Patent ID: 6926261

Claim:
A linear jack comprising: an outer tube having a first interior, a first top end, and a first bottom end; an inner tube having a second interior, a second top end, a second bottom end, and being slidable inside the outer tube; a threaded insert fixedly attached to the inner tube proximal to the second top end of the inner tube; a rotatable screw shaft translationally fixed relative to the outer tube and threadedly coupled to the insert, wherein turning the screw shaft a first direction extends the inner tube from the first bottom end of the outer tube, and turning the screw a second direction retracts the inner tube into the first bottom end of the outer tube; a jack interior defined by the combination of the first interior of the outer tube and the second interior of the inner tube; and a lubrication fitting in fluid communication with the jack interior wherein the second top end of the inner tube includes a notch aligned with the lubrication fitting, wherein lubrication may pass into the jack interior through the notch and the second top end of the inner tube may extend upwardly past the lubrication fitting.