266,995. Stack, J. C. Aug. 18, 1926. Jacks.-To prevent injury to the pump cylinder of a hydraulic jack, the cylinder is enclosed in a protective casing. The pump cylinder 3 for actuating the ram 1 of a hydraulic jack is surrounded by a casing 7 secured in position by set-screws 8. The handle 9 actuates the pump by means of an arm 4 engaging a slotted enlargement 10 on the pump rod 5. The casing 7 prevents injury to the pump cylinder through the lower part of the slotted enlargement striking the cylinder at the bottom of its stroke.
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