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US 11,608,866 B2Granted
Spring brake actuator
AssigneeTSE Brakes, Inc.
InventorsDarin Cate, Kok Gaither-Ho
Life of this patent
Estimating the term…
Abstract
A spring brake actuator is for braking a wheel of a vehicle. The spring brake actuator has an axially elongated housing having a parking brake chamber and a service brake chamber; a main compression spring in the parking brake chamber; a flexible diaphragm in the parking brake chamber; and a pressure plate in the parking brake chamber, the pressure plate located axially between the main compression spring and the flexible diaphragm. The flexible diaphragm has a contoured portion that inhibits radial shifting of the pressure plate with respect to the flexible diaphragm.
Claims12
A spring brake actuator for braking a vehicle, the spring brake actuator comprising:
- a housing having a first chamber and a second chamber,
- a flexible diaphragm separating the first chamber from the second chamber,
- a compression spring in the first chamber, the compression spring being movable into a compressed position and an extended position, and
- a pressure plate between the compression spring and the flexible diaphragm, the pressure plate having a flange having a planar radially outermost diameter,
- wherein the flexible diaphragm comprises a contoured portion having a uniform thickness and a pocket in which the planar radially outermost diameter is disposed, at least when the compression spring is the extended position, the contoured portion wrapping around an entirety of the planar radially outermost diameter, at least when the compression spring is in the extended position, thus inhibiting radial shifting of the pressure plate, at least when the compression spring is in the extended position, and
- wherein the flexible diaphragm has a relaxed state upon removal from the housing, and wherein the contoured portion defines the pocket when the flexible diaphragm is in the relaxed state.
3 more elements
A spring brake actuator for braking a vehicle, the spring brake actuator comprising:
- a housing having a first chamber and a second chamber,
- a flexible diaphragm separating the first chamber from the second chamber,
- a compression spring in the first chamber, the compression spring being movable into a compressed position and an extended position,
- a pressure plate between the compression spring and the flexible diaphragm, the pressure plate having a flange having a planar radially outermost diameter,
- wherein the flexible diaphragm comprises a contoured portion having a uniform thickness and a pocket in which the planar radially outermost diameter is disposed, at least when the compression spring is the extended position, the contoured portion wrapping around an entirety of the planar radially outermost diameter, at least when the compression spring is in the extended position, thus inhibiting radial shifting of the pressure plate, at least when the compression spring is in the extended position, and
- wherein the pressure plate comprises a recessed cavity adjacent a center portion of the flexible diaphragm, and
- a push rod assembly having a first end portion proximate the flexible diaphragm and an opposite, second end portion extending out of the second chamber,
- wherein the first end portion of the push rod assembly comprises an end plate disposed in the recessed cavity, such that the flexible diaphragm is sandwiched between the end plate and the pressure plate.
5 more elements
A spring brake actuator for braking a vehicle, the spring brake actuator comprising a housing having a parking brake chamber and a service brake chamber, a compression spring in the parking brake chamber, a flexible diaphragm in the parking brake chamber, and a pressure plate between the compression spring and the flexible diaphragm,
- wherein the compression spring is axially movable into a compressed position and an extended position, wherein the pressure plate comprises a flange which radially extends to a planar radially outermost diameter,
- wherein the flexible diaphragm comprises a center portion that abuts the flange and a contoured portion,
- wherein the contoured portion has a uniform thickness and defines a pocket in which the planar radially outermost diameter of the pressure plate is disposed, at least when the compression spring is the extended position, and wherein the contoured portion wraps around an entirety of the planar radially outermost diameter of the pressure plate at least when the compression spring is in the extended position and thus inhibits radial shifting of the pressure plate at least when the compression spring is in the extended position, and
- wherein the flexible diaphragm has a relaxed state upon removal from the housing, and wherein the contoured portion defines the pocket when the flexible diaphragm is in the relaxed state.
1 more element
A spring brake actuator for braking a vehicle, the spring brake actuator comprising:
- a housing having a parking brake chamber and a service brake chamber, a compression spring in the parking brake chamber, a flexible diaphragm in the parking brake chamber, and a pressure plate between the compression spring and the flexible diaphragm,
- wherein the compression spring is axially movable into a compressed position and an extended position, wherein the pressure plate comprises a flange radially extends to a planar radially outermost diameter,
- wherein the flexible diaphragm comprises a center portion that abuts the flange and a contoured portion, and
- wherein the contoured portion has a uniform thickness and defines a pocket in which the planar radially outermost diameter of the pressure plate is disposed, at least when the compression spring is the extended position, and wherein the contoured portion wraps around an entirety of the planar radially outermost diameter of the pressure plate at least when the compression spring is in the extended position and thus inhibits radial shifting of the pressure plate at least when the compression spring is in the extended position, and
- a push rod assembly having a first end portion proximate the flexible diaphragm and an opposite, second end portion extending out of the service brake chamber,
- wherein the pressure plate comprises a recessed cavity that mates with the first end portion of the push rod assembly and a center portion of the flexible diaphragm, and
- wherein the first end portion of the push rod assembly comprises an end plate disposed in the recessed cavity, such that the flexible diaphragm is sandwiched between the end plate and the recessed cavity.
4 more elements
Dependencies are inferred from the claim text.