# US 11,077,543 B2 · Apparatus for tightening threaded fasteners > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,077,543 B2 - Document ID: US11077543B2 - Status: Granted - Kind: B2 - Application number: 16/324,792 - Filed: 2017-08-08 - Published: 2019-07-25 - Granted: 2021-08-03 - Earliest claimed: 2016-08-08 - Assignees: HYTORC Division UNEX Corporation - Applicants: HYTORC Division UNEX Corporation - Inventors: Peter E. Fortoloczki - Web page: https://patentgrep.com/patent/US11077543B2 ## CPC - B25F 5/001: {Gearings, speed selectors, clutches or the like specially adapted for rotary tools} - B25B 21/00: Portable power-driven screw or nut setting or loosening tools; (details or components, e.g. casings, bodies, of portable power-driven tools not particularly related to the operation performed B25F5/00; {for mounting or dismounting wheels B60B29/006}); Attachments for drilling apparatus serving the same purpose (machines B23P19/06) - B25B 21/008: {with automatic change-over from high speed-low torque mode to low speed-high torque mode} - B25B 23/0078: {Reaction arms} - Y02E 60/10: Energy storage using batteries - B25F: COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR {(machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass B23P23/00 and subgroups)} - B25B: TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING, OR HOLDING - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract The present invention seeks to protect Applicant's HYTORC® LITHIUM SERIES™ Torque Gun Tools for tightening and/or loosening of industrial threaded fasteners. Such tools include: a drive input and output assembly; a turning force multiplication assembly; a dual drive output and reaction assembly; and a yoke-style shifting assembly for any torque mode from lower and/or higher resistance and/or speed. A preferred embodiment includes an electric motor of the drive input and output assembly powered by a battery pack. Advantageously, the yoke-style shifting assembly: improves and simplifies design and operation of shifting; reduces tool size and cost; and increases tool portability, efficiency, reliability and repeatability, all without sacrificing Applicant's many innovations in hand-held, multispeed torque intensifying tools. ## Claims ### Claim 1 A torque power tool for tightening and/or loosening of an industrial threaded fastener including: a motor to generate a turning force; a drive to transfer the turning force; a turning force multiplication mechanism assembly having one or more gear stages; a yoke-style shifter assembly to shift the tool between a higher speed/lower torque (HSLT) mode and a lower speed/higher torque (LSHT) mode; wherein in during the HSLT mode, a shifter ring gear of the yoke-style shifter assembly engages an external carrier locking gear of a first gear stage; and during the LSHT mode, the shifter ring gear engages an external mating stationary gear that is grounded to a drive tool housing via a stationary ring gear adaptor. ### Claim 2 (depends on 1) A torque power tool according to claim 1 electronically driven and powered by a battery pack. ### Claim 3 (depends on 2) A torque power tool according to claim 2 wherein the yoke-style shifter assembly includes a shifter rod formed between the mode selector switch and the shifter yoke. ### Claim 4 (depends on 3) A torque power tool according to claim 3 wherein the yoke style shifter assembly includes: a shifter clevis pin formed between the shifter rod and the shifter yoke; and a shifter yoke pin formed between the shifter yoke and the shifter ring gear. ### Claim 5 (depends on 1) A torque power tool according to claim 1 either electronically, hydraulically, pneumatically or manually driven. ### Claim 6 (depends on 1) A torque power tool according to claim 1 wherein the yoke-style shifter assembly includes: a mode shifter switch; and a shifter yoke. ### Claim 7 (depends on 1) A torque power tool according to claim 1 wherein the yoke-style shifter assembly is movable between a first position which places the tool in the HSLT mode and a second position which places the tool in the LSHT mode. ### Claim 8 (depends on 1) A torque power tool according to claim 1 wherein the yoke-style shifting assembly transforms linear displacement of a shifter rod by a mode shifter switch to rotatably slideable displacement of a shifter yoke to linear displacement of the shifter ring gear. ### Claim 9 (depends on 1) A torque power tool according to claim 1, wherein the shifter ring gear and the external carrier locking gear have the same pitch and number of teeth, and wherein the shifter ring gear and the external mating stationary gear have the same pitch and number of teeth. ### Claim 10 (depends on 1) A torque power tool according to claim 1 wherein the shifter ring gear of the yoke-style shifter assembly always engages with planetary gears of the first gear stage, regardless of torque mode. ### Claim 11 (depends on 1) A torque power tool according to claim 1 wherein the stationary gear is engaged by the shifter ring gear during the LSHT mode when the first gear stage operates normally. ### Claim 12 (depends on 1) A torque power tool according to claim 1 wherein the external carrier gear is engaged by the shifter ring gear and locks out the first gear stage during a HSLT mode. ### Claim 13 (depends on 1) A torque power tool according to claim 1 wherein the shifter ring gear is positioned substantially half on planetary gears of the first gear stage and substantially half on the stationary gear in the HSLT mode. ### Claim 14 (depends on 1) A torque power tool according to claim 1 wherein the shifter ring gear is positioned substantially half on planetary gears of the first gear stage and substantially half on the external carrier gear in the HSLT mode. ### Claim 15 (depends on 1) A torque power tool according to claim 1 wherein the first gear stage is independently mounted on it's own bearings. ### Claim 16 (depends on 1) A torque power tool according to claim 1 wherein a turning force in one direction leaves the first gear stage at a lower rate of rotation and a higher torque intensity than when it entered and is transferred to a second gear stage in the LSHT mode. ### Claim 17 (depends on 1) A torque power tool according to claim 1 wherein a turning force in one direction leaves the first gear stage at a substantially similar rate of rotation and a substantially similar torque intensity than when it entered and is transferred to a second gear stage in the HSLT mode. ### Claim 18 (depends on 1) A torque power tool according to claim 1 including three or more torque modes from lower and/or higher resistance and/or speed. ### Claim 19 (depends on 1) A system for fastening objects including: a threaded fastener; and a torque power tool of claim 1.