Two-speed fastener driver

• US 5,730,232 A
• Filed: 04/10/1996
• Issued: 03/24/1998
• Est. Priority Date: 04/10/1996
• Status: Expired due to Fees

• Current Assignee: John E. Mixer
• Original Assignee: John E. Mixer
• Inventors: Mixer, John E.
• Primary Examiner(s): Smith, Scott A.
• Application Number:
  US08/631,307
• Time in Patent Office: 713 Days
• Field of Search: 173/176, 173/178, 173/216, 173/218
• US Class Current: 173/176
• CPC Class Codes: B25B 21/008 with automatic change-over from high speed-low torque mode to low speed-high torque mode
• CPC Class Codes: B25B 23/0078 Reaction arms
• CPC Class Codes: B25F 5/001 Gearings, speed selectors, clutches or the like specially adapted for rotary tools
• CPC Class Codes: B25F 5/025 with torque reaction bars for rotary tools
• CPC Class Codes: F16H 3/005 for gearings using gears having orbital motion

Abstract

A two-speed fastener driving tool includes a reversible rotary motor including means to reverse, having an output shaft connected in axial alignment with a tool driving output shaft by an improved drive assembly comprising a first overrunning clutch axially aligned with the motor output shaft for providing a high speed drive connection with the tool driving output shaft when the motor is rotated in a first direction. A second overrunning clutch surrounds the first overrunning clutch and functions for providing a low speed drive connection with the tool driving output shaft when the motor is rotated in a direction opposite to the first direction.

Claims

1. In a fastener driving tool including a reversible rotary motor including a reversal means upon demand and having an output shaft connected in axial alignment with a tool driving output shaft by improved drive means, said improved drive means comprising a first overrunning clutch means axially aligned with the motor output shaft for providing a high speed drive connection with the tool driving output shaft when the motor is rotated in a first direction, and a second overrunning clutch means surrounding said first overrunning clutch means for providing a low speed drive connection with the tool driving output shaft when the motor is rotated in a direction opposite to the first direction.

2. A fastener driving tool as set forth in claim 1 including a first planetary gear means drivingly connected between the output shaft of the rotary motor and the first overrunning clutch means.

3. A fastener driving tool as set forth in claim 2 including a second planetary gear means drivingly connected between the first overrunning clutch means and the tool driving output shaft.

4. A fastener driving tool as set forth in claim 3 wherein said first and second planetary gear means are continuously engaged whenever said motor is rotated.

5. A fastener driving tool as set forth in claim 3 wherein said second overrunning clutch means includes pivotally mounted latch means on a carrier member that drives said second planetary gear means.

6. A fastener driving tool as set forth in claim 5 wherein said carrier member constitutes a component of said first overrunning clutch means.

9. A fastener driving tool as set forth in claim 4 wherein said first and second planetary gear means are continuously engaged whenever said motor is rotated with said first planetary gear means producing continuous rotation of a first component of said second planetary gear means.

10. A fastener driving tool as set forth in claim 9 wherein said second overrunning clutch means includes a carrier member having pivotally mounted latch means that drive said second planetary gear means.

11. A fastener driving tool as set forth in claim 10 wherein said carrier member further constitutes a component of said first overrunning clutch means.

7. A fastener driving tool including a reversible rotary motor having an output shaft connected in axial alignment with a tool driving output shaft by drive means comprising a first rotary overrunning clutch means axially aligned with the motor output shaft for providing a high speed drive connection with the tool driving output shaft when the motor is rotated in a first direction, and a second rotary overrunning clutch means mounted in surrounding relationship to said first rotary overrunning clutch means for providing a low speed drive connection with the tool driving output shaft when the motor is rotated in a direction opposite to the first direction;

and,

a first planetary gear means drivingly connected between the output shaft of the rotary motor and the first rotary overrunning clutch means.

8. A fastener driving tool as set forth in claim 7 including a second planetary gear means drivingly connected between the first rotary overrunning clutch means and the tool driving output shaft.