Patent ID: 11867072
Assignee: WOODWARD, INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A fluid actuator comprising:
an inner cylindrical housing having a first end, a second end opposite the first end, and a first inner wall;
a piston comprising a piston head configured to fluidically seal against the first inner wall and configured to move axially along a portion of the first inner wall;
an outer cylindrical housing arranged at least partly about the inner cylindrical housing, the outer cylindrical housing having a third end, a fourth end opposite the third end, and a second inner wall;
an annular cavity defined between the outer cylindrical housing and the inner cylindrical housing;
a first moveable plate configured to fluidically seal against the second inner wall and configured to move axially along a first portion of the second inner wall between the first end and the third end, configurably seal against the first end in a first configuration such that the piston head, the first inner wall, and the first moveable plate define a first fluid chamber, and configurably unseal the first end in a second configuration such that fluid flow is permitted between the first fluid chamber and the annular cavity; and
a second moveable plate configured to fluidically seal against the second inner wall and configured to move axially along a second portion of the second inner wall between the second end and the fourth end.