초록 ▼

The present application is directed to an improved trim tab actuator. A ram adapted to be connected at a first end to the trim tab and connected at a second end to the drive. The ram has a longitudinal portion equal to at least the maximum stroke of the ram and is received in the longitudinal bore o

The present application is directed to an improved trim tab actuator. A ram adapted to be connected at a first end to the trim tab and connected at a second end to the drive. The ram has a longitudinal portion equal to at least the maximum stroke of the ram and is received in the longitudinal bore of which longitudinal bore has a length equal to or greater than the maximum stroke of the ram. An inboard seal is disposed between the ram and bore, the inboard seal being positioned inboard of the longitudinal portion of the ram when the ram is retracted.

대표청구항 ▼

[ That which is claimed is:] [1.] A trim tab actuator able to position a trim tab on a boat comprising:a watertight housing having a top end and a bottom end and a longitudinal length defined by the distance between the ends;a ram mounted substantially within the housing and extending from the botto

[ That which is claimed is:] [1.] A trim tab actuator able to position a trim tab on a boat comprising:a watertight housing having a top end and a bottom end and a longitudinal length defined by the distance between the ends;a ram mounted substantially within the housing and extending from the bottom end of the housing;a drive connected to the ram for causing longitudinal movement of the ram into and out of the bottom end of the housing for up to a predetermined maximum length;a first seal mounted within the housing and disposed about the ram wherein the first seal is located at the bottom end of the housing;a second seal mounted within the housing and disposed about the ram wherein the second seal is located at a longitudinal distance from the bottom end at least as great as the predetermined maximum length of longitudinal movement of the ram, reby the section of the ram that is exposed outside of the housing during the ram movement into and out of the housing during use when positioning a trim tab never passes through the second seal within the housing.