Tools – Wrench – screwdriver – or driver therefor – Machine
Reexamination Certificate
1998-06-29
2001-05-15
Meislin, D. S. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Machine
Reexamination Certificate
active
06230589
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to power tools, and in particular to fluid operated power tools for elongating and relaxing threaded connectors.
The power tools of the above mentioned general type are known in the art. One of such power tools is disclosed in my U.S. Pat. No. 5,499,558. The power tool disclosed in this patent has tool means with two interreacting tool portions including a driving portion and a housing portion, and sleeve means including a first outer sleeve, a second inner sleeve connected by a thread with said outer sleeve, and a friction ring. The tool portions cooperate with the sleeves, so that the outer sleeve is turned and as a result the inner sleeve is moved axially and displaces a threaded connector engaged by the inner sleeve to elongate or to relax the threaded connector. The above described power tool can be further modified.
SUMMARY OF THE INVENTION
Accordingly, it is an object of present invention to provide a power tool of the above mentioned general type, which is a further modification of existing power tools.
In keeping with these objects and with others which will become apparent hereinafter, one feature of present invention resides, briefly stated, in a power tool which has an axis and includes two interreacting tool portions which are coaxial with the axis, the interreacting tool portions include a driving portion and a housing portion arranged so that during an operation of the power tool the driving portion has a tendency to turn in one direction at a given force while the housing portion has a tendency to turn in an opposite direction at a same given force; sleeve means including a first outer sleeve and a second inner sleeve connected with one another by a thread so that the outer sleeve is turnable relative to the inner sleeve around the axis; and a friction ring axially moveably connected to the inner sleeve; and connecting means including first connecting means which connect the driving portion with the outer sleeve, and second connecting means which connect the housing portion with the inner sleeve, the connecting means being formed so that during the operation of the power tool, the inner sleeve axially displaces relative to at least one of the interreacting tool portions which are coaxial with said axis, the interacting tool portions including a driving portion and a housing portion arranged so that during an operation of the power tool the driving portion turns in one direction at a given force while the housing portion turns in an opposite direction at a same given force, sleeve means including a first outer sleeve and a second inner sleeve connected with one another by a thread so that the outer sleeve is turnable relative to the inner sleeve around the axis, a friction ring axially moveably connected to the inner sleeve, so that when the outer sleeve is turned on said friction ring, the inner sleeve moves axially and displaces axially a threaded connector engageable by the inner sleeve, first connecting means for connecting the driving portion with the outer sleeve, and second connecting means for connecting the housing portion with the inner sleeve, the connecting means being formed so that during the operation of the power tool, the inner sleeve axially displaces relative to at least one of the interacting tool portions, and a ring-shaped member which is separate from and connected with the driving portion and which is also connected with the first connecting means.
The novel features which are considered as characteristic for the present invention are set forth in particular in the appended claims. The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.
REFERENCES:
patent: 4047456 (1977-09-01), Schotz
patent: 4104934 (1978-08-01), Raschke et al.
patent: 5499558 (1996-03-01), Junkers
patent: 5539970 (1996-07-01), Junkers
patent: 0 708 259 (1996-04-01), None
Meislin D. S.
Striker Michael J.
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