Brake for rollable receiving elements utilized particularly in airplanes

A braking arrangement adapted for use in connection with a rollable cart employed in airplanes, particularly in commercial airplanes,

• comprising in combination
• a longitudinal base plate having relatively narrow end portions of a predetermined width,
• two roller pairs mounted near opposite respective end portions on said base plate, each roller pair having a common axle, said axles being similar to one another,
• at least one brake mechanism mounted on said base plate, and acting on a corresponding of said roller pairs, said brake mechanism including
• a brake rod extending over the roller pair associated therewith, and in parallel with the axle of said roller pair,
• mounting means for said brake rod secured to said base plate therebelow, being located between the rollers of said roller pair, and having a recess on a lower side thereof,
• a rotary disc mounted at least partly within the recess of, and concentrically with said mounting means, having a portion projecting downwardly from said mounting means, being provided with two entrainment lugs, and being movable between two extreme angular positions,
• guide means for said brake rod mounted on said mounting means for restraining and lateral movement of said brake rod, while permitting a movement thereof along a substantially vertical direction,
• said downwardly projecting portion having an outer surface and oppositely disposed radially extending longitudinal indentations, each bordering on one longitudinal side thereof an upright wall, and on the other side thereof a wall inclined with the vertical, each being angularly positioned so that in one angular extreme position of said rotary disc said brake rod rests on said inclined walls in a "brake released" state, while resting in the other angular position in a "brake actuated" state on said outer surface of said outwardly projecting portion,
• a brake pedal downwardly actuatable within the width of an end portion of said base plate, a first lever pivotable on a shaft extending substantially in parallel with said axle, said brake pedal being secured to said first lever, and being disposed in a bracket secured to said base plate near an outer end of said base plate, and farther outwardly than said mounting means, a first tie rod pivotably connecting said first lever to one entrainment lug,
• a brake-release pedal having an initial position and being downwardly actuatable within the width of said end portion of said base plate independently of said first lever, a second lever pivotable on said shaft, said brake-release pedal being secured to said second lever, a second tie rod pivotably connecting said second lever to the other entrainment lug, said tie rods being substantially stressable only in tension,
• whereby each lever is operatively in contact with said brake rod,
• said brake rod being formed as a crank rod near each outer end thereof,
• two adjustable brake elements operatively acting on said rollers of said roller pair, respectively, and in resilient operative contact with said ends of said brake rod, respectively, and
• a torsion spring mounted on said bracket, and being in operative connection with said brake-release pedal, so as to automatically enable said brake-release pedal to return to said initial position in cooperation with a stop mounted on said bracket, following each actuation of said brake-release pedal.