Patent ID: 9217286
Filing Date: 2015-12-22
Classification: E21B

Abstract:
1. A power generator, comprising: a housing having a longitudinal axis; a rotor disposed within the housing to rotate about the longitudinal axis in a first direction with respect to the housing in response to a flow of fluid to the power generator; an output shaft at least partially disposed within the housing and operatively coupled to the rotor; and an anti-reverse bearing arranged radially between the output shaft and the housing to support the output shaft within the housing and allow rotation of the output shaft in the first direction but resist rotation of the output shaft in a second direction opposite the first direction about the longitudinal axis with respect to the housing, wherein the anti-reverse bearing includes: an outer race fixedly attached to the housing; a bearing cage disposed within the outer race and engageable with the output shaft to resist rotation in the second direction; and a plurality of rollers that interpose the outer race and the output shaft and force the bearing cage into engagement with the output shaft when the output shaft is moved in the second direction.