a lip extending around and located in spaced relationship to said lower portion and an upper portion extending upwardly from said cup, said lower portion formed with a plurality of circumferentially spaced axially extending grooves leading from the lower end of said member into said cup, said member being formed with an internal air vent passage extending from the lower end thereof to the upper end thereof.

Claim 17

In a hot water supply system for a coffee maker having a hot water outlet pipe, a siphon-forming member comprising a lower portion adapted to be received in said pipe, an intermediate inverted siphon cup having a lip extending around and located in spaced relationship to said lower portion and an upper portion extending upwardly from said cup, said lower portion formed with a plurality of circumferentially spaced axially extending grooves leading from the lower end of said member into said cup, said member being formed with an internal air vent passage extending from the lower end thereof to the upper end thereof.

Claim 18

A siphon-forming member as in claim 15 including a shoulder on the periphery of said member for engaging said pipe.

Claim 19

A hot water supply system as in claim 15 in which said spray head assembly comprises a nozzle neck extending into the lower end of said tube forming an opening appreciably smaller than the cross-sectional area of said pipe for controlling the flow of water out of said pipe and distributor located below said opening forming a plurality of radially extending knife edges for receiving water flowing out of said pipe through said smaller opening.

Claim 20

A hot water supply system as in claim 15 in which the aggregate area of said passage continuations is smaller than the area of said passage entry.

Claim 21

In a coffee maker, a hot water supply system including in combination, a hot water supply tank having a bottom formed with an outlet opening, an outlet pipe extending upwardly from a lower end at said opening to an upper end located at a predetermined level in said tank, a siphon cup comprising a lower portion adapted to be received in said pipe at the upper end thereof and to extend downwardly into said pipe, an intermediate inverted siphon cup having a lip extending around and in spaced relation to said pipe adjacent to the upper end thereof to form a siphon passage entry, said lower portion being formed with a plurality of circumferentially spaced axially extending peripheral grooves forming with the wall of said pipe a plurality of siphon passage continuations leading from said cup to the interior of said pipe below said member, and an upper portion extending upwardly from said cup to a location in said tank above the maximum water level thereof, said member being formed with a passage extending from the lower end of said member to the upper end thereof to provide an air vent for said pipe, a spray head assembly, and means for readily releasably securing said spray head assembly over the lower end of said pipe.

Claim 22

In a coffee maker, a hot water supply system including in combination, a hot water supply tank having a bottom formed with an outlet opening, an outlet pipe extending upwardly from a lower end at said opening to an upper end located at a predetermined level in said tank, a siphon cup comprising a lower portion adapted to be received in said pipe at the upper end thereof and to extend downwardly into said pipe, an intermediate inverted siphon cup having a lip extending around and in spaced relation to said pipe adjacent to the upper end thereof to form a siphon passage entry, said lower portion being formed with a plurality of circumferentially spaced axially extending peripheral grooves forming with the wall of said pipe a plurality of siphon passage continuations leading from said cup to the interior of said pipe below said member, and an upper portion extending upwardly from said cup to a location in said tank above the maximum water level thereof, said member being formed with a passage extending from the lower end of said member to the upper end thereof to provide an air vent for said pipe, a spray head assembly, and means for readily releasably securing said spray head assembly over the lower end of said pipe.