Cutlery – Combined cutlery or combined with ancillary feature – With material-holder or disposal
Patent
1991-02-14
1992-12-15
Watts, Douglas D.
Cutlery
Combined cutlery or combined with ancillary feature
With material-holder or disposal
30135, B26R 102, B26R 104
Patent
active
051705591
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to rose-gripping shears of the type including a cutting blade connected to a first handle, an anvil connected to a second handle which is pivotally connected to the first handle, and a clamping piece urged by spring action against the anvil. Said shears are marketed by the firm of Wolf-Gerate GmbH of Betzdorf under the name RS-PA. The automatic gripping mechanism formed by the clamping piece firmly holds the material which has been cut off, i.e. the stems which have just been cut, so that even stems having thorns can be cut without scratching one's hands.
In the known shears, the clamping piece is mounted for movement around the pivot pin of the arms of the shears and one end of a leaf spring is riveted to a lug which engages behind the cutting blade, the other end of the spring resting within the arm of the shears constituting the anvil. In this way, the clamping piece can move rearward with respect to the cutting blade and firmly hold stems which have been clamped together with the anvil. This automatic gripping system operates dependably and assures, with a progressive cut, a smooth, carefully cut surface.
The object of the present invention is to simplify the automatic gripping system of shears of this type and reduce the cost of manufacture thereof without the favorable automatic gripping system being impaired.
This object is achieved by a clamping piece formed by a resilient plastic part.
Due to the fact that the plastic part which forms the clamping piece is resilient, the additional leaf spring required in the known shears can be dispensed with. By suitable development of a spring arm which connects the clamping plate to a mounting plate, a specific spring characteristic can be obtained. The mounting of the clamping piece is extremely simple, since it can be placed on together with the pivot pin which connects the arms of the shears, and the mounting is obtained by means of a form-locked fixing in position of the mounting plate.
One embodiment of the invention will be described below with reference to the drawing, in which:
FIG. 1 is a view of the shears of the invention, shown in closed, locked condition;
FIG. 2 is a view of the shears seen in the direction indicated by the arrow II in FIG. 1;
FIG. 3 is a rear view of the head part of the shears.
The shears have a first handle (10) of plastic which surrounds a metallic grip lever arm (12) which is of U-shaped cross section and continues upward into two mounting plates (14) which form the arms of the U-section and receive further parts of the shears between them. Between the two mounting plates there is inserted a first cutting blade (16), the bottom continuation (18) of which is fixed by means of a pin (20) in holes in the mounting plates (14). A pivot pin (22) represents the second point of connection between plates and cutting blade (16) so that the handle (10) is rigidly attached to the cutting blade (16).
A second handle (24) surrounds a second metal handle lever (26) which is of U-shaped cross section and continues in two mounting plates (28) which surround the mounting plates (14). The articulated connection of the mounting plates or handle levers is effected by the pivot pin (22). The second cutting blade, which is in the form of an anvil (30), has its bottom extension (32) guided for displacement between the plates (14) of the handle lever (12). The extension has a slot (34) into which there engages a pin (36) which is fixed between the two plates (14). The inwardly bent ends (38) surround the anvil bearing lever (40), and the connection being effected via a pivot pin (42). A restoring leaf spring (44) arranged within the second handle (24) has its upper movable end resting against the edge, located on the right in FIG. 1, of the plates (14) or cutting-blade extension (18), as a result of which the shears are urged into their open position. In their closed position, the shears can be locked by means of a slide pin (46) which is guided in slots (48) in the plates (14). In the locked position shown in FIG. 1, th
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patent: 4228707 (1980-10-01), Arlett
Orthey Gebhard
Riekel Helmut
Heyrana Sr. Paul M.
Watts Douglas D.
Wolf-Gerate GmbH
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