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US 12,337,951 B2Granted
Single bushing supported pneumatic actuators
AssigneeHamilton Sundstrand Corporation
InventorsRobert DeFelice, Maciej Luczynski
Life of this patent
Estimating the term…
Abstract
A pneumatic actuator can include a housing and an actuator shaft disposed within the housing and configured to actuate between a first position and a second position. The pneumatic actuator can include a single bushing located within the housing between the housing and the actuator shaft. The single bushing can be configured to support the actuator shaft without the actuator shaft being supported at a second location while allowing actuator motion under set operating conditions.
Claims19
A pneumatic actuator, comprising:
- a housing forming both a crank cavity and an actuator cavity;
- an actuator shaft disposed within the housing and configured to actuate between a first position and a second position;
- a bushing located within the housing between the housing and the actuator shaft, wherein the bushing is between the crank cavity and the actuator cavity, and wherein the bushing is configured to support the actuator shaft without the actuator shaft being supported at a second location while allowing actuator motion under set operating conditions, wherein the bushing comprises a length to diameter ratio greater than 1;
- a shaft seal between the housing and the actuator shaft, wherein the shaft seal is between the crank cavity and the actuator cavity;
- a pneumatic cup connected to a first end of the actuator shaft, wherein the pneumatic cup is within the actuator cavity;
- and
- a drive connection assembly connected to a second end of the actuator shaft, wherein the drive connection assembly is within the crank cavity.
4 more elements
An aircraft pneumatic system, comprising:
- a pneumatic actuator, comprising:
- a housing forming both a crank cavity and an actuator cavity;
- an actuator shaft disposed within the housing and configured to actuate between a first position and a second position;
- a bushing located within the housing between the housing and the actuator shaft, wherein the bushing is between the crank cavity and the actuator cavity, wherein the bushing is configured to support the actuator shaft without the actuator shaft being supported at a second location while allowing actuator motion under set operating conditions, and wherein the bushing has a length to diameter ratio greater than 1;
- and
- a shaft seal between the housing and the actuator shaft, wherein the shaft seal is between the crank cavity and the actuator cavity.
3 more elements
A pneumatic actuator, comprising:
- a housing comprising:
- a crank cavity;
- an actuator cavity;
- a partition wall between the crank cavity and the actuator cavity;
- and
- a support tube formed on the partition wall and extending from the partition wall into the actuator cavity;
- an actuator shaft disposed within the housing and extending from the actuator cavity to the crank cavity through the support tube, wherein the actuator shaft comprises:
- a pneumatic cup at a first end of the actuator shaft, wherein the pneumatic cup is in the actuator cavity;
- and
- a drive connection assembly at a second end of the actuator shaft, wherein the drive connection assembly is in the crank cavity;
- a bushing located within the support tube and between the actuator shaft and the support tube, and wherein the bushing comprises a length to diameter ratio greater than 1.
8 more elements
Dependencies are inferred from the claim text.