Brake with axially expanding brake shoes
AssigneeSociete Anonyme Francaise du Ferodo
InventorLeonce E. R. Rogier
Life of this patent
Estimating the term…
Abstract
A brake having axially-expanding brake shoes, comprises an actuating block radially located in a peripheral annular groove formed in a rotating member. The actuating block possesses along its axis, a plurality of cylinders in which slide pistons which apply the brake shoes against the braking surfaces formed by the opposite radially-extending faces of the groove. According to the invention, the actuating block comprises a single, solid, center support plate, and the ends of the cylinders project axially over the transverse faces of this support plate.
Claims16
A brake with axially expanding brake shoes comprising a rotatable member, a peripheral annular groove in said rotatable member, opposite radially extending faces of said rotatable member forming two braking surfaces, at least one actuating block radially engaged in said groove and connected to support means, said actuating block including for each of said braking surfaces, at least one actuating unit comprising a cylinder having at least one open end opening onto its associated braking surface, and a piston mounted for movement at said open end of each of said cylinders, each of said cylinders defining with its associated piston a fluid chamber which is in communication with a feed nozzle connectable to a pressurized fluid source, said actuating block being joined to said support means by a swivel joint having an internal and an external cage, said actuating block forming a yoke joined to one of said cages of said swivel joint, the other of said cages being joined to said support means and said yoke forming means cooperable with said support means for restricting movement of said actuating block.
A brake having axially expanding brake shoes comprising a rotatable member, an annular peripheral groove in said rotatable member, opposite radially extending faces of said rotatable member forming two braking surfaces, at least one actuating block radially engaged in said groove and connected to support means, said actuating block having at least one actuating unit comprising a cylinder open at both ends onto respective braking surfaces, a piston mounted for movement at each of said open ends of said cylinder in opposite directions for cooperation with the respective braking surfaces, said cylinder defining with said pistons a fluid chamber in communication with a feed nozzle adapted to be connected to a source of pressurized fluid, said actuating block comprising a single, solid, center support plate, end portions of said cylinder forming part of said actuating block for the corresponding braking surfaces axially projecting beyond each radially extending face of said support plate, said cylinder being a tubular component separate from said support plate, said tubular component being in force-fitted in a complementary aperture in said support plate, said cylinder having three successive external bearing surfaces including a first or front bearing surface having a diameter substantially smaller than that of said aperture in said support plate, a second or center bearing surface having a diameter slightly smaller than that of said aperture and an unmachined, third or rear bearing surface.
Dependencies are inferred from the claim text.