US4910973A — Portable ice cream machine

Claim 1

Independent Claim 167 words

A machine for making ice cream and the like, comprising; a receptacle for receiving liquid ingredients to be used for making the ice cream; a mixing chamber having an egress from which the ice cream exits; a cooling chamber surrounding said mixing chamber; a rotor centrally mounted in said mixing chamber for atomizing and mixing the liquid ingredients and moving it through the mixing chamber to its egress, said rotor having a central post and outwardly projecting blade means; conduit means for feeding the liquid ingredients from the receptacle to the central post of the rotor; outlet port means on said central post through which the liquid ingredients are ejected outwardly from the central post for action by the blade means, and wherein said central post has a bore extending at least partially therein, at least one aperture extending from said bore to the exterior of said shaft, and wherein said conduit means comprises a drive shaft received with in said bore for rotating said central post.

Claim 2

Dependent Claim 167 words

A machine for making ice cream and the like, comprising; a receptacle for receiving liquid ingredients to be used for making the ice cream; a mixing chamber having an egress from which the ice cream exits; a cooling chamber surrounding said mixing chamber; a rotor centrally mounted in said mixing chamber for atomizing and mixing the liquid ingredients and moving it through the mixing chamber to its egress, said rotor having a central post and outwardly projecting blade means; conduit means for feeding the liquid ingredients from the receptacle to the central post of the rotor; outlet port means on said central post through which the liquid ingredients are ejected outwardly from the central post for action by the blade means, and wherein said central post has a bore extending at least partially therein, at least one aperture extending from said bore to the exterior of said shaft, and wherein said conduit means comprises a drive shaft received with in said bore for rotating said central post.

Claim 3

Dependent Claim 31 words

A machine for making ice cream and the like as in claim 1, wherein said drive shaft and said bore are matingly keyed whereby said drive shaft rotatingly drives said rotor.

Claim 4

Dependent Claim 33 words

A machine for making ice cream and the like as in claim 1, wherein said drive shaft has an axial passageway therethru for feeding the liquid ingredients from said receptacle to said bore.

Claim 5

Dependent Claim 48 words

A machine for making ice cream and the like as in claim 2, comprising removable cooling unit including said cooling chamber and said mixing chamber, a housing for retaining said receptacle and said removable cooling unit and wherein said drive shaft locks the cooling unit to the housing.

Claim 6

Dependent Claim 53 words

A machine for making ice cream and the like as in claim 2, and further comprising a pulley wheel coaxially mounted with the drive shaft, a diving means for rotating said pulley wheel, and wherein said pulley wheel and said drive shaft are matingly keyed whereby said pulley rotatably operates said drive shaft.

Claim 7

Dependent Claim 46 words

A machine for making ice cream and the like as in claim 5, and further comprising motor means mounted adjacent said pulley wheel and having an output shaft, a drive wheel on said output shaft, and belt means coupling said drive wheel and said pulley wheel.

Claim 8

Dependent Claim 32 words

A machine for making ice cream and the like as in claim 2, wherein said drive shaft has a substantially square cross sectional configuration and said bore has a matingly shaped configuration.

Claim 9

Dependent Claim 39 words

A machine for making ice cream and the like as in claim 5, wherein said drive shaft has a substantially square cross sectional configuration, and said pulley wheel has a matingly shaped axial opening to receive said drive shaft.

Claim 10

Dependent Claim 30 words

A machine for making ice cream and the like as in claim 8, wherein said axial opening is octagonal in shape to facilitate insertion of said drive shaft there through.

Claim 11

Dependent Claim 24 words

A machine for making ice cream and the like as in claim 1, wherein said drive shaft is removable from said bore for cleaning.

Claim 12

Dependent Claim 48 words

A machine for making ice cream and the like as in claim 1, comprising a threaded pin rotatingly supported by said drive shaft for rotation in a reverse threaded direction, and projecting into said receptacle for pulling down the liquid ingredients from the receptacle into the mixing chamber.

