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US 5,403,086 AGranted
Mixing device
AssigneeScepter Manufacturing Company Limited
InventorPhilip E. Lindesay
Life of this patent
Estimating the term…
Abstract
A mixing device such as a concrete mixer is provided in the form of a hollow cylindrical drum with an opening at one end. A lid is engageable with the drum to close the opening. At least one and preferably two baffles are provided within the drum and these are shaped so as to cause an end to end as well as tumbling movement of the contents of the drum when the drum is rolled along a ground surface.
Claims19
A mixing device comprising:
- a hollow cylindrical drum having a central longitudinal axis, a first closed end, a second open end, and a cylindrical sidewall constituting a means for rotatably supporting said drum in rolling contact with a horizontal surface, with said central longitudinal axis oriented horizontally, for rotation about said central longitudinal axis;
- at least one baffle protruding inwardly from said cylindrical sidewall and extending in a substantially helical shape, said at least one baffle comprising means for causing material within said drum to be tumbled and moved toward said first end of said drum when said central longitudinal axis is positioned horizontally and said drum is rotated about said central longitudinal axis in a first direction, and for causing the material within said drum to be tumbled and moved toward said second end of said drum when said central longitudinal axis is positioned horizontally and said drum is rotated about said central longitudinal axis in a second direction opposite said first direction;
- and
- a lid engageable with said drum to close said open second end thereof, said lid having a diameter substantially equal to a diameter of said cylindrical sidewall.
1 more element
A mixing device comprising:
- a hollow cylindrical drum having a central longitudinal axis, a first closed end, a second open end, and a cylindrical sidewall constituting a means for rotatably supporting said drum in rolling contact with a horizontal surface, with said central longitudinal axis oriented horizontally, for rotation about said central longitudinal axis;
- at least one baffle protruding inwardly from said cylindrical sidewall and extending in a substantially helical shape, said at least one baffle comprising means for causing material within said drum to be tumbled and moved toward said first end of said drum when said central longitudinal axis is positioned horizontally and said drum is rotated about said central longitudinal axis in a first direction, and for causing the material within said drum to be tumbled and moved toward said second end of said drum when said central longitudinal axis is positioned horizontally and said drum is rotated about said central longitudinal axis in a second direction opposite said first direction;
- a lid engageable with said drum to close said open second end thereof, said lid having a diameter substantially equal to a diameter of said cylindrical sidewall;
- and
- wherein said at least one baffle is formed such that a first end of said at least one baffle adjacent said first end of said drum extends along a first line, and a second end of said at least one baffle adjacent said second end of said drum extends along a second line which is angled relative to said first line.
2 more elements
A mixing device comprising:
- a hollow cylindrical drum having a central longitudinal axis, a first closed end, a second open end, and a cylindrical sidewall constituting a means for rotatably supporting said drum in rolling contact with a horizontal surface, with said central longitudinal axis oriented horizontally, for rotation about said central longitudinal axis;
- at least one baffle protruding inwardly from said cylindrical sidewall and extending in a substantially helical shape, said at least one baffle comprising means for causing material within said drum to be tumbled and moved toward said first end of said drum when said central longitudinal axis is positioned horizontally and said drum is rotated about said central longitudinal axis in a first direction, and for causing the material within said drum to be tumbled and moved toward said second end of said drum when said central longitudinal axis is positioned horizontally and said drum is rotated about said central longitudinal axis in a second direction opposite said first direction;
- a lid engageable with said drum to close said open second end thereof;
- wherein said at least one baffle includes first and second sidewalls extending inwardly from said cylindrical sidewall of said drum, said first and second sidewalls meeting to form an apex at a radially innermost portion of said at least one baffle;
- and
- wherein lines extending along radially outermost portions of said first and second sidewalls are substantially non-parallel to a line extending along said apex of said at least one baffle.
3 more elements
Dependencies are inferred from the claim text.