Cutlery – Razors – With cooperating shearing blades
Patent
1991-11-22
1993-08-03
Yost, Frank T.
Cutlery
Razors
With cooperating shearing blades
B26B 1902
Patent
active
052317617
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 a drive member of the drive mechanism, in which the second hinged frame is comprised of a frame coupled to the drive member so as to be pivotal about the longitudinal axis x--x as well as of two mounting members coupled to the frame by means of pivot joints and being movable relative to and parallel with each other.
A dry shaving apparatus of the type initially referred to is known from EP-A-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 in vertical direction is improved.
According to the invention, this requirement is satisfied in an apparatus of the type initially referred to in that a connecting member is arranged intermediate the mounting members, and a hinge joint exists between the connecting member and the respective mounting member.
The configuration and mounting of the second hinged frame on the drive member extending out of the housing of the dry shaving apparatus ensures an exact parallel coupling and alignment of the two lower cutters on the associated mounting 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 a linear oscillating movement in horizontal direction. Accordingly, the two lower cutters are linearly driven via the vertically movable mounting members of the second hinged frame, while their parallel relationship is maintained. 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 invention, the pivot joints are formed of mounting bores provided in the respective end walls of the mounting members and of mounting pins provided on the frame for engagement in these bores. Preferably, the hinge joint between the connecting member and the respective mounting member is formed by film hinges.
In accordance with the invention, the one pivot joints as well as the one hinge joint between the mounting member and the connecting member are disposed on a common vertical axis y--y, and the other pivot joints as well as the other hinge joint between the mounting member and the connecting member are disposed on a common vertical axis z--z extending parallel to the axis y--y.
Conveniently, the drive member is coupled to the frame by means of two pivot joints. The pivot joints are preferably formed of balls carried in the respective ends of the drive member and of bearing sockets formed in the insides of the respective end walls of the frame. To enable the se
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Heintke Hans-Eberhard
White Robert
Braun Aktiengesellschaft
Heyrana Sr. Paul M.
Yost Frank T.
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