Cutlery – Cutting tools – Saw
Reexamination Certificate
1999-10-27
2001-07-03
Payer, Hwei-Siu (Department: 3724)
Cutlery
Cutting tools
Saw
C030S155000, C030S166300, C030S517000
Reexamination Certificate
active
06253455
ABSTRACT:
TECHNICAL FIELD OF THE INVENTION
This invention relates to a handsaw. In particular a known handsaw of this type comprises a long narrow blade provided with a toothing, as well as a handle, which on one hand has a fastening part to which a rear end of the blade is connected and, on the other hand, a long narrow gripping part, which extends at an obtuse angle to the fastening part and is shorter than the blade. The blade is connected to the fastening part of the handle via a hinge which permits turning of the blade in relation to the handle between an extended position and a retracted position. A locking mechanism enables the blade to be locked in at least the extended position thereof. The gripping part is composed of a stiff frame integral with the fastening part. The frame has two side walls interconnected via a mutual back between which side walls a long narrow gap is delimited, as well as a tooth protecting element having two second side walls interconnected via a common second back. Between the second side walls a second gap is delimited, the width of which is at least equally large as the distance between the outsides of the first side walls in order to enable insertion of the frame in said second gap. The tooth protecting element is articulatedly connected to the frame via a hinge connection situated near a rear and thereof. This connection permits turning of the tooth protecting element 180° between a first position in which said second side walls surround said first side walls, and the frame together with the tooth protecting element together serve as a gripping part, and a second position in which the tooth protecting element extends in the extension of the frame and the two gaps open towards the same direction in order to receive the toothing of the blade.
BACKGROUND OF THE INVENTION
From U.S. Pat. No. 5,647,129 there is known a retractable handhold tool in the form of a knife having a long narrow, edge-provided blade which, is retractable or foldable into a handle. In a working position, the handle extends in a linear extension of the blade and includes front and rear shell-like halves that are pivoted together.
The halves can be pivoted together to form a grippable handle, or the rear shell can be swung rearwardly by 180° to enable the blade to be swung into gaps formed by the respective shells. In this case, however, the two handle halves are so provided that the edge portions on the two side walls defining a central gap in each half, are abutted against each other in the working position of the handle, whereby the handle is somewhat thick and thus more difficult to tightly grip. Furthermore, when the blade is in its retracted or stored state, the cutting edge is completely concealed, whereby a user cannot tell what type of tool is being purchased, e.g. a straight edge or a serrated edge.
OBJECTS AND SUMMARY OF THE INVENTION
The present invention aims at obviating the abovementioned inconveniences of previously known tools of the retractable type and at providing an improved handsaw. Therefore, in one aspect of the invention a handsaw has a cutting edge, a short portion of which is visible when the blade is retracted in the gripping part of the handle, for the purpose of enabling a viewer to determine that the blade is a sawblade.
In another aspect of the invention the hinge by which a tooth protecting element of the handle can be swung between a working position and a retracted position, does not extend across the blade-receiving gap formed by the handle. Thus, the blade can be inserted deeply into the gaps.
REFERENCES:
patent: 698764 (1902-04-01), Tyler
patent: 1638749 (1927-08-01), Santoyo
patent: 4271592 (1981-06-01), Höptner
patent: 5093995 (1992-03-01), Jan
patent: 5647129 (1997-07-01), Stamper
patent: 5781998 (1998-07-01), Stamper
patent: 5924210 (1999-07-01), Hung
patent: 5926962 (1999-07-01), Chen
Eriksson Eckhard
Garras Staffan
Lindberg Staffan
Burns Doane Swecker & Mathis L.L.P.
Kapman AB
Payer Hwei-Siu
LandOfFree
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