Claim 13

Dependent Claim 138 words

A machine for making ice cream and the like comprising: a housing; a receptacle for receiving liquid ingredients to be used for making the ice cream; a mixing chamber having an inlet for receiving the liquid ingredients and an outlet for ejecting the ice cream; a rotor in said mixing chamber operatively rotatable for mixing the ingredients and moving it through the mixing chamber from its inlet to its outlet; an elongated passageway extending from the receptacle to the mixing chamber; draw thru means for mechanically pulling down the liquid ingredients through said passageway to the mixing chamber, to aid in the continuous flow of the liquid into the mixing chamber, and wherein said draw through means comprises a threaded post coaxially located in said passageway, and means for rotatingly driving said post in a reverse threading direction.

Claim 14

Dependent Claim 138 words

A machine for making ice cream and the like comprising: a housing; a receptacle for receiving liquid ingredients to be used for making the ice cream; a mixing chamber having an inlet for receiving the liquid ingredients and an outlet for ejecting the ice cream; a rotor in said mixing chamber operatively rotatable for mixing the ingredients and moving it through the mixing chamber from its inlet to its outlet; an elongated passageway extending from the receptacle to the mixing chamber; draw thru means for mechanically pulling down the liquid ingredients through said passageway to the mixing chamber, to aid in the continuous flow of the liquid into the mixing chamber, and wherein said draw through means comprises a threaded post coaxially located in said passageway, and means for rotatingly driving said post in a reverse threading direction.

Claim 15

Dependent Claim 49 words

A machine for making ice cream and the like as in claim 12, wherein said threaded post projects into said receptacle, and further comprising a feed plug insertable from said receptacle at least part way into said passageway, and having a central bore coaxially surrounding the projecting threaded post.

Claim 16

Dependent Claim 31 words

A machine for making ice cream and the like as in claim 13, wherein said feed plug has opposing slots therein for aiding entry of the liquid ingredients into the passageway.

Claim 17

Dependent Claim 38 words

A machine for making ice cream and the like as in claim 13, and further comprising a stop plug removably insertable into said feed plug for blocking the flow of liquid from said receptacle through said feed plug.

Claim 18

Dependent Claim 45 words

A machine for making ice cream and the like as in claim 13, and comprising a plurality of interchangeable feed plugs, each interchangeably insertable from the receptacle, and each having a different sized central bore, whereby different consistencies of liquid ingredients can thereby be accommodated.

Claim 19

Dependent Claim 37 words

A machine for making ice cream and the like as in claim 14, and wherein said receptacle comprises a funnel shaped base wall feeding down towards same passageway to help guide the liquid ingredients through said passageway.

Claim 20

Dependent Claim 80 words

A machine for making ice cream and the like as in claim 12, and further comprising an elongated drive shaft extending between said receptacle and said mixing chamber, said passageway being axially formed through said drive shaft, an upper end in said drive shaft supporting said threaded post, a lower end o said drive shaft coupled to said rotor, and further comprising drive means for rotatingly operating said drive shaft to hereby rotate both said rotor and said threaded post.

Claim 21

Dependent Claim 137 words

An ice cream making machine comprising a base, a stanchion upstanding from the base, and a head portion supported on the stanchion, a central axial passageway through said head portion, a receptacle for receiving liquid ingredients and removably securable onto said head portion, said receptacle having an outlet aligned with said central axial passageway, a removable portable cooling cannister dependingly secured to an underside of said head portion, a mixing chamber in said cooling cartridge coaxially aligned with said passageway, a rotor removably inserted into said mixing chamber, and drive means in said stanchion for rotatingly driving said rotor means, and further comprising a drive shaft removably received in said passageway for rotatingly driving said rotor and having a central coaxial channel therethru, said liquid ingredients flowing through said channel from said receptacle to the mixing chamber.

