# US RE49,843 E1 · Reciprocating razor assembly with different amplitudes of motion > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US RE49,843 E1 - Document ID: USRE49843E1 - Status: Granted - Kind: E1 - Application number: 17/706,040 - Filed: 2022-03-28 - Granted: 2024-02-20 - Earliest claimed: 2019-12-02 - Applicants: Leon Coresh - Inventors: Leon Coresh - Web page: https://patentgrep.com/patent/USRE49843E1 ## CPC - B26B 21/4062: {Actuating members, e.g. switches or control knobs; Adjustments} - B26B 21/38: with provision for reciprocating the blade by means other than rollers (reciprocating the cutting elements of clippers or dry shavers B26B19/00) - B26B 21/4012: {Housing details, e.g. for cartridges} - B26B 21/227: {with blades being resiliently mounted in the changeable unit} - B26B 21/405: {Electric features; Charging; Computing devices} - B26B 21/4068: {Mounting devices; Manufacture of razors or cartridges (B26B21/528 takes precedence)} - B26B 21/521: {Connection details, e.g. connection to razor heads} - B26B 21/526: {Electric features} - B26B: HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR (for harvesting A01D; for horticulture, for forestry A01G; for butchering or meat treatment A22; for manufactering or repairing footwear A43D; nail clippers or cutters A45D29/02; kitchen equipment A47J; {vegetable slicers, julienne cutters and similar devices and holders therefor, B26D3/28}; for surgical purposes A61B; for metal B23D; cutting by abrasive fluid jets B24C5/02; plier-like tools with cutting edges B25B7/22; pincers B25C11/02; handles for hand implements, in general B25G; guillotine-type cutters B26D; {perforating by non-mechanical means, e.g. by fluid jet, B26F1/26}; for erasing B43L19/00; for textile materials D06H) ## Abstract A shaving razor having at least two independent blade assemblies coupled to substantially rigid linkages. The linkages each defining a pivot point between the two independent blade assemblies. A bridge spans between the linkages such that movement of the bridge causes pivoting about the pivot point enabling reciprocating motion of the blade assemblies where assemblies on opposite sides of the pivot point reciprocate in opposite directions. ## Claims ### Claim 1 A shaving razor comprising: at least two blade assemblies including a first independent blade assembly and a second independent blade assembly, each blade assembly having at least one blade; a first and second substantially rigid linkages coupling together the first and second independent blade assemblies, the linkages each defining a pivot point between the first and the second independent blade assemblies; a bridge spanning between and coupled the first and second linkages, wherein movement of the bridge causes the linkages to pivot about the pivot points such that the first and second blade assemblies move in opposite lateral directions responsive to a force applied by an actuator. ### Claim 2 (depends on 1) The shaving razor of claim 1 wherein an amplitude of lateral movement is greater for the second blade assembly than the first blade assembly. ### Claim 3 (depends on 1) The shaving razor of claim 1 wherein the first blade assembly is coupled to the linkages more proximate to the pivot points than the second blade assembly. ### Claim 4 (depends on 1) The shaving razor of claim 1 further comprising: a handle; and the actuator residing within the handle to engage the bridge to cause motion of the bridge. ### Claim 5 (depends on 4) The shaving razor of claim 4 where in the actuator comprises: an armature; and an armature housing. ### Claim 6 (depends on 1) The shaving razor of claim 1 further comprising: a third independent blade assembly. ### Claim 7 (depends on 6) The shaving razor of claim 6 wherein a relative motion of the first blade assembly to the third blade assembly is in a range from 0.1 mm to less than 0.5 mm and a relative motion of the second blade assembly to the third blade assembly is in a range of 0.05 mm to less than 0.25 mm. ### Claim 8 (depends on 6) The shaving razor of claim 6 wherein a relative motion between the first blade assembly and the third blade assembly is less than 0.5 mm and the relative motion between the second blade assembly and the first blade assembly is no more than half the relative motion between the first and third blade assemblies. ### Claim 9 (depends on 1) The shaving razor of claim 1 wherein each linkage defines a plurality of bores, each bore to receive a post of one of the at least two, blade assemblies and wherein the post remains rotatable within the bore after assembly. ### Claim 10 (depends on 1) The shaving razor of claim 1 further comprising: a pair of stops and wherein each linkage engages one of the pair of stops at the pivot point during use. ### Claim 11 (depends on 1) The shaving razor of claim 1 wherein each linkage defines a stop retention feature at the pivot point. ### Claim 12 (depends on 1) The shaving razor of claim 1 wherein an amplitude of the movement in a first lateral direction is substantially equal to an amplitude of the movement in a second lateral direction for each blade assembly. ### Claim 13 (depends on 1) The shaving razor of claim 1 wherein the relative motion between any two immediately adjacent blade assemblies is less than 0.5 mm. ### Claim 14 A shaving razor comprising: a first blade assembly having a first razor blade with a first cutting edge, the first blade assembly displaceable along a first path substantially parallel to the first cutting edge: a second blade assembly having a second razor blade with a second cutting edge, the second blade assembly deployed to cut in a same direction as the first blade assembly and to be displaceable along a second path substantially parallel to the second cutting edge: a first linkage coupling together a first end of the first blade assembly with a first end of the second blade assembly: and a second linkage coupling together a second end of the first blade assembly with a second end of the second blade assembly: wherein the first and second linkages are configured such that a first displacement of the first blade assembly along the first path causes a second displacement of the second blade assembly along the second path, the second displacement being in the same direction as, but with a different amplitude from, the first displacement. ### Claim 15 (depends on 14) The shaving razor of claim 14 further comprising: a first pivot element associated with the first linkage; and a second pivot element associated with the second linkage, wherein the first and second pivot elements defining pivot points for the first and second linkages, respectively. ### Claim 16 (depends on 14) The shaving razor of claim 14 further comprising: a third blade assembly having a third razor blade with a third cutting edge, the third blade assembly deployed for cutting in the same direction as the first and second blade assemblies and being displaceable along a third path substantially parallel to the third cutting edge: and wherein a first end of the third blade assembly is coupled to the first linkage and a second end of the third blade assembly is coupled to the second linkage: and wherein the first and second linkages are configured such that the displacement of the first blade assembly along the first path causes a displacement of the third blade assembly along the third path in a direction opposite to the displacement of the first blade assembly. ### Claim 17 (depends on 14) The shaving razor of claim 14 further comprising: a handle: and an actuator coupled to the handle to displace the first blade assembly. ### Claim 18 (depends on 17) The shaving razor of claim 17 wherein the actuator comprises a voice coil. ### Claim 19 (depends on 17) The shaving razor of claim 17 wherein an amplitude of relative motion generated by the actuator between the first blade assembly and the second blade assembly is in the range from 0.05 mm to 0.25 mm. ### Claim 20 (depends on 1) The shaving razor of claim 1 wherein the first and second blade assemblies reside aligned in a rest position when no force is applied and are, in use, displaced less than 0.25 mm in one direction from the rest position.