Ergonomically friendly orbital sander construction
AssigneeHao Chien Chao
InventorPaul W. Huber
Life of this patent
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Abstract
A random orbital sander including a housing, a motor having a vertical axis in the housing, a pad coupled to the motor, a face on the pad extending substantially perpendicularly to the vertical axis, a shroud surrounding the pad, an opening in the shroud, and a dust discharge tube having an inner end in communication with the opening and an outer end on the dust discharge tube end extending at an acute angle to the face of the pad. An orbital sander wherein the pad is supported from the sander housing by columnar units located on opposite sides of the motor. A bore in the motor shaft conducts compressed air through the chamber housing the bearings which support the spindle which mounts the pad.
Claims22
An orbital sander comprising a housing, a compressed air motor in said housing, a pad support secured to said motor, first and second elongated rows of spaced plastic columns located on opposite sides of said motor and located between said housing and said pad support, a shaft in said motor, a rotor mounted on said shaft, a compressed air duct in said motor for conducting compressed air to said rotor, an eccentric housing mounted on said shaft, a chamber in said eccentric housing, at least one bearing in said chamber, said pad support being secured to said eccentric housing, said first and second rows of spaced plastic columns having lower ends proximate said pad support and have higher ends proximate said housing, first bar members located at said lower ends of each of said first and second rows of plastic columns, second bar members located at said upper ends of each of said first and second rows of plastic columns, and means in said motor for conducting compressed air to said chamber.
An orbital sander comprising a housing, a compressed air motor in said housing, a pad support secured to said motor, first and second elongated rows of spaced plastic columns located on opposite sides of said motor and located between said housing and said pad support, a shaft in said motor, a rotor mounted on said shaft, a compressed air duct in said motor for conducting compressed air to said rotor, an eccentric housing mounted on said shaft, a chamber in said eccentric housing, at least one bearing in said chamber, said pad support being secured to said eccentric housing, said first and second rows of spaced plastic columns having lower ends proximate said pad support and have higher ends proximate said housing, first bar members located at said lower ends of each of said first and second rows of plastic columns, second bar members located at said upper ends of each of said first and second rows of plastic columns, and another duct in said shaft in communication with said compressed air duct and said chamber for conducting compressed air to said chamber.
An orbital sander comprising a housing, a compressed air motor in said housing, a pad support secured to said motor, first and second elongated rows of spaced plastic columns located on opposite sides of said motor and located between said housing and said pad support, a shaft in said motor, a rotor mounted on said shaft, a compressed air duct in said motor for conducting compressed air to said rotor, an eccentric housing mounted on said shaft, a chamber in said eccentric housing, at least one bearing in said chamber, said pad support being secured to said eccentric housing, said first and second rows of spaced plastic columns having lower ends proximate said pad support and have higher ends proximate said housing, first bar members located at said lower ends of each of said first and second rows of plastic columns, second bar members located at said upper ends of each of said first and second rows of plastic columns, another duct in said shaft in communication with said compressed air duct and said chamber for conducting compressed air to said chamber, said another duct being a bore in said shaft, a keyway in said rotor, a key slot in said shaft, a key in said key slot and extending into said keyway, a clearance between said key and said key slot, a crossbore in said shaft in communication with said key slot, said crossbore being in communication with said bore in said shaft, a pad connected to said eccentric housing, a face on said pad support on the opposite side thereof from said eccentric housing, said orbital sander having a vertical centerline, and said orbital sander having a height dimension from the top of its housing to said face of said pad which is not greater than about 98 millimeters.
An orbital sander comprising a housing, a compressed air motor in said housing, a pad support secured to said motor, first and second elongated rows of spaced plastic columns located on opposite sides of said motor and located between said housing and said pad support, a shaft in said motor, a rotor mounted on said shaft, a compressed air duct in said motor for conducting compressed air to said rotor, an eccentric housing mounted on said shaft, a chamber in said eccentric housing, at least one bearing in said eccentric housing, said pad support being secured to said eccentric housing, said first and second rows of spaced plastic columns having lower ends proximate said pad support and have higher ends proximate said housing, first bar members located at said lower ends of each of said first and second rows of plastic columns, second bar members located at said upper ends of each of said first and second rows of plastic columns, an upper plate in said housing, an upper bearing in said upper plate supporting said shaft, a first clearance between said upper plate and said shaft, a second clearance between said shaft and said housing, another duct in said shaft in communication with said chamber and in communication with said first clearance through said upper bearing and said second clearance, a pad connected to said eccentric housing, a face on said pad support on the opposite side thereof from said eccentric housing, said orbital sander having a vertical centerline, and said orbital sander having a height dimension from the top of its housing to said face of said pad which is not greater than about 98 millimeters.
An orbital sander comprising a housing, a compressed air motor in said housing, a pad support secured to said motor, first and second elongated rows of spaced plastic columns located on opposite sides of said motor and located between said housing and said pad support, a shaft in said motor, a rotor mounted on said shaft, a compressed air duct in said motor for conducting compressed air to said rotor, an eccentric housing mounted on said shaft, a chamber in said eccentric housing, at least one bearing in said eccentric housing, said pad support being secured to said eccentric housing, said first and second rows of spaced plastic columns having lower ends proximate said pad support and have higher ends proximate said housing, first bar members located at said lower ends of each of said first and second rows of plastic columns, second bar members located at said upper ends of each of said first and second rows of plastic columns, means in said motor for conducting compressed air to said chamber, said first and second bar members being molded integrally with each said first and second rows of spaced columns, and said columns having at least one reduced cross sectional area between their ends.
Dependencies are inferred from the claim text.