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US 5,351,447 AGranted
Inflatable sanding drum
OwnerRobert J. Grauertinventor
Life of this patent
Estimating the term…
Abstract
An inflatable sanding drum used for a drill or a lathe to said a wood has a cover between an abrasive member and a rubber bladder which defines an air chamber of the roller. Thus, even if the abrasive member is worn out by the friction with the wood surface, the rubber bladder is protected from damage. When the cover is damaged, it may be replaced with a new cover thus reducing the risk of damage to the rubber bladder.
Claims7
A device for use with an abrasive member and an abrading machine so as to abrade a predetermined surface area, said device comprising:
- a connection member connectable to the abrading machine so as to be rotated, said connection member includes:
- a pipe having a first end and a second end,
- a distal end portion inserted into said first end of said pipe, said distal end portion connectable to the abrading machine,
- a proximal end portion inserted into said second end of said pipe, and
- a junction rod inserted into said pipe, said junction rod securing said distal end portion and said proximal end portion in said pipe, wherein said distal end portion and said proximal end portion each have thread holes, and said junction rod has two threaded ends each engagable with a respective one of said thread holes of said distal end portion and proximal end portion;
- air-chamber forming means coupled to said connection member for forming an air chamber with a desired air pressure around said connection member, said air-chamber forming means comprising a chamber wall which defines said air chamber;
- a cover member attached to said chamber wall of said air-chamber forming means so as to cover said chamber wall, wherein;
- the abrasive member is attached to said cover member and is rotatable with said connection member so as to abrade the predetermined surface.
5 more elements
Dependencies are inferred from the claim text.