US 12,420,387 B2
Continuous rotation torque wrench
Abraham Barzelay, Paramus, NJ (US)
Assigned to TECH PATENTS LLC, Paramus, NJ (US)
Filed by TECH PATENTS LLC, Paramus, NJ (US)
Filed on Mar. 24, 2017, as Appl. No. 15/469,160.
Prior Publication US 2018/0272512 A1, Sep. 27, 2018
Int. Cl. B25B 23/00 (2006.01); B25B 17/02 (2006.01); B25B 21/02 (2006.01); B25F 3/00 (2006.01); B25F 5/00 (2006.01); B25F 5/02 (2006.01)
CPC B25B 23/0007 (2013.01) [B25B 17/02 (2013.01); B25B 21/02 (2013.01); B25F 3/00 (2013.01); B25F 5/001 (2013.01); B25F 5/02 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A torque wrench, comprising:
an input end configured to receive a torsional input;
a sealed housing containing pressurized lubricant;
a gear train disposed inside the housing and operatively driven by the torsional input;
an engagement unit configured to selectively create a mechanical coupling between the input end and a lever or motor; and
an output end operatively driven by the gear train to produce a torsional output,
wherein the gear train is sealed inside the housing from a surrounding environment at a positive pressure relative to the surrounding environment when the lubricant is inserted, wherein a unidirectional valve is connected to the housing and configured to pass the pressurized lubrication unidirectionally into the housing, and wherein the housing is sufficiently sealed and the positive pressure is sufficiently high to prevent water from passing through the unidirectional valve when the torque wrench is used underwater.