Communications: electrical – Condition responsive indicating system – Specific condition
Reexamination Certificate
2002-08-07
2004-08-31
Swarthout, Brent A. (Department: 2636)
Communications: electrical
Condition responsive indicating system
Specific condition
C073S862210, C073S862230, C081S177100
Reexamination Certificate
active
06784799
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to wrenches, and more specifically, to a tension meter and wrench arrangement that displays the tension of the wrench upon operation of the wrench.
When operating a wrench, the user can only estimate the tension of the wrench by experience. However, it is not accurate to estimate the tension of the wrench by experience. When applied an excessively high torsional force to the wrench, the wrench may be forced to break, causing an accident. In order to eliminate this problem, wrenches with tension indicator means are developed.
FIGS. 7 and 8
show two ratchet wrenches with electronic type tension indicator means according to the prior art. Because the electronic type tension indicator means occupies much installation space, the installation of the electronic type tension indicator means affects the convenience of the operation of the wrench. Further, because the electronic type tension indicator means is disposed outside the wrench, it tends to be damaged accidentally.
SUMMARY OF THE INVENTION
The present invention has been accomplished under the circumstances in view. It is one object of the present invention to provide a tension meter and wrench arrangement, which accurately indicates the tension of the wrench during the operation of the wrench. It is another object of the present invention to provide a tension meter and wrench arrangement, which requires less installation space in the wrench. It is still another object of the present invention to provide a tension meter and wrench arrangement, which has means to protect the electronic parts thereof when not in use. According to one aspect of the present invention, the tension meter and wrench arrangement comprises a resistance type tension meter and an integrated device installed in a wrench, the integrated device providing a voltage output corresponding to the variation of resistance detected by the tension meter and converting the voltage output into digital signal for display through a display screen, the wrench having a sliding sleeve adapted for protecting the integrated device. According to another aspect of the present invention, a sliding sleeve is axially slidably mounted on the handle of the wrench and adapted for protecting the integrated device when the wrench is not in use.
REFERENCES:
patent: 2315521 (1943-04-01), Hart
patent: 4125016 (1978-11-01), Lehoczky et al.
patent: 4327611 (1982-05-01), Catanese et al.
patent: 4669319 (1987-06-01), Heyraud
patent: 4864841 (1989-09-01), Heyraud
patent: 4976133 (1990-12-01), Pohl
patent: 5109737 (1992-05-01), Raber
patent: 6092442 (2000-07-01), Macor
patent: 6463811 (2002-10-01), Putney
patent: 2003/0167884 (2003-09-01), Macor
Lai Anne V.
Swarthout Brent A.
LandOfFree
Tension meter and wrench arrangement does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Tension meter and wrench arrangement, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Tension meter and wrench arrangement will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3277268