PNEUMATIC CONSTRICTING DRUM BRAKE ASSEMBLY
First Claim
Patent Images
1. A pneumatic constricting drum brake comprising:
- (a) a rotor hub adapted for attachment to an input shaft;
(b) a brake drum having an annular outer braking surface and an inwardly extending web removably attached to the hub from one side;
(c) a plurality of radially movable brake elements disposed circumferentially about the braking surface;
(d) a housing including a side plate removable from the one side disposed over the brake elements;
(e) a first annular seal operatively disposed for sealing between the housing and the rotor hub, the seal being removable from said one side;
(f) an inflatable disposed between the housing and the brake elements and operable upon inflation to move the brake elements inwardly into contact with the braking surface;
(g) an annular spacer attached to the drum web;
(h) a second annular seal disposed for sealing between the side plate and the spacer, wherein the side plate and drum are removable from the one side for permitting replacement of said first and second annular seal.
5 Assignments
0 Petitions
Accused Products
Abstract
A pneumatic constricting drum brake with rotary seals attached to opposite axial sides of the hub central region for sealing the hub and brake drum. Both rotary seals are accessible for replacement in service by removal of the housing side plate and brake drum without removal of the hub.
-
Citations
14 Claims
-
1. A pneumatic constricting drum brake comprising:
-
(a) a rotor hub adapted for attachment to an input shaft; (b) a brake drum having an annular outer braking surface and an inwardly extending web removably attached to the hub from one side; (c) a plurality of radially movable brake elements disposed circumferentially about the braking surface; (d) a housing including a side plate removable from the one side disposed over the brake elements; (e) a first annular seal operatively disposed for sealing between the housing and the rotor hub, the seal being removable from said one side; (f) an inflatable disposed between the housing and the brake elements and operable upon inflation to move the brake elements inwardly into contact with the braking surface; (g) an annular spacer attached to the drum web; (h) a second annular seal disposed for sealing between the side plate and the spacer, wherein the side plate and drum are removable from the one side for permitting replacement of said first and second annular seal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A method of making a pneumatic constricting drum brake comprising:
-
(a) providing a rotor hub adapted for attachment to an input shaft; (b) providing a brake drum having an annular braking surface and an inwardly extending web and removably attaching the web to the rotor hub from one side thereof; (c) disposing a plurality of radially movable brake elements circumferentially about the braking surface; (d) disposing a housing including a side plate removable from the one side over the brake elements; (e) disposing a first annular rotary seal on the housing, removable from the one side and operative for sealing between the housing and the rotor hub; (f) disposing an inflatable between the brake elements and the housing for, upon inflation, moving the brake elements inwardly into contact with the braking surface; and
,(g) attaching an annular spacer to the drum web and disposing a second annular rotary seal for sealing between the spacer and the side plate. - View Dependent Claims (11, 12, 13, 14)
-
Specification