Ram air turbine (RAT) restow pump drive system
AssigneeHamilton Sundstrand Corporation
InventorsPrzemysław Kiełczykowski, Damian Adam Słodczyk
Life of this patent
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Abstract
A drive system for operating a ram air turbine (RAT) re-stow pump assembly includes a pump piston and a cylinder in which the pump piston moves axially in a reciprocating linear motion when driven by the drive system. The drive system includes a rotary drive shaft and a linear link member having a first end connected to the rotary drive shaft and a second end arranged to be connected, in use, to the pump piston of the RAT re-stow pump. Rotation of the drive shaft is translated to reciprocal linear motion of the piston when connected to the link member, via the link member. The drive shaft is provided with an attachment fitting configured to attach to a rotary power tool, in use, to drive rotation of the drive shaft.
Claims20
A drive system for operating a ram air turbine (RAT) re-stow pump assembly comprising a pump piston and a cylinder in which the pump piston moves axially in a reciprocating linear motion when driven by the drive system, the drive system comprising:
- a rotary drive shaft;
- a linear link member having a first end connected to the rotary drive shaft and a second end arranged to be connected, in use, to the pump piston of the RAT re-stow pump assembly, the link member configured such that rotation of the drive shaft is translated to reciprocal linear motion of the piston when the piston is connected to the link member;
- wherein the drive shaft is provided with an attachment fitting configured to attach to a rotary power tool, in use, to drive rotation of the drive shaft;
- and
- wherein the linear link member is connected to the drive shaft such that the first end of the linear link member rotates with rotation of the rotary drive shaft but also that the linear link member pivots relative to the rotary drive shaft as the rotary drive shaft rotates.
A ram air turbine (RAT) re-stow pump assembly comprising:
- a pump assembly housing configured to accommodate a pump piston reciprocally linearly moveable within a cylinder;
- and
- a drive system comprising:
- a rotary drive shaft;
- a linear link member having a first end connected to the rotary drive shaft and a second end connected to the pump piston, the link member configured such that rotation of the drive shaft is translated to reciprocal linear motion of the piston;
- wherein the linear link member is connected to the rotary drive shaft such that the first end of the linear link member rotates with rotation of the rotary drive shaft but also that the linear link member pivots relative to the rotary drive shaft as the rotary drive shaft rotates;
- and
- wherein the drive shaft is provided with an attachment fitting configured to attach to a rotary power tool, in use, to drive rotation of the drive shaft.
A ram air turbine (RAT) assembly comprising:
- a RAT;
- a RAT actuator;
- and
- a RAT re-stow pump assembly configured to re-stow the RAT via the RAT actuator, wherein the RAT re-stow pump assembly comprises:
- a pump assembly housing configured to accommodate a pump piston reciprocally linearly moveable within a cylinder;
- and
- a drive system comprising:
- a rotary drive shaft;
- and
- a linear link member having a first end connected to the rotary drive shaft and a second end connected to the pump piston, the link member configured such that rotation of the drive shaft is translated to reciprocal linear motion of the piston;
- wherein the linear link member is connected to the rotary drive shaft such that the first end of the linear link member rotates with rotation of the rotary drive shaft but also that the linear link member pivots relative to the rotary drive shaft as the rotary drive shaft rotates;
- and
- wherein the drive shaft is provided with an attachment fitting configured to attach to a rotary power tool, in use, to drive rotation of the drive shaft.
Dependencies are inferred from the claim text.