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1. (US5863118) Blender with extendible housing
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What is claimed is:
1. A blender comprising:
a housing enclosing a motor and having a lower portion and an intermediate portion, said lower portion being movable in relation to said intermediate portion to permit said lower portion to be extended with respect to said intermediate portion;
a blending blade structure;
a shaft extending axially in said housing, said shaft having a first part and a second part, wherein said first part is coupable to said motor for rotation thereby, and said second part is slidably coupled to said blending blade structure; and
coupling means for coupling said blending blade structure to said lower portion of said housing, thereby to enable said blending blade structure to move axially in tandem with said lower portion of said housing, said coupling means including an annular channel about an interior surface of said lower portion of said housing, said blending blade structure further comprising a rotatable sleeve having a blending blade mounted thereon, said rotatable sleeve having at least one projection about a circumference thereof adapted to rotate within said annular channel, so as to enable said rotatable sleeve to move axially with said lower portion of said housing.
2. The blender of claim 1, wherein said at least one projection is an annular tooth.
3. The blender of claim 1, wherein said first part of said shaft is slidably coupled to said blending blade structure by at least one protrusion on said first part of said shaft, said at least one protrusion being formed to slidably engage said rotatable sleeve, so as to enable relative sliding movement therebetween. movement of said lower portion of said housing and said blending blade structure at a fully extended position, and to prevent complete separation of said intermediate portion of said housing from said lower portion of said housing.
4. The blender of claim 3, wherein said rotatable sleeve has an inner surface with at least one axial channel in which said at least one protrusion slides.
5. The blender of claim 1, wherein said lower portion of said housing includes a compression locking ring for holding said lower portion of said housing in a fixed position relative to said intermediate portion of said housing.
6. The blender of claim 5, wherein said compression locking ring includes a threaded outer ring and a threaded inner surface.
7. The blender of claim 5, further comprising a resilient cap disposed on an engaging surface of said lower portion of said housing, said engaging surface of said lower portion of said housing located adjacent said intermediate portion of said housing.
8. The blender of claim 1, wherein said coupling means includes stop means to stop axial Movement of said lower portion of said housing and said blending blade structure at a fully extended position, and to prevent complete seperation of said intermediate portion of said housing from said lower portion of said housing.
9. The blender of claim 1, wherein said lower portion of said housing includes a skirt portion, said skirt portion enclosing and moving with said blending blade structure, so that said blending-blade remains within said skirt during use.
10. The blender of claim 1, wherein said housing further comprises an upper portion, wherein said motor is mounted within said upper portion, and said upper portion is detachable from said lower and intermediate portions.
11. A blender attachment, comprising:
a motor housing interface, said motor housing interface including means for attachment to a motor housing;
a rotatable shaft having a first part and a second part, said first part of said rotatable shaft being rotatably mounted within said motor housing interface;
a blending blade structure slidably coupled to said second part of said rotatable shaft and including a blending blade; and
a skirt seated about said second part of said rotatable shaft, encompassing said blending blade, and including apertures therein to allow circulation of a material being blended around said blending blade,
wherein said skirt is movable with said blending blade and with respect to said motor housing interface.
12. The blender attachment of claim 11, wherein said blending blade is mounted to a rifled shaft clutch, and said second part of said rotatable shaft includes at least one protrusion adapted to engage said rifled shaft clutch, thus enabling said shaft to rotate said a blending blade.