Patent ID: 7395733
Filing Date: 2008-07-08
Classification: B60N,Y10T

Abstract:
1. A traction cable brake for an ergonomic device adapted for maintaining a position against a load, the load presenting to the brake as traction on a traction cable; said traction cable brake comprising: a gear having a channel, which is located centrally with respect to a top and bottom surface of said gear, wherein said channel functions as a mount for seating a traction cable wire, said wire, when under a load, biasing said gear in a first rotational direction; said gear having a notch for receiving installation of an end stop of the traction cable wire; a housing, said gear being mounted in said housing; a drive shaft adapted to receive rotational force from a handle; said drive shaft being operatively engaged with said gear, said operative engagement transferring a force on said drive shaft to turn said gear in said first rotational direction or in a second rotational direction; a spring, said spring having a first extension and second extension; a guide surface, said guide surface being dimensioned to receive said spring on an outer surface thereof; an inner surface on said housing; wherein said drive shaft has a circumferential shoulder having a first face and a second face, the first and second faces being radially disposed; a third and fourth face, said third and fourth face being in operative engagement with said gear; wherein said first, second, third and fourth faces are situated with respect to said first and second extensions such that when a moment is not applied to said drive shaft said first, second, third and fourth faces are moved such that said spring is moved to a first diameter, and such that, when said moment is applied to said drive shaft, said first, second, third and fourth faces are moved such that said spring is moved to a second diameter; wherein said spring frictionally engages with said inner surface when said spring is moved to said first diameter, and wherein said spring disengages with said inner surface when said spring is moved to said second diameter; wherein said gear is prevented from rotating when said spring is engaged with said inner surface; and wherein, said wire is used to actuate an ergonomic device.