Tools – Wrench – screwdriver – or driver therefor – Flexible
Reexamination Certificate
1999-06-03
2001-03-06
Scherbel, David A. (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Flexible
Reexamination Certificate
active
06196090
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a strap wrench for turning an object of cylindrical overall shape in one direction. This type of wrench includes a part forming a handle, and a strap, particularly made of metal, in the form of a loop, the two opposite strand parts of which cooperate with two zones secured to the handle when the strap is wrapped tightly around the object.
The handle is equipped, between the two zones, with a shoe for pressing against the object. The pressing shoe is not connected to the strap and has a bearing face of cylindrical overall shape with its generatrices at right angles to the overall plane of the strap.
The invention applies particularly to oil filter wrenches for motor vehicles and, in what follows, reference will be made to this application.
2. Description of Related Art
Examples of such strap wrenches are described in FR-A-1,570,027 and in EP-A-0,618,045 in the name of the Applicant Company.
In these known strap wrenches, the shoe is secured rigidly to the handle. As a result, when the space available around the oil filter allows the wrench to be turned only by a limited amount, the operator has to perform repetitive manipulations of shortening/lengthening the useful length of the strap, using a knurled knob which forms part of a screw-nut mechanism for adjusting the strap.
SUMMARY OF THE INVENTION
The object of the invention is to make strap wrenches easier to use in a particularly ergonomical way.
To this end, the subject of the invention is a strap wrench of the aforementioned type, characterized in that the shoe is pivot-mounted with respect to the handle so that it can pivot about a geometric axis associated with the handle and at right angles to the overall plane of the strap. This axis is located in such a way that when the shoe and the strap are both clamped tightly against the object, action on the handle exerted in a first direction causes the object to be turned and, exerted in the other direction, causes the shoe and the strap to slip on the object.
REFERENCES:
patent: 775581 (1904-11-01), Rothenbucher
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patent: 1186919 (1916-06-01), Law
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patent: 1666353 (1928-04-01), Schelf
patent: 2566108 (1951-08-01), Anderson
patent: 3200676 (1965-08-01), Pagel
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patent: 29 10 563 (1980-09-01), None
patent: 0 618 045 (1994-10-01), None
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patent: 2 229 949 (1990-10-01), None
Danganan Joni B.
Facom
Scherbel David A.
Wenderoth , Lind & Ponack, L.L.P.
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