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US 2003/0156771 A1Published application
Removable mortar mixer bearing and seal assembly
AssigneeStone Construction Equipment, Inc.
InventorsEdward A. Varel, William J. Beswick
Life of this patent
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AssigneeStone Construction Equipment, Inc.
InventorsEdward A. Varel, William J. Beswick
Estimating the term…
A bearing and seal assembly for supporting and sealing end portions of a rotatable paddle shaft in the end walls of a mortar mixer or the like. Each bearing and seal assembly includes a bearing and seal housing removably attached to an end wall of the mixer drum by bolts to facilitate replacement of the bearings and seals as becomes necessary during use. The outside wall of the housing includes a peripheral ring or shoulder for engagement with a conventional bearing puller to facilitate removal of the housing, bearings and seals as a single unit. Preassembled housing, bearing and seal units can then be used as replacements. The bearings and seals are also spaced longitudinally to provide a space for abrasive materials that may migrate past the seals to extend the life expectancy of the bearings by decreasing exposure to contamination. The housing also includes an opening in the lower portion thereof communicating with the space between the bearings and seals to enable material which migrates past the seals to fall through the opening onto the ground thereby further protecting the bearings from contamination and indicating to the mixer operator that the seals are becoming worn or have failed so that prompt maintenance or replacement may be undertaken.
A seal and bearing assembly for receiving and supporting one end portion of a driven rotary shaft, which comprises a housing adapted for removable attachment to an end wall of a receptacle through which the driven shaft passes, bearing and seal subassemblies laterally spaced in said housing and surrounding said shaft and supporting the shaft from the housing adjacent an end extremity of the shaft, a trunnion member surrounding and journaling said housing from a support, said housing having an opening in a bottom portion thereof in general alignment with a space between the bearing and seal subassemblies to enable material which passes through the seal assembly from the receptacle to fall through said opening.
A replacement seal and bearing assembly for receiving and supporting one end of a paddle shaft extending through an aperture in an end wall of a drum of a mortar mixer which comprises a housing removably attached to said drum end wall, bearing and seal subassemblies laterally spaced in said housing and surrounding said shaft and supporting said shaft from the housing adjacent an end extremity of the shaft, a trunnion member surrounding and journaling said housing from a support, and said housing and said bearing and seal subassemblies combined into a unitary assembly for removal and replacement.
In a mortar mixer, a pivotally supported generally horizontally disposed mixer drum, a rotatably driven paddle shaft extending through drum end walls, an outwardly projecting housing on each end wall rotatably supporting remote ends of said paddle shaft, laterally spaced bearings and seals interposed between the housing and shaft for rotatably supporting the shaft and forming a seal between the shaft and the housing, said housing including an opening in a bottom portion thereof communicating with a space between the bearings and seals to discharge material migrating between the shaft and seals to protect the bearings from contamination by the material and indicating wear conditions of the seals.
Dependencies are inferred from the claim text.