Brushing – scrubbing – and general cleaning – Implements
Reexamination Certificate
1999-09-10
2001-09-11
Spisich, Mark (Department: 1744)
Brushing, scrubbing, and general cleaning
Implements
C015S104030, C015S104050, C029S081020, C294S061000
Reexamination Certificate
active
06286171
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a device for removing debris from a threaded or otherwise machined cavity. The present invention is particularly well suited for use with metallic or like substances, but is also applicable to wood, plastics and other materials.
BACKGROUND OF THE INVENTION
Machine techniques for creating a threaded bore in a desired item or material (e.g., a nut, pipe, plate, etc.) are known in the art. These procedures are generally referred to as “tapping” procedures. A byproduct of the tapping process is errant particles (dust, chips, flakes, etc.) of the material that was tapped. These particles may become lodged in the threaded hole and obstruct insertion of a bolt or cause a misthread.
The prior art has devised various methods of removing or extracting these particles. A first includes use of an air pneumatic pressure gun or the like to drive particles out of the cavity. Disadvantageous aspects of this approach include that (1) the pneumatic device is undesirably loud and (2) the use of air pressure to remove particles creates dust which may cause an inhalation problem and increases the likelihood of a particle becoming lodged in a worker's eye, amongst other occupational safety concerns.
Another type of prior art particle extraction device is disclosed in U.S. Pat. No. 5,339,473, issued to Crist on Aug. 23, 1994, for a Tapping Chip Extractor Tool. While this device has a magnetic tip that attracts metallic tapping particles, the device is disadvantageous in that it does not work on non-metallic material, it is limited to one size and it is generally inflexible. The use of inflexible extraction articles increases the possibility of damage to threads, particularly in high tolerance situations.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a particle extraction device that is applicable to all materials.
It is another object of the present invention to provide a particle extraction device that is flexible to accommodate different size bore holes and different angles of insertion.
It is also an object of the present invention to provide a particle extraction device that positively retains particles extracted from a bore hole.
These and related objects of the present invention are achieved by use of an apparatus for removing debris from a machined or threaded cavity as described herein.
In one embodiment, the present invention includes an apparatus for extracting debris from a machined or threaded cavity that has an extraction member formed at least in part as a flexible coil and a handle member coupled to the coiled extraction member.
The attainment of the foregoing and related advantages and features of the invention should be more readily apparent to those skilled in the art, after review of the following more detailed description of the invention taken together with the drawings.
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patent: 2244641 (1991-12-01), None
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Adamson Steven J.
Spisich Mark
LandOfFree
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