Power plants – Motor having exhaust fluid treating or handling means – Including exhaust flow directing or dividing device
Reexamination Certificate
1999-02-11
2001-03-13
Ryznic, John E. (Department: 3745)
Power plants
Motor having exhaust fluid treating or handling means
Including exhaust flow directing or dividing device
C173S171000
Reexamination Certificate
active
06199383
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to pneumatic tools, and more particularly, to protective boots therefor.
2. Description of the Prior Art
Protective boots for disposal about the housing of a pneumatic tool have previously been provided to afford protection to the tool. Users, however, often do not see any reason to use these boots and often either do not use the boots, or do not replace damaged boots. Consequently, the pneumatic tools often become damaged.
Additionally, deflectors have been affixed to the housing of a pneumatic tool in front of a forward-facing exhaust port to deflect exhaust air away from the workpiece the tool is engaging. The deflectors aid in preventing exhaust air from causing dust or other debris from being blown about and inhaled, or ingested, by a user. These deflectors, however, can create back pressure in the tool which lowers the output torque of the tool.
SUMMARY OF THE INVENTION
It is a general object of the invention to provide an improved pneumatic tool which avoids the disadvantages of prior pneumatic tools while affording additional structural and operational advantages.
An important feature of the invention is the provision of a pneumatic tool which is of relatively simple and economical construction.
A further feature of the invention is the provision of a tool of the type set forth which diverts exhaust air emerging from the tool exhaust port without creating back pressure.
Another feature of the invention is the provision of a tool of the type set forth which diverts exhaust air from the vicinity of the work piece.
With regard to the above two features, another feature of the invention is the provision of a protective boot with a deflector for diverting the exhaust air, which encourages a user to maintain the protective boot on the housing of the tool.
Certain ones of these or other features may be attained by providing a combination including a pneumatic air tool having a housing and an exhaust port for transmitting exhaust air from the tool along a path, and a protective boot disposed about the housing and having a deflector disposed in the path of the exhaust air for redirecting the exhaust air.
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Ryznic John E.
Shaw Seyfarth
Snap-on Tools Company
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