# US 2015/0101465 A1 · Cam assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2015/0101465 A1 - Document ID: US20150101465A1 - Status: Published application - Kind: A1 - Application number: 14/574,252 - Filed: 2014-12-17 - Published: 2015-04-16 - Earliest claimed: 2012-05-21 - Inventors: Brian James Cutler - Web page: https://patentgrep.com/patent/US20150101465A1 ## CPC - B25B 23/1427: {by mechanical means} - B25B 15/02: operated by rotating the handle - F16D 7/024: {with axially applied torque limiting friction surfaces} - F16H 25/186: {with reciprocation along the axis of oscillation} - Y10T 29/49826: Assembling or joining - Y10T 29/49906: Metal deforming with nonmetallic bonding - Y10T 74/2101: Cams - Y10T 156/10: Methods of surface bonding and/or assembly therefor - B25B: TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING - F16D: COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES - F16H: GEARING - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A torque-limiting driving tool having a body having an axis of rotation, an elongated shaft disposed along the axis of rotation and supported by the body, and a torque-limiting element disposed to limit the amount of torque imposed on the body which is transmitted to the elongated shaft. The torque-limiting element includes opposed cams each of which comprises a metallic cam surface and a non-metallic structural base which is disposed to hold the metallic cam surface in operable position within the body. The torque-limiting driver may have a torque-adjustment element which is operable to adjust the torque value to which the transmitted torque is limited, which may include a plug bearing threads which are compatible with threads of the body. The body may include a locking element which drivably interacts with the plug to resist spontaneous rotation of the plug. ## Claims ### Claim 1 A torque-limiting driver, comprising: a body having an axis of rotation; an elongated shaft disposed along the axis of rotation and supported by the body, wherein the elongated shaft is shaped in transverse cross section to provide a keying effect for drivably engaging an object to be driven; and a torque-limiting element disposed to limit the amount of torque imposed on the body which is transmitted to the elongated shaft, comprising opposed cams each of which comprises a metallic cam surface and a non-metallic structural base which is disposed to hold the metallic cam surface in operable position within the body of the torque-limiting driver. ### Claim 2 (depends on 1) The torque-limiting driver of claim 1, further comprising a torque-adjustment element which is operable to adjust the torque value to which the transmitted torque is limited. ### Claim 3 (depends on 2) The torque-limiting driver of claim 2, wherein the torque-adjustment element comprises a plug bearing threads, and wherein the body of the torque-limiting driver comprises threads which are matingly compatible with the threads of the plug. ### Claim 4 (depends on 3) The torque-limiting driver of claim 3, wherein the body comprises a locking element which drivably interacts with the plug to resist rotation of the plug, whereby adjustment of the torque-adjustment element is constrained against going out of adjustment spontaneously. ### Claim 5 A metallic and non-metallic device comprising: a metallic weight or force bearing surface; and a non-metallic structural base material wherein said metallic weight or force bearing surface is fixably attached to said non-metallic structural base material to at least one surface. ### Claim 6 (depends on 5) A metallic and non-metallic device of claim 5, wherein said device is a cam assembly comprising a metallic cam surface and a non-metallic structural base. ### Claim 7 (depends on 5) The metallic and non-metallic device of claim 5, wherein the non-metallic base is made from a moldable material selected from the group consisting of plastic and resin. ### Claim 8 (depends on 5) The metallic and non-metallic device of claim 5, wherein the metallic weight or force bearing surface and non-metallic structural base is fixably attached by one from the group consisting of glue, weld, and interlock. ### Claim 9 (depends on 5) The metallic and non-metallic device of claim 5, made by the process of bonding the non-metallic structural base to the metallic cam surface. ### Claim 10 A method of generating a metallic weight or force bearing surface on a non-metallic structural base comprising the steps of: stamping out said metallic weight or force bearing surface on a sheet of metal; and fixing said metallic weight or force bearing surface to said non-metallic structural base. ### Claim 11 (depends on 10) A method of claim 10, wherein a step of fixing said metallic weight or force bearing surface into a mold wherein said non-metallic structural base is injected to make a single solid component. ### Claim 12 (depends on 10) The method of claim 10, wherein the non-metallic base is made from a moldable material selected from the group consisting of plastic and resin. ### Claim 13 (depends on 10) The method of claim 10, wherein the metallic weight or force bearing surface is fixably attached to a non-metallic structural base. ### Claim 14 (depends on 10) The method of claim 10, wherein the metallic weight or force bearing surface and non-metallic structural base are fixably attached by one from the group consisting of glue, weld, and interlock.