Dry shavers
AssigneeThe Gillette Company
InventorsCharles C. Packham, Robert White, Steven Rogers
Life of this patent
Estimating the term…
Abstract
In a twin head dry shaver, the shaver heads are carried at the upper end of a four-bar mounting linkage comprising vertical side members 1A, 1B and bell crank links 2, 3 pivotally connected to the side members at points 7, 8 and 9, 11. The links are pivotally connected to the frame by pivot pins 4 and 6 set above and mid-way between the connections to the side members, thus rendering the heads highly sensitive to cut of balance forces acting on the heads so that they may move vertically, relative to each other to restore the balance.
Claims9
A dry shaver comprising a shaver frame, a pair of generally vertical, parallel side members mounted on said frame for vertical movement relative to each other and relative to said frame whilst constrained to remain parallel with each other, said side members being coupled together below their upper ends by at least one transverse link whose opposite ends are pivotally connected to the respective side member and which is pinned intermediate its ends to said frame for pivotal movement about an axis, and a pair of parallel, elongate shaver heads mounted on the respective upper ends of said side members, for movement relative to said shaver frame, each said shaver head comprising an outer foil and a reciprocating inner cutter mounted independently on said frame.
A dry shaver comprising a shaver frame, a pair of generally vertical, parallel side members mounted on said frame for vertical movement relative to each other and relative to said frame whilst constrained to remain parallel with each other, said side members being coupled together below their upper ends by at least one transverse link whose opposite ends are pivotally connected to the respective side members and which is pinned intermediate its ends to said frame for pivotal movement about an axis, and a pair of parallel, elongate shaver heads mounted on the respective upper ends of said side members for movement relative to said shaver frame, each said shaver head comprising an outer foil and a reciprocating inner cutter mounted imdependently on said frame, cutter drive mechanism coupled to said inner cutters and arranged to permit said inner cutters to follow the relative movements of said outer foils, said inner cutters being resiliently mounted on yokes having depending leg members connected for pivotal movement, about respective first axes, relative to a common mounting member which is in turn connected for pivotal movement about a second axis relative to said drive mechanism, the said first and second axes having the same geometrical and spatial relationship with each other as the pivotal connections between each link, said side members and said shaver frame.
A dry shaver comprising a shaver frame, two pair of generally vertical, parallel side members mounted on said frame for vertical movement relative to each other and relative to said frame whilst constrained to remain parallel with each other, each said pair of side members being coupled together below their upper ends by at least one transverse link whose opposite ends are pivotally connected to the respective side members and which is pinned intermediate its ends to said frame for pivotal movement about an axis, and a pair of parallel, elongate shaver heads mounted on the respective upper ends of said side members for movement relative to said shaver frame, each said pair of side members and its associated link being formed in a unitary plastics moulding, each link being integrally connected to the respective side members by flexible hinges.
Dependencies are inferred from the claim text.