Automatically adjusting braking device

Claim 2

An automatically adjusting braking device for a band brake, which comprises a brake drum secured to a vehicle body with a brake band in engaging contact therearound with one end secured to an anchor means and the other end secured to an adjusting component wherein the anchor means is connected between the end of an actuating means and said adjusting component through a feed mechanism for driving said adjusting component and wherein a return spring is connected between said anchor means and the vehicle body.

Claim 3

An automatically adjusting braking device as set forth in claim 1, wherein said actuating means is a piston rod projecting from and associated with a hydraulic cylinder-piston assembly.

Claim 4

An automatically adjusting braking device as set forth in claim 1, wherein said adjusting component comprises an adjusting bolt, one end thereof being connected to the feed mechanism and the other end coming into contact with the anchor means through a pin shaft provided at a foot portion of the anchor means, and an adjusting member, one end thereof being threadingly engaged with the adjusting bolt so that said adjusting member is moved along the longitudinal direction thereof when the adjusting bolt is rotated by the action of the feed mechanism drived by the operation of the return spring and the other end being secured to one end of the brake band.

Claim 5

An automatically adjusting braking device as set forth in claim 3, said feed mechanism comprises an one-way clutch engaged with the adjusting bolt and having two levers at each side thereof, one of which a roller is provided at the distal end thereof and the other of which a suspending means is provided so as to prevent the one-way clutch from being moved due to vibration of the vehicle body; a connecting member connected between the end of an actuating means and the anchor means; a plate member fixedly secured to one side-end portion of the connecting member; a leaf spring of a substantially U-shaped form provided at the inside of said plate member so that one engaging portion of the leaf spring comes into contact with the roller and the other engaging portion thereof is so provided as to space apart from the roller at such a distance as adding a slight addition to a stroke of the end of the actuating means corresponding to the gap provided between the outer peripheral surface of the brake drum and the inner peripheral surface of a lining of the brake band.

Claim 6

An automatically adjusting braking device as set forth in claim 4, wherein said suspending means is composed of a spring connected between said connecting member and said the other lever of the one-way clutch.

Claim 7

An automatically adjusting braking device as set forth in claim 4, wherein said suspending means is composed of a spring connected between the vehicle body and said the other lever of the one-way clutch.

Claim 8

An automatically adjusting braking device as set forth in claim 4, wherein said actuating means is a piston rod projecting from and associated with a hydraulic cylinder-piston assembly.