RAT actuator fine adjustment assembly
First Claim
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1. A ram air turbine system comprising:
- a hydraulic actuator having a hydraulic cylinder housing with a threaded portion;
a rod having a threaded region at or near one end and an eyelet at an opposite end; and
a rotatably adjustable bushing having a first thread engaged with the threaded portion of the hydraulic cylinder housing, and a second thread engaged with the threaded region of the rod, such that an actuation force can be transmitted between the hydraulic actuator and the rod through the bushing, wherein the bushing is rotatable relative to the hydraulic cylinder housing and the rod, and wherein the first and second threads of the bushing have different pitches.
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Abstract
A ram air turbine system includes an actuator having a threaded portion, a rod having a threaded region at or near one end and an eyelet at an opposite end, and a bushing. The bushing has a first thread engaged with the threaded portion of the actuator, and a second thread engaged with the threaded region of the rod, such that an actuation force can be transmitted between the actuator and the rod through the bushing. The first and second threads of the bushing have different pitches.
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Citations
20 Claims
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1. A ram air turbine system comprising:
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a hydraulic actuator having a hydraulic cylinder housing with a threaded portion; a rod having a threaded region at or near one end and an eyelet at an opposite end; and a rotatably adjustable bushing having a first thread engaged with the threaded portion of the hydraulic cylinder housing, and a second thread engaged with the threaded region of the rod, such that an actuation force can be transmitted between the hydraulic actuator and the rod through the bushing, wherein the bushing is rotatable relative to the hydraulic cylinder housing and the rod, and wherein the first and second threads of the bushing have different pitches. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for use with a hydraulic actuator assembly for a ram air turbine, the method comprising:
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providing a ram air turbine system having a hydraulic actuator comprising; a rod having a threaded region at or near one end and an eyelet at an opposite end; and a hydraulic cylinder housing with a threaded portion; and operably engaging a rotatably adjustable bushing by rotating the bushing relative to the hydraulic cylinder housing and the rod, wherein the bushing has a first thread engaged with the threaded portion of the hydraulic cylinder housing, and a second thread engaged with the threaded region of the rod, such that an actuation force can be transmitted between the actuator and the rod through the bushing, and wherein the first and second threads of the bushing have different pitches. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A ram air turbine system carried relative to an airframe element, the system comprising:
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a deployable turbine assembly having a turbine supported by a strut; a hydraulic actuator having a hydraulic actuator cylinder housing having a threaded portion and a spring; a rod having a threaded region at or near one end and an eyelet at an opposite end; and a bushing having a first thread engaged with the threaded portion of the hydraulic cylinder housing, and a second thread engaged with the threaded region of the rod, such that an actuation force can be transmitted between the actuator and the rod through the bushing, wherein the first thread of the bushing has a coarse pitch, wherein the second thread of the bushing has a fine pitch, and wherein the bushing is rotatably adjustable while the rod and the threaded portion of the hydraulic cylinder housing are rotationally stationary. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification