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US 5,797,678 AGranted
Bone cement mixing device and method
OwnerWilliam M. Murrayinventor
Life of this patent
Estimating the term…
Abstract
A device for mixing bone cement of the present invention includes a housing having an open top. An internal chamber is located in the housing. The internal chamber is inclined at an angle from a vertical axis. The device further includes a mixer having stirrer elements extending into the internal chamber and a cap configured to fit over the open top of the housing to sealably close the housing. The method of mixing bone cement according to the present invention includes the steps of placing bone cement powder into an inclined chamber, introducing bone cement liquid into the inclined chamber and then mixing the bone cement liquid and bone powder to form mixed bone cement.
Claims47
A device for mixing a liquid monomer with a polymer powder to form a bone cement, the device comprising:
- a housing having an open top;
- a non-rotatable internal chamber located in said housing, wherein said internal chamber is inclined at an angle from a vertical axis;
- a syringe cartridge configured to be removably and non-rotatably received in said internal chamber;
- a cap configured to fit over said open top of said housing to sealably close said housing;
- and
- a mixer assembly having at least one stirrer element configured to extend into said syringe cartridge in said internal chamber.
3 more elements
A device for mixing bone cement, comprising:
- a housing having an open top;
- an internal chamber located in said housing, wherein said internal chamber is inclined at an angle from a vertical axis;
- a cap configured to fit over said open top of said housing to sealably close said housing;
- a mixer assembly having at least one stirrer element configured to extend into said internal chamber;
- and
- a funnel assembly having a sidewall, a top and a bottom portion,
- wherein said funnel assembly is in flow communication with said internal chamber of said housing, and
- wherein said funnel assembly further includes a fluid channel located in said sidewall of said funnel assembly and configured to direct at least a portion of the monomer liquid through said funnel assembly.
5 more elements
A device for mixing bone cement, comprising:
- a housing having an open top;
- an internal chamber located in said housing, wherein said internal chamber is inclined at an angle from a vertical axis;
- a cap configured to fit over said open top of said housing to sealably close said housing;
- a mixer assembly having at least one stirrer element configured to extend into said internal chamber;
- and
- a funnel assembly having a sidewall, a top and a bottom portion,
- wherein said funnel assembly is in flow communication with said internal chamber of said housing,
- wherein said funnel includes an upper main chamber and a throat, and
- wherein said funnel assembly includes a sidewall projection, a fluid opening in said top of said funnel assembly and a fluid channel extending from said fluid opening, through said sidewall projection, to said throat.
6 more elements
A device for mixing a liquid monomer with a polymer powder to form a bone cement, the device comprising:
- a hollow housing having an open top;
- a non-rotatable internal chamber located in said housing, wherein said internal chamber is inclined at an angle between 10.degree. and 45.degree. from a vertical axis;
- a non-rotatable syringe cartridge having a sidewall, a bottom closed by a slidable piston and a set of engagement members, wherein said syringe cartridge is configured to be removably and non-rotatably received in said internal chamber;
- a vacuum passage extending into said internal chamber of said housing;
- a vacuum attachment fitting in flow communication with said vacuum passage;
- a funnel assembly having a sidewall, a top and a bottom portion, wherein said bottom portion includes engagement elements configured to engage said engagement members of said syringe cartridge, and wherein said funnel assembly is in flow communication with an interior of said syringe cartridge;
- a cap configured to fit over said open top of said housing to sealably close said housing;
- and
- a rotary mixer having at least one stirrer element configured to extend into said interior of said syringe cartridge.
6 more elements
A device for mixing bone cement, comprising:
- a hollow housing having an open top;
- an internal chamber located in said housing, wherein said internal chamber is inclined at an angle between 10.degree. and 45.degree. from a vertical axis:
- a syringe cartridge having a sidewall, a bottom closed by a slidable piston and a set of engagement members, wherein said syringe cartridge is configured to extend into said internal chamber;
- a vacuum passage extending into said internal chamber of said housing;
- a vacuum attachment fitting in flow communication with said vacuum passage;
- a funnel assembly having a sidewall, a top and a bottom portion, wherein said bottom portion includes engagement elements configured to engage said engagement members of said syringe cartridge, and wherein said funnel assembly is in flow communication with an interior of said syringe cartridge;
- a cap configured to fit over said open top of said housing to sealably close said housing;
- and
- a rotary mixer having at least one stirrer element configured to extend into said interior of said syringe cartridge,
- wherein said funnel assembly includes a fluid opening in said top of said funnel assembly and a fluid channel extending from said fluid opening through said funnel assembly sidewall.
7 more elements
A device for mixing bone cement, comprising:
- a housing having a front wall, a rear wall, a pair of substantially planar sidewalls and an open top;
- an internal chamber located in said housing, wherein said internal chamber is inclined at an angle of between 10.degree. to 45.degree. from a vertical axis;
- a syringe cartridge having a sidewall, a bottom closed by a slidable piston and a set of engagement members, wherein said syringe cartridge is configured to fit into said internal chamber;
- a vacuum passage extending through said housing into said internal chamber;
- a vacuum attachment fitting in flow communication with said vacuum passage;
- a rotary mixer having at least one stirrer element configured to extend into an interior of said syringe cartridge;
- a funnel assembly having a top and a bottom portion, wherein said funnel assembly is located above and in flow communication with said interior of said syringe cartridge, wherein said funnel assembly includes an upper main chamber, a throat and a sidewall projection, and wherein said bottom portion of said funnel assembly includes engagement elements configured to engage said engagement members of said syringe cartridge;
- a fluid opening in said top of said funnel assembly;
- a fluid channel, wherein said fluid channel extends from said fluid opening in said top of said funnel assembly through said sidewall projection to said throat;
- a drip ring located above said funnel assembly, wherein said drip ring includes an annular passage having a bottom, at least one orifice in flow communication with said annular passage, and at least one hole located in said bottom of said annular passage and in flow communication with said main chamber;
- a cover member configured to cover at least a portion of said fluid channel in said main chamber;
- and
- a cap configured to fit over said open top of said housing to sealably close said housing.
10 more elements
A method of mixing a bone cement liquid and a bone cement powder to form a mixed bone cement, comprising the steps of:
- placing the bone cement powder into an inclined syringe cartridge;
- introducing the bone cement liquid into said inclined syringe cartridge;
- and
- mixing said bone cement liquid and bone cement powder to form mixed bone cement.
1 more element
A method of mixing bone cement, comprising the steps of:
- placing bone cement powder into an inclined chamber;
- introducing bone cement liquid into said chamber;
- and
- mixing said bone cement liquid and bone cement powder to form mixed bone cement,
- wherein said step of placing bone cement powder into said inclined chamber includes the step of pouring bone cement Powder through a funnel assembly into a syringe container, wherein said funnel assembly is located above said syringe container
- wherein said step of introducing the bone cement liquid into said inclined syringe cartridge includes the step of pouring at least a portion of said bone cement liquid into a fluid channel located in a sidewall of said funnel assembly.
3 more elements
A bone cement mixing sub-assembly for co-acting with a bone cement mixing housing having an inclined, non-rotatable internal chamber, the bone cement mixing sub-assembly adapted to mix a liquid monomer with a polymer powder to form a bone cement, the sub-assembly comprising:
- a syringe cartridge configured to be removably and non-rotatably received in the internal chamber;
- a cap configured to fit over an open top of the housing to sealably close the housing;
- and
- a mixer assembly having at least one stirrer element configured to extend into the syringe cartridge in the internal chamber.
1 more element
Dependencies are inferred from the claim text.