Tools – Tool jaw – Crossed handles
Reexamination Certificate
2001-02-15
2003-03-18
Smith, James G. (Department: 3723)
Tools
Tool jaw
Crossed handles
C081S381000, C081S383000, C030S175000
Reexamination Certificate
active
06532847
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a pair of pliers that may cut an object with less force.
2. Description of the Related Art
FIG. 1
of the drawings illustrates a pair of conventional pliers that includes a cutting point
60
and a pivotal pin or axle
40
. Upon applying force to the handles of the pliers, an object held between the cutters is out at to cutting point
60
. Thc force-saving rate (leverage) for the pliers is the distance B between pivotal axis of the pin
40
and the force-applying point
70
divided by the distance A between pivotal axis of the pin
40
and the cutting point
60
. U.S. Pat. No. 3,308,692 to Sato issued on Mar. 14, 1967 discloses a plier-type tool including a stationary member, a movable jaw member, and a drive handle lever. The stationary member includes a jaw portion and a handle portion. The movable jaw is pivotally connected to the stationary member via a pivot between the jaw portion and the handle portion of the stationary member. The drive handle lover is pivotally connected through another pivot to the stationary member so as to cooperate with the handle portion of the stationary member. A pin fixed on the movable jaw member at its rear extension across to pivot between the jaw portion and the handle portion engages with a slot defined in the drive handle lever. Thus, the pin is slidable along the slot. It was found that the leverage of such a plier-type loot is insufficient, as the user still has to apply a relatively large force to cut an object held between the cutting edges of the jaw portion and the movable jaw member, respectively. The present invention is intended to provide a pair of pliers having a higher force-saving rate (leverage).
SUMMARY OF THE INVENTION
Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.
REFERENCES:
patent: 1796888 (1931-03-01), Davis
patent: 2370308 (1945-02-01), Hanson
patent: 2986962 (1961-06-01), Ford
patent: 3308692 (1967-03-01), Sato
patent: 5284487 (1994-02-01), Hartmeister
Kamrath Alan D.
Rider Bennett Egan & Arundel
LandOfFree
Force-saving pliers does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Force-saving pliers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Force-saving pliers will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3024013