# US 9,751,228 B2 · Shaving cartridges having thermal sensors > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,751,228 B2 - Document ID: US9751228B2 - Status: Granted - Kind: B2 - Application number: 14/552,554 - Filed: 2014-11-25 - Published: 2015-07-16 - Granted: 2017-09-05 - Earliest claimed: 2014-01-14 - Assignees: The Gillette Company - Applicants: The Gillette Company - Inventors: Klaus Heubach; Norbert Broemse; Timo Schmitt; Maurice Schirmer; Felix Koenig - Web page: https://patentgrep.com/patent/US9751228B2 ## CPC - B26B 21/4056: {Sensors or controlling means} - B26B 21/4062: {Actuating members, e.g. switches or control knobs; Adjustments} - B26B 21/4081: {Shaving methods; Usage or wear indication; Testing methods} - B26B 21/48: Heating means - 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 system with a heating element for transferring heat during a shaving stroke. The heating element has a skin contacting surface. An insulating member for delivering heat to the heating element has a plurality of spaced apart thermal sensors are mounted to the insulating member and positioned below the skin contacting surface. An electrical circuit is configured to deliver energy to the insulating member. The electrical circuit has a control circuit for temperature regulation. A power source is in communication with the electrical circuit. The thermal sensors measure the temperature of the heating element and are in communication with the control circuit. ## Claims ### Claim 1 A shaving razor system comprising: a housing comprising a guard, a cap, and one or more blades located between the guard and the cap, said guard being positioned in front of said one or more blades, said cap being positioned behind said one or more blades, a heating element in front of the one or more blades for transferring heat during a shaving stroke, said heating element comprising a skin contacting surface; an insulating member for delivering heat to the heating element; an electrical circuit configured to deliver energy to the insulating member, the electrical circuit comprising a control circuit for temperature regulation; a power source in communication with the electrical circuit; a plurality of spaced apart thermal sensors directly mounted to the insulating member and positioned below the skin contacting surface, wherein the thermal sensors independently output a temperature of the heating element and are in communication with the control circuit. ### Claim 2 (depends on 1) The shaving razor system of claim 1 wherein the control circuit decreases power to the insulating member if an average temperature of the thermal sensors is greater than or equal to a predetermined temperature value. ### Claim 3 (depends on 2) The shaving razor system of claim 2 wherein the temperature control circuit comprises a microcontroller that stores the predetermined temperature value and sends a signal to an electrical switch to open and close. ### Claim 4 (depends on 2) The shaving razor system of claim 2 wherein the temperature control circuit shuts off power to the insulating member if the temperature output of either thermal sensor is greater than or equal to the predetermined temperature. ### Claim 5 (depends on 4) The shaving razor system of claim 4 wherein the predetermined temperature is greater than 50 C. ### Claim 6 A shaving razor system comprising: a heating element for transferring heat during a shaving stroke, said heating element comprising a skin contacting surface; an insulating member for delivering heat to the heating element; an electrical circuit configured to deliver energy to the insulating member, the electrical circuit comprising a control circuit for temperature regulation; a power source in communication with the electrical circuit; a plurality of spaced apart thermal sensors directly mounted to the insulating member and positioned below the skin contacting surface, wherein the thermal sensors measure the temperature of the heating element and are in communication with the control circuit; the control circuit decreases power to the insulating member if an average temperature sensed by the thermal sensors is greater than or equal to a first predetermined temperature; and the control circuit decreases power to the insulating member if an individual temperature sensed by either of the thermal sensors is greater than or equal to a second predetermined temperature that is greater than the first predetermined temperature. ### Claim 7 (depends on 6) The shaving razor system of claim 6 wherein the control circuit shuts off power to the insulating member if the average temperature sensed by the thermal sensors is greater than or equal to the first predetermined temperature. ### Claim 8 (depends on 6) The shaving razor system of claim 6 wherein the control circuit shuts off power to the insulating member if the individual temperature sensed by either of the thermal sensors is greater than or equal to the second predetermined temperature. ### Claim 9 (depends on 6) The shaving razor system of claim 6 wherein the first predetermined temperature is about 46° C. to about 50° C. ### Claim 10 (depends on 6) The shaving razor system of claim 6 wherein the second predetermined temperature is about 50° C. to about 60° C. ### Claim 11 (depends on 6) The shaving razor system of claim 6 wherein the first predetermined temperature is greater than the second predetermined temperature by at least about 2° C. ### Claim 12 (depends on 6) The shaving razor system of claim 6 further comprising a housing having a guard, a cap, and at least one blade between the guard and the cap, said guard being positioned in front of the at least one blade and the cap being positioned behind the at least one blade, wherein the heating element is mounted to the housing and the skin contacting surface is positioned in front of the at least one blade. ### Claim 13 (depends on 6) The shaving razor shaving razor system of claim 6 further comprising an electrical switch operatively connected to the insulating member and the power source, the electrical switch having an open position for stopping power from flowing from the power source to the insulating member and a closed position for facilitating power to flow from the power source to the insulating member. ### Claim 14 (depends on 6) The shaving razor system of claim 6 wherein the thermal sensors are spaced apart by about 3 mm to about 30 mm.