Safety razor with pivot point shift from center to guard-bar under applied load
First Claim
Patent Images
1. A shaving system comprising;
- a blade assembly;
a pivot assembly supporting said blade assembly for pivotal movement between first and second positions; and
a pivot frame supporting said pivot assembly for pivotal movement about a virtual pivot axis substantially coincident with one part of said blade assembly when said blade assembly is in said first position and substantially coincident with another part of said blade assembly when said blade assembly is in said second position, said blade assembly and said pivot assembly being pivotally movable about said virtual pivot axis in response to shaving force applied to said blade assembly.
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Accused Products
Abstract
A safety razor which features a pivot point that shifts from a center point pivot substantially on the shave plane, to a guard-bar pivot substantially on the shave plane, as shaving forces increase to help prevent nicks and cuts, and provide a smooth shave.
135 Citations
20 Claims
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1. A shaving system comprising;
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a blade assembly; a pivot assembly supporting said blade assembly for pivotal movement between first and second positions; and a pivot frame supporting said pivot assembly for pivotal movement about a virtual pivot axis substantially coincident with one part of said blade assembly when said blade assembly is in said first position and substantially coincident with another part of said blade assembly when said blade assembly is in said second position, said blade assembly and said pivot assembly being pivotally movable about said virtual pivot axis in response to shaving force applied to said blade assembly. - View Dependent Claims (2, 3, 4)
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5. A shaving system, comprising:
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a) a pivot frame; b) a pivot assembly coupled to said pivot frame for pivotal movement relative to said pivot frame about a system axis spaced from said pivot frame and said pivot assembly; c) a blade assembly coupled to said pivot assembly for pivotal movement between first and second positions relative to said pivot assembly, said system axis being generally coaxially aligned with one part of said blade assembly when said blade assembly is in its first position and generally coaxially aligned with another part of said blade assembly when said blade assembly is in said second position; d) first biasing means acting between said blade assembly and said pivot assembly for urging said blade assembly toward and to said first position; and e) second biasing means acting between said pivot assembly and said pivot frame for resisting pivotal movement of said pivot assembly and said blade assembly in at least one direction of rotation about said system axis. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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14. A triple blade shaving system, comprising:
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a) a pivot frame; b) a pivot assembly coupled to said pivot frame; c) a blade assembly coupled to said pivot assembly; d) first biasing means between said blade assembly and said pivot assembly; and e) second biasing means between said pivot assembly and said pivot frame, wherein said blade assembly includes a guard-bar, three blades, defines a shave plane and pivots relative to said pivot assembly between a first position and a second position; and
(1) when in said first position pivotal movement of said pivot assembly relative to said pivot frame in response to shaving force applied to said blade assembly causes pivotal movement of said blade assembly about a center axis of said blades, substantially on said shave plane; and
(2) when in said second position, pivotal movement of said pivot assembly relative to said pivot frame in response to shaving force applied to said blade assembly causes pivotal movement of said blade assembly substantially on said shave plane and about a guard-bar axis of said blade assembly.
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15. A shaving system comprising
a pivot assembly; -
a pivot frame supporting said pivot assembly for limited pivotal movement about a virtual axis spaced from said pivot frame and said pivot assembly; a blade assembly having a guard-bar, a blade group including a plurality of blades, and defining a shave plane, said blade assembly being supported on said pivot assembly for pivotal movement between first and second positions relative to said pivot assembly, said blade assembly having one part thereof coaxially aligned with said virtual axis when said blade assembly is in said first position and another part thereof coaxially aligned with said virtual axis when said blade assembly is in said second position. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification