# US 11,110,577 B2 · Pneumatic fastener driver > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,110,577 B2 - Document ID: US11110577B2 - Status: Granted - Kind: B2 - Application number: 16/193,277 - Filed: 2018-11-16 - Published: 2019-05-16 - Granted: 2021-09-07 - Earliest claimed: 2017-11-16 - Assignees: Milwaukee Electric Tool Corporation - Applicants: Milwaukee Electric Tool Corporation - Inventors: Andrew J. Weber; James M. Wentzloff; Nicholas A. Albers; Bradley S. Helm; Troy C. Thorson - Web page: https://patentgrep.com/patent/US11110577B2 ## CPC - B25C 1/047: {Mechanical details} - B25C 1/005: {for rows of contiguous nails} - B25C 1/042: {Main valve and main cylinder} - B25C 1/06: operated by electric power - B25C: HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS (for shoemaking A43D) ## Abstract A fastener driver includes a housing having a handle portion. A motor is positioned within the housing. The fastener driver further includes an air compressor including a compressor cylinder and a compressor piston movable within the compressor cylinder in a reciprocating manner to compress air within the compressor cylinder. The fastener driver further includes a drive train converting torque from the motor to a linear force applied to the compressor piston, causing the compressor piston to move in the reciprocating manner. At least a portion of the drive train extends through the handle portion of the housing. ## Claims ### Claim 1 A fastener driver comprising: a housing including a handle portion; a motor positioned within the housing; an air compressor including a compressor cylinder and a compressor piston movable within the compressor cylinder in a reciprocating manner to compress air within the compressor cylinder; and a drive train converting torque from the motor to a linear force applied to the compressor piston, causing the compressor piston to move in the reciprocating manner, wherein at least a portion of the drive train extends through the handle portion of the housing, wherein the drive train includes a speed reduction mechanism that receives the torque from the motor, wherein the speed reduction mechanism is a first speed reduction mechanism, and wherein the drive train includes a second speed reduction mechanism separate from the first speed reduction mechanism such that the first speed reduction mechanism and the second speed reduction mechanism is configured as a split gearbox. ### Claim 2 (depends on 1) The fastener driver of claim 1, wherein the drive train includes a drive shaft that extends at least partially through the handle portion. ### Claim 3 (depends on 2) The fastener driver of claim 2, wherein the drive train includes a speed reduction mechanism upstream of the drive shaft. ### Claim 4 (depends on 1) The fastener driver of claim 1, wherein the handle portion includes a first end and a second end, and wherein the drive train includes a first speed reduction mechanism positioned proximate the first end. ### Claim 5 (depends on 1) The fastener driver of claim 1, wherein the drive train includes a crank arm assembly operatively coupled to the compressor piston. ### Claim 6 (depends on 1) The fastener driver of claim 1, further comprising a battery pack, wherein the battery pack provides power to the motor. ### Claim 7 A fastener driver comprising: a housing including a handle portion; a motor positioned within the housing; an air compressor including a compressor cylinder and a compressor piston movable within the compressor cylinder in a reciprocating manner to compress air within the compressor cylinder; and a drive train converting torque from the motor to a linear force applied to the compressor piston, causing the compressor piston to move in the reciprocating manner, wherein at least a portion of the drive train extends through the handle portion of the housing, wherein the drive train includes a drive shaft that extends at least partially through the handle portion, and wherein the drive train includes a speed reduction mechanism downstream of the drive shaft. ### Claim 8 (depends on 7) The fastener driver of claim 7, wherein the speed reduction mechanism is a gear train including a first gear, a second gear meshed with the first gear, and a third gear meshed with the second gear. ### Claim 9 A fastener driver comprising: a housing including a handle portion; a motor positioned within the housing; an air compressor including a compressor cylinder and a compressor piston movable within the compressor cylinder in a reciprocating manner to compress air within the compressor cylinder; and a drive train converting torque from the motor to a linear force applied to the compressor piston, causing the compressor piston to move in the reciprocating manner, wherein at least a portion of the drive train extends through the handle portion of the housing, wherein the handle portion includes a first end and a second end, and wherein the drive train includes a first speed reduction mechanism positioned proximate the first end, and wherein the drive train includes a second speed reduction mechanism positioned proximate the second end. ### Claim 10 (depends on 9) The fastener driver of claim 9, wherein the housing includes a head portion adjacent the handle portion, the head portion supporting the air compressor, and wherein the second speed reduction mechanism is at least partially within the head portion. ### Claim 11 A fastener driver comprising: a housing including a head portion, a battery attachment portion, and a handle portion extending therebetween; a motor positioned within the battery attachment portion; a battery pack coupled to the battery attachment portion for providing power to the motor; an air compressor including a compressor cylinder and a compressor piston movable within the compressor cylinder in a reciprocating manner to compress air within the compressor cylinder; and a drive train converting torque from the motor to a linear force applied to the compressor piston, causing the compressor piston to move in the reciprocating manner, wherein the drive train includes a drive shaft extending through the handle portion, and wherein the drive train includes a speed reduction mechanism downstream of the drive shaft. ### Claim 12 (depends on 11) The fastener driver of claim 11, wherein the drive train includes a speed reduction mechanism upstream of the drive shaft. ### Claim 13 (depends on 11) The fastener driver of claim 11, wherein the handle portion includes a first end and a second end opposite the first end, and wherein a speed reduction mechanism is positioned proximate the first end. ### Claim 14 (depends on 13) The pneumatic fastener driver of claim 13, wherein the drive shaft extends at least between the first and second ends. ### Claim 15 A fastener driver comprising: a housing including a head portion, a battery attachment portion, and a handle portion extending therebetween; a motor positioned within the battery attachment portion; a battery pack coupled to the battery attachment portion for providing power to the motor; an air compressor including a compressor cylinder and a compressor piston movable within the compressor cylinder in a reciprocating manner to compress air within the compressor cylinder; and a drive train converting torque from the motor to a linear force applied to the compressor piston, causing the compressor piston to move in the reciprocating manner, wherein the drive train includes a drive shaft extending through the handle portion, wherein the handle portion includes a first end and a second end opposite the first end, and wherein a speed reduction mechanism is positioned proximate the first end, and wherein the drive train includes a second speed reduction mechanism positioned proximate the second end. ### Claim 16 A fastener driver comprising: a housing including a head portion, a battery attachment portion, and a handle portion extending therebetween; a motor positioned within the battery attachment portion; a battery pack coupled to the battery attachment portion for providing power to the motor; an air compressor including a compressor cylinder and a compressor piston movable within the compressor cylinder in a reciprocating manner to compress air within the compressor cylinder; and a drive train converting torque from the motor to a linear force applied to the compressor piston, causing the compressor piston to move in the reciprocating manner, wherein the drive train includes a drive shaft extending through the handle portion, and wherein the drive train includes a speed reduction mechanism positioned within the head portion. ### Claim 17 (depends on 16) The fastener driver of claim 16, wherein the drive train includes a crank arm assembly positioned within the head portion, the crank arm assembly connected between the compressor piston and the speed reduction mechanism.