Cutlery – Razors – With cooperating shearing blades
Patent
1991-11-22
1992-11-03
Watts, Douglas D.
Cutlery
Razors
With cooperating shearing blades
30 4391, B26B 1900, B26B 1902
Patent
active
051597551
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a dry shaving apparatus comprising a drive mechanism arranged in a housing, a shaving head frame mounted on the housing, a pair of shaving heads extending in longitudinal direction parallel with each other and including each an upper cutter and a lower cutter and being movable vertically relative to and parallel with each other, a first hinged frame mounted in the shaving head frame and carrying the upper cutters for control of the relative movement of the upper cutters, and a second hinged frame carrying the lower cutters and coupled to the drive mechanism.
A dry shaving apparatus of the type initially referred to is known from EP-A No. 0 267 044. The hinged frame assembly arranged outside the housing intermediate the drive arm and the two inner cutters is comprised of a drive block pivotally mounted on the drive arm transversely to the longitudinal axis of the inner cutters and having a recess extending parallel to the longitudinal axis of the inner cutters, of a rigid mounting frame pivotally carried in this recess and having two pins arranged at its respective outer ends, and of a pair of U-shaped, parallel yoke members whose legs are provided with bores at their respective ends for pivotally receiving the pins on the rigid frame. Secured to the upper side of each U-shaped yoke member is an inner cutter carried by a double cantilever spring.
It is an object of the present invention to provide, for a shaving apparatus of the type initially referred to, a control arrangement for the two elongate lower cutters by means of which the guiding of the lower cutters is improved in both the vertical and the horizontal direction.
According to the invention, this requirement is satisfied in an apparatus of the type initially referred to in that the second hinged frame is comprised of two side members movable vertically and horizontally, a first pair of transverse link members slidably and pivotally carried in the housing, and a second pair of transverse link members pivotally carried in the housing, in which the first pair of transverse link members is coupled to the side members by means of pivot joints and the second pair of transverse link members is coupled to the side members by means of pivot and slide joints.
The configuration and mounting of the second hinged frame in the housing ensures an exact parallel arrangement and alignment of the two lower cutters on the associated side members of the second hinged frame, as well as an exact parallel movement of the two lower cutters relative to each other in vertical direction, in addition to ensuring an oscillating movement in the horizontal direction. Accordingly, the two lower cutters are linearly driven via the vertically and horizontally movable side members of the second hinged frame, while their parallel relationship is maintained. The mounting of the second hinged frame in the housing protects the hinged frame against contamination as, for example, hair dust, thus ensuring a perfect function of its movably carried components. The coupling of the lower cutters by the second hinged frame facilitates the removal of the shaving head frame equipped with upper cutters vertically movable relative to each other from the shaver housing and its replacement.
In an embodiment of the present invention, three mounting pins are arranged on each transverse link member of the first pair of links, with the center mounting pin being equidistant from the opposite outer mounting pins. Preferably, the center mounting pin forms an isosceles triangle with the opposite outer mounting pins.
For the purpose of coupling the transverse link members of the first pair of links to the side members, locking elements are provided on the outer mounting pins arranged opposite to each other.
In accordance with the invention, four mounting pins are arranged on each transverse link member of the second pair of links, with the two center mounting pins being equidistant from the opposite outer mounting pins and, lying on a common axis and pointing to opposed directions,
REFERENCES:
patent: 2318351 (1943-05-01), Alexay
patent: 4796359 (1989-01-01), Oprach et al.
patent: 4797997 (1989-01-01), Packham et al.
patent: 4805300 (1989-02-01), Miska
patent: 4930217 (1990-06-01), Wolf et al.
Jestadt Albrecht
Schafer Gerhard
Wolf Jurgen
Braun Aktiengesellschaft
Heyrana Sr. Paul M.
Watts Douglas D.
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