Forceps with slider adjustment

Details Forceps with slider adjustment Forceps with slider adjustment

2000-01-11

2001-06-19

Recla, Henry J. (Department: 3731)

Surgery

Instruments

Tweezers

C606S107000

Reexamination Certificate

active

06248123

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention relates generally to forceps type apparatus with sensitive adjustment, and more specifically, concerns improvements in surgical forceps type instruments responsive to finger pressure.
There is continual need for improvements in forceps adjustability and sensitivity to manual adjustment; and in particular for improvements as are described herein, to provide unusual advantages as will appear.
SUMMARY OF THE INVENTION
It is a major object of the invention to provide improved instrumentation meeting the above-described need.
Basically, the herein-described apparatus is used for manipulation of a gripped element employed as for example in surgery, which includes:
a) two elongated lever arms, each of which has a distal first zone, and a second zone or zones rearward of the distal first zone, and a handle from which the arms extend forwardly,
b) the arms supported so that the first distal zones are yieldably urged toward one another by the arms to hold the gripped element therebetween,
c) a pusher movable between the arms to pivot one arm relative to the other arm in response to controllable force exertion to the pusher, from a location outside the arms, thereby to cause the first zones to relatively move, enabling gripping or release of the element.
As will be seen, the gripped element may be positioned between the forceps arm first distal zones, to be released or gripped in response to arm pivoting.
Another object is to provide a slider slidable externally of such arms, to operate a pusher having camming engagement with at least one of the arms, at the second zone or zones. The pusher may be carried or positioned between the arms, for such camming engagement, as for example with slide camming surfaces of both arms, in response to sliding movement of the slider along one of the arms. A connector may be used to interconnect the slider and pusher, and to pass through one of the arms.
A further object is to provide a space between the arms, to receive the pusher inwardly of the slider, for adjusting the spreading of the arms, in infinitely and sensitively adjustable manner as the slider is displaced.
An additional object is to provide a method of manipulating an element to be gripped for use in surgery, which includes
a) providing two elongated lever arms, each of which has a distal first zone, and a second zone or zones rearward of the distal first zone, and providing a handle from which the arms extend forwardly,
b) the arms supported so that the first distal zones are yieldably urged toward one another by the arms to hold the gripped element therebetween,
c) at least one of the arm second zones configured to pivot relative to the other arm in response to controllable force exertion acting between the arms,
d) and from the exterior of the arms, exerting controlled force acting between the arms to cause at least one arm to pivot relative to the other arm for enabling gripping or release of the element by the first distal zones,
As referred to, an arm pusher may be provided via which such controllable force is applicable to the arms to cause at least one arm to pivot relative to the other arm; and the pusher may be positioned between the second zones of the two arms to have sliding engagement with the arms, in response to finger pressure on a slider located exteriorly of the arms.
A yet further object is to exert controllable force on the pusher, via the slider, to cause the pusher to controllably and relatively spread the arms in response to sliding engagement therewith, and with space provided between the arms to receive the user's finger to operate the pusher. The method may also include accurate release of the element, by exerting highly sensitively adjustable force on the slider.
A further object is to provide for pusher camming engagement with at least one of the arms so as to provide mechanical advantage whereby pusher displacement by an amount d
1
exceeds relative spreading of the two arm distal zones by an amount d
2
, expressed as d
1
>d
2
.
These and other objects and advantages of the invention, as well as the details of an illustrative embodiment, will be more fully understood from the following specification and drawings, in which:


REFERENCES:
patent: 125311 (1872-04-01), Lucas
patent: 581810 (1897-05-01), Clarkson
patent: 775034 (1904-11-01), Grape
patent: 3409954 (1968-11-01), Schneider
patent: 4324248 (1982-04-01), Perlin
patent: 4337774 (1982-07-01), Perlin
patent: 4991267 (1991-02-01), Apperson et al.
patent: 5732921 (1998-03-01), Lemire
patent: 5776139 (1998-07-01), McDonald

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