Cutlery – Razors – With cooperating shearing blades
Patent
1994-11-07
1997-03-18
Payer, Hwei-Siu
Cutlery
Razors
With cooperating shearing blades
B26B 1904
Patent
active
056111452
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to dry-shaving apparatus comprising a drive provided in a housing and at least two parallel shaving units each consisting of a respective outer cutter, an inner cutter and at least one biasing element.
One example of such dry-shaving apparatus is known from DE-C-3 926 894. In one embodiment each outer cutter is secured on a shaving head frame arranged on the housing. The inner cutters are mounted on a common coupling element which is connected to a drive element of an electrical drive. Each inner cutter is pressed against the associated outer cutter by means of a respective spring element. The two spring elements each have an appropriate characteristic in order to ensure good engagement of the inner cutter with the outer cutter. According to a further embodiment the outer cutter is mounted on a removable frame coupled to the shaving head frame, which is pivotably mounted on the housing of the dry-shaving apparatus.
A dry-shaving apparatus having four parallel shaving units is known from U.S. Pat. No. 3,589,005. The two outer shaving units, constructed as short hair cutters, each consist of an outer cutter, an inner cutter and a spring element arranged between a drive element and the inner cutter. Between the two outer shaving units are provided two comb-like long hair cutters, each of which consists of a toothed cutting comb and an associated toothed cutting blade, particularly for trimming. For this purpose, these toothed long hair trimmers are mounted for adjustment, both together and also independently of one another, relative to the short hair cutters. Other dry shavers are known from U.S. Pat. No. 4,797,997 and GB-A-2 036 631.
An object of the present invention is to provide a dry-shaving apparatus of the type initially defined in which engagement of the shaving units with the skin to be shaved is improved in a simple manner. Moreover, some embodiments of the invention should permit combination shaving, i.e. simultaneous cutting of long and short hairs.
According to one aspect of the invention, apparatus of the type initially defined is characterised in that the biasing element of one of the shaving units has a characteristic which differs from that of the biasing element of a further of the shaving units and is dimensioned such that under the influence of externally applied force onto the shaving units movement may be performed by said one of the shaving units relative to the further shaving unit.
According to a further aspect of the invention, there is provided dry-shaving apparatus of the type initially defined characterised in that each cutter and associated biasing element are mounted within the associated shaving unit to be removable as a part of the shaving unit.
According to another aspect of the present invention, there is provided dry-shaving apparatus comprising: a shaver body; a removable shaver head comprising at least two intercoupled shaving units each having an open-bottomed arched shaving foil mounted for movement relative to the shaver body; an inner cutter inside the arch of each foil and mounted for reciprocatory movement along the axis of the foil while subject to a biasing force which maintains the inner cutter pressed into contact with the foil to achieve a shaving action on the foil; a biasing element for each cutter to provide the biasing force; and drive means to provide the reciprocatory movement while accommodating movements of each cutter transverse to the direction of the reciprocatory movement, characterised in that: each cutter and associated biasing element are mounted within the associated shaving unit to be removable as a part of the shaver head.
In one embodiment, each biasing element acts between the associated cutter and a support on the associated shaving unit.
Conveniently, the drive means comprises a pin which locates within a slot in the driven cutter, the slot being elongate in the transverse direction of the cutter to permit relative transverse movement of the drive pin and cutter, so that the drive pin need not follow the trans
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Parsonage Raymond G.
Royle Terence G.
Wetzel Matthias
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