Abrading – Frame or mount – Rotary tool supporter
Reexamination Certificate
2000-11-27
2001-11-27
Banks, Derris H. (Department: 3723)
Abrading
Frame or mount
Rotary tool supporter
C451S296000
Reexamination Certificate
active
06322432
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a sander assembly, and more particularly to a sander assembly having a working table that may be adjusted up and down relative to an upper sander device to move the work pieces upward toward or downward away from the upper sander device.
2. Description of the Prior Art
Typical sanders comprise one or more sander wheels or the like rotatably supported on a fixed table. The workers have to move the work pieces across the table and to move the work pieces relative to and toward and away from the sander wheels in order to sand the work pieces with the sander wheels.
The applicant has developed a different sander disclosed in U.S. Pat. No. 5,582,539 to Wang and having a sander wheel provided above the working table and movable upward and downward toward the working table to sand the work pieces disposed on the working table. However, a complicated configuration is required to be provided for moving the sander wheel upward and downward relative to the working table.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages of the conventional sanders.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a sander assembly including a working table that may be adjusted up and down relative to an upper sander device to move the work pieces upward toward or downward away from the upper sander device.
In accordance with one aspect of the invention, there is provided a sander assembly comprising a base, a sander device provided above the base, a working table slidably supported between the base and the sander device for supporting work pieces to be sanded thereon, and means for moving the working table toward and away from the sander device.
The working table includes one or more poles extended downward therefrom and slidably engaged in the base. The moving means includes one or more bolts rotatably received in the base and threaded with the poles respectively to move the poles relative to the base when the bolts are rotated relative to the poles and the base. The bolts are coupled together by a shaft and rotated in concert with each other.
A rotating device is further provided for rotating the bolts and includes a hand wheel rotatably secured to the base and coupled to the bolts for rotating the bolts. The poles each includes an extension extended therefrom and threaded with the bolts for allowing the poles to be moved up and down by the bolts when the bolts are rotated relative to the poles respectively.
The sander device includes a first wheel rotatably supported above the base, and means for driving the first wheel and having a motor, and means for coupling the motor to the first wheel and to driven the first wheel.
The base includes a post extended upward therefrom, the sander device includes a frame secured on the post, the first wheel is rotatably supported in the frame with an axle.
The sander device further includes a second wheel rotatably provided above the first wheel, and a sander belt engaged over the first and the second wheels. A biasing device is further provided for biasing the first wheel and the second wheel away from each other to tighten the sander belt. Another device is further provided for vibrating the second wheel and the sander belt.
The sander device includes a bracket for rotatably supporting the second wheel with a spindle, and the vibrating means includes an eccentric weight rotatably supported in the bracket and coupled to the spindle for being rotated by the spindle to generate and provide a vibration to the bracket and the second wheel and the sander belt.
Further objectives and advantages of the present invention will become apparent from a careful reading of a detailed description provided hereinbelow, with appropriate reference to accompanying drawings.
REFERENCES:
patent: 3718168 (1973-02-01), Berends
patent: 3888049 (1975-06-01), Macsween
patent: 5582539 (1996-12-01), Wang
patent: 5988239 (1999-11-01), Chen
patent: 6106388 (2000-08-01), Green
patent: 6146254 (2000-11-01), Wang
Banks Derris H.
Baxley Charles E.
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