Cutlery – Razors – Curved edge
Patent
1991-05-16
1992-10-13
Watts, Douglas D.
Cutlery
Razors
Curved edge
3034657, B26B 2100
Patent
active
051539926
DESCRIPTION:
BRIEF SUMMARY
This invention relates to safety razors, more particularly in which a blade member is in the form of a foil having a plurality of sharp edged apertures distributed over its surface to constitute a plurality of discrete cutting edges. Such blade members are referred to in the following description as "perforated blades".
In accordance with the invention, there is provided a safety razor comprising a perforated blade mounted in a foil holder and having a sharpened, rectilinear trimming edge means.
Preferably, the said edge means is normally inaccessible for use but can be brought into operation by effecting displacement of at least a part of the foil holder relative to the razor handle.
The razor can accordingly operate normally as a perforated blade razor, typically being employed with a reciprocating, "scrubbing" action, but the sharpened edge means can be brought into use as required for trimming operations, such as the trimming of sideburns or moustaches.
Some forms of razor in accordance with the invention are described in detail below, by way of example, with reference to the accompanying drawings, in which:
FIGS. 1 and 2 are perspective views of a razor with its parts adjusted into a shaving mode and a trimming mode, respectively;
FIGS. 3, 4 and 5 are sectional views showing the razor parts in a normal shaving mode, a fixed position and the trimming mode, respectively;
FIG. 4A is a scrap detail view taken in the direction of arrow `A` in FIG. 4;
FIG. 6 is a perspective view of the head of a second form of razor;
FIGS. 7 and 8 are sectional views showing parts of the second razor in its normal and trimming positions, respectively;
FIGS. 9 and 11 show a third form of a razor in its different operative positions; and
FIGS. 10 and 12 are scrap views illustrating details of the razor of FIGS. 9 and 11.
The razor shown in the drawings comprises a perforated blade 1 in the form of a foil having sharp-edged apertures 2 distributed over its surface and having one longitudinal edge sharpened to form a trimming edge 3.
The blade is attached to a foil carrier 5 mounted in turn on a support 6 including a guard member 7 and depending lugs 8 by which the support 6 is mounted on cams 9 fast with the razor handle 10.
The support 6 is mounted on the handle in a manner which permits free, rocking movement of the support, relative to the handle, about an axis parallel with the trimming edge 3. This is conveniently provided by means of a pair of stationary, arcuate cams 9 fast with the handle, which engage in arcuate grooves in the lugs 8 of the support. The centre of curvature of the cams and grooves is disposed close to the surface of the foil, for example at the axis `C` indicated in the drawings.
The carrier has a range of free, rocking movement during normal shaving to permit additional conformance of the foil to the skin contours. However, to expose the trimmer edge, the support must first be latched into its fixed position, shown in FIG. 4, at one end of its range of rocking movement. For this purpose, a latch projection 14 is formed on one or both lugs 8 for co-operation with an adjacent portion on the cam 9. As best seen in FIG. 4A, the latch projection 14 takes the form of a triangular fillet which presents a stop to free rocking movement of the support in normal use of the razor. However, the user can apply some manual effort to force the cam to spring past the projection 14 into the position shown in FIG. 4.
The support 6 includes a platform section 11 fast with the remainder of the support and onto which the foil carrier is clipped in a bi-stable manner. In the "normal" and "fixed" positions shown in FIGS. 3 and 4, the platform 11 is fully engaged in a channel formed in the underside of the foil carrier. However, due to the resilience of the parts, the carrier can be displaced angularly relative to the support, to the position shown in FIG. 5, in which the forward (left-hand) edge of platform section 11 has snapped past a detent projection 13 formed on the foil carrier. This exposes the sharpened edge for tri
REFERENCES:
patent: 4803780 (1989-02-01), Locke et al.
Brown Frank E.
Taylor John
Wilks David J.
The Gillette Company
Watts Douglas D.
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