Importance

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Abstract

A linear hydraulic actuator comprises, an outer hydraulic cylinder (11) of internal axial length l.sub.1, a hollow cylindrical slide member(17) of axial length l.sub.2, where l.sub.2 is less than l.sub.1, said slide member (17) being received coaxially within said outer cylinder (11) and being engaged in sealed sliding relationship with the inner surface of said outer cylinder (11), a piston assembly (19) received coaxially within said outer cylinder (11) and said slide member (17) and including a piston head (21) engaged in sealed sliding relationship with the inner surface of said slide member (17) and a piston rod (22) extending from one axial end of said slide member (17) and further extending, in sealed sliding relationship, through one end of said outer cylinder (11). first stop means define first and second axially spaced limit positions of the axial sliding movement of said slide member (17) relative to said outer cylinder (11), and second stop means define first and second axially spaced limit positions of the axial movement of said piston assembly (19) relative to said slide member (17).

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First Claim