Claim 22

Dependent Claim 137 words

An ice cream making machine comprising a base, a stanchion upstanding from the base, and a head portion supported on the stanchion, a central axial passageway through said head portion, a receptacle for receiving liquid ingredients and removably securable onto said head portion, said receptacle having an outlet aligned with said central axial passageway, a removable portable cooling cannister dependingly secured to an underside of said head portion, a mixing chamber in said cooling cartridge coaxially aligned with said passageway, a rotor removably inserted into said mixing chamber, and drive means in said stanchion for rotatingly driving said rotor means, and further comprising a drive shaft removably received in said passageway for rotatingly driving said rotor and having a central coaxial channel therethru, said liquid ingredients flowing through said channel from said receptacle to the mixing chamber.

Claim 23

Dependent Claim 65 words

An ice cream making machine as in claim 21, wherein said cartridge comprises an upwardly extending locking arm, a recess in said head portion for receiving at least a portion of the locking arm, add a locking finger extending from said locking arm in the direction of rotation of the rotor, whereby rotation of the rotor aids in maintaining the cartridge in a locked position.

Claim 24

Dependent Claim 27 words

An ice cream making machine as in claim 19, wherein said rotor comprises a central post, and a radially outwardly projecting blade spirally configured about said post.

Claim 25

Dependent Claim 18 words

An ice cream making machine as in claim 21, wherein said blade is segmented along its spiral path.

Claim 26

Dependent Claim 21 words

An ice cream making machine as in claim 21, and comprising a tapered screw at the distal end of said post.

Claim 27

Dependent Claim 39 words

An ice cream making machine as in claim 19, wherein said rotor comprises a central post, a sequence of fins projecting from said post in orthogonal arranged sequence, successive fins being arranged in sequential layers one beneath the other.

Claim 28

Dependent Claim 29 words

An ice cream making machine as in claim 24, wherein said central post is substantially square, and wherein said fins respectively extend from a side of said central post.

Claim 29

Dependent Claim 66 words

An ice cream making machine as in claim 21, and wherein said rotor comprises a central post, a bore coaxially extending therein from an upper edge thereof, an aperture from said bore to the exterior of said post, said drive shaft being received in said bore for driving said rotor, for central feeding the liquid ingredients thereto, and for locking said cannister to the head portion.

Claim 30

Dependent Claim 43 words

An ice cream making machine as in claim 21, and comprising a central pulley positioned in said head portion, a central aperture formed therein, said drive shaft passing through said central aperture, and belt means from said drive means to said central pulley.

Claim 31

Dependent Claim 147 words

An ice cream machine, comprising a housing, a storage compartment on said housing for retaining liquid ingredients to be used for making ice cream; a portable removable cartridge having an annular cooling compartment defined by interior and exterior walls, the interior wall forming the outer wall of a mixing chamber, said mixing chamber receiving the liquid ingredients directly therein from the storage compartment; motor driven rotor means including a plurality of blades rotatably driven within said mixing chamber and effective to atomize the liquid ingredients and move it downward through the mixing chamber; cooling means in said cooling compartment for cooling the mixing chamber; outlet means for extracting the ice cream from the mixing chamber, and coupling means for releasably coupling said cartridge from said housing, said coupling means comprising means for aiding the securement of the cartridge to the housing through rotation of the rotor means.

Claim 32

Dependent Claim 147 words

An ice cream machine, comprising a housing, a storage compartment on said housing for retaining liquid ingredients to be used for making ice cream; a portable removable cartridge having an annular cooling compartment defined by interior and exterior walls, the interior wall forming the outer wall of a mixing chamber, said mixing chamber receiving the liquid ingredients directly therein from the storage compartment; motor driven rotor means including a plurality of blades rotatably driven within said mixing chamber and effective to atomize the liquid ingredients and move it downward through the mixing chamber; cooling means in said cooling compartment for cooling the mixing chamber; outlet means for extracting the ice cream from the mixing chamber, and coupling means for releasably coupling said cartridge from said housing, said coupling means comprising means for aiding the securement of the cartridge to the housing through rotation of the rotor means.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1993-03-26	1993-09-25	1994-03-27	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1997-03-26	1997-09-25	1998-03-27	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2001-03-26	2001-09-25	2002-03-27	$7700.00	Window Closed / Lapsed

Portable ice cream machine

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