Tool driving or impacting – Means to drive tool about an axis – Fluid motor
Reexamination Certificate
1997-08-07
2001-05-01
Vo, Peter (Department: 3721)
Tool driving or impacting
Means to drive tool about an axis
Fluid motor
C081S057390
Reexamination Certificate
active
06223836
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a fluid-operated power tools.
Fluid-operated power tools are known and used in many applications. A fluid-operated tool has an engaging part which engages a threaded connector to be turned, such as a nut, a bolt and the like, and a drive part in which a fluid-operated drive is arranged. The drive includes usually a cylinder, and a piston movable in the cylinder and connected with the engaging element of the engaging part. In many applications, the space for reaching a threaded connector is extremely narrow and therefore attempts have been made to make the tool as thin as possible. These attempts have been mainly concentrated on reducing the thickness of the engaging part, since the engaging part to be close to the height of the nut (a part of the threaded connector) has to enter a narrow space and to be fitted with its opening on a threaded connector or to be inserted with its projecting shaft into a threaded connector. However, no attempts have been made to reduce the tool as a whole. In many applications, however the whole tool has to be introduced into a very narrow space, including the drive part as well. With the conventional substantial thickness of the drive part, this is impossible in many instances unless one compromises the power output of the drive part or increases the lever portion of the engaging part accordingly. Apart from the obvious weight increase, the tool becomes higher and longer with the increase in leverage and the increase in piston movement to retain the same turning degrees per stroke. This in turn makes the tool less applicable in limited clearance applications.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a fluid-operated power tool which avoids the disadvantages of the prior art.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a fluid-operated power tool which has an engaging part including an engaging element for engaging and turning a part of a threaded connector (a nut); and a drive part including a fluid-operated drive with a cylinder and a piston movable in the cylinder for turning the engaging element under the action of fluid admitted to the cylinder, the power drive part having a width which does not substantially exceed a width of the engaging part, which in turn does not substantially exceed the height of the nut. For this purpose, the width of the cylinder can be smaller than its height without reducing the square inch area of the piston and its force output.
When the fluid-operated power tool is designed in accordance with the present invention, it avoids the disadvantages of the prior art. The tool as a whole has a very small thickness and can be used in narrowclearance applications when a space for reaching a threaded connector is exceptionally narrow.
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: 3669012 (1972-06-01), Nebel
patent: 3802517 (1974-04-01), Cooke-Yarborough
patent: 4031893 (1977-06-01), Kaplan et al.
patent: 4756241 (1988-07-01), Sakurahara et al.
patent: 4896584 (1990-01-01), Stoll et al.
patent: 4938296 (1990-07-01), Brazell, II
patent: 4938745 (1990-07-01), Sagstetter
patent: 5003847 (1991-04-01), Wagner
patent: 5076225 (1991-12-01), Tokoro et al.
patent: 5203238 (1993-04-01), Ferguson
patent: 5327864 (1994-07-01), Regueiro
patent: 5544627 (1996-08-01), Terziev et al.
patent: 5630353 (1997-05-01), Mittlefehldt et al.
Paradiso John
Sheridan & Ross P.C.
torcUp, Inc.
Vo Peter
LandOfFree
Fluid-operated power tool does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fluid-operated power tool, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fluid-operated power tool will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2518867