Portable brinell hardness tester with stented through bore pumping chamber
AssigneeKing Tester Corporation
InventorErnest L. Biddle
Life of this patent
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Abstract
A portable Brinell metal hardness tester has a test head mounted in a carriage, movable vertically along elevating screws, and includes a reciprocable pumping rack movable in response to manual movement of a pumping lever, for pumping hydraulic fluid into a passageway of the tester to increase hydraulic fluid pressure in the tester to a level required for metal hardness testing; and a stent located in the passageway for permitting pumped hydraulic fluid to flow through the passageway into a test head portion of the tester to apply hydraulic fluid to the ball contacting the test piece and interferingly stopping the rack upon movement of the rack into the passageway by a preselected amount.
Claims16
A portable Brinell metal hardness tester having a test head mounted in a movable carriage riding elevating screws, for applying preselected force to a test piece by manual pumping to apply hydraulic fluid pressure to a ball contacting the test piece, comprising:
- (a) a reciprocable pumping rack movable in response to movement of a pumping lever, for pumping hydraulic fluid into a passageway of the test head to increase hydraulic fluid pressure in the test head to a level required for metal hardness testing, wherein the rack is movable perpendicularly to the passageway;
- (b) a stent located in the passageway for pumped hydraulic fluid flow through the passageway into a test head of the tester to apply hydraulic fluid to the ball, the stent contacting and interferingly stopping the rack upon movement of the rack into the passageway by a preselected amount, wherein the stent is tubular and is co-axial with the passageway.
A portable Brinell metal hardness tester, comprising:
- (a) a pumping rack movable in a fluid duct extending through a test head, for pumping hydraulic fluid from the duct into a passageway with which the duct communicates in the test head, to increase hydraulic fluid pressure in the test head to a level required for metal hardness testing, wherein the duct and the passageway are perpendicular to one another;
- and
- (b) a member positioned in the duct at the end thereof communicating with the passageway, the member halting movement of the pumping rack along the duct toward the passageway upon contact therewith, wherein the member is tubular and is co-axial with the passageway.
Dependencies are inferred from the claim text.