Mounting press
AssigneeBuehler AG
InventorMarvin W. Keith, Jr.
Life of this patent
Estimating the term…
Abstract
A portable hydraulic press for use in preparing metallurgical specimens, is disclosed herein, which requires relatively little force to operate and eliminates repumping during specimen preparation. The press includes a linkage assembly which connects an operating handle to a hydraulic jack in a manner such that both the mechanical advantage of the operating handle and ease of operation of the press is increased. In the embodiment shown, the press is constructed and arranged to provide ease of removal of the hydraulic jack without disassembling the entire press and includes a frame which stores energy.
Claims7
In a portable mounting press for mounting a metallographic specimen in a plastic mount by applying heat and pressure to a mold containing the specimen and plastic molding material, the press having a frame including a pair of upright side frame members, an apertured top member and a base, a hydraulic jack positioned upright on the base between the side frame members and having a jack actuator located at the front of the jack adjacent the lower end thereof and pivotally movable about a horizontal actuator pivot axis, a downwardly biased ram plate positioned above the hydraulic jack for upward movement upon actuation of the jack, an upright ram secured to the top of the ram plate and extending upwardly through an aperture in the top member, a mold fixedly mounted to the top member and having a mold bottom closure member carried on the upper end of the ram, whereby actuation of the jack will raise the mold bottom closure within the mold to increase pressure therein, the improvement comprising improved force transmitting means for operating the jack actuator to increase the stability of the press and eliminate the need for bolting the same down, said force transmitting means including, in combination, a horizontal crank shaft extending between said side frame members, said crank shaft being located substantially above said actuator pivot axis and rearwardly thereof and being rotatable about its own axis, a manually operable generally forwardly extending handle secured to said crank shaft for rotating the same, a plurality of force-transmitting links interconnecting said crank shaft with said jack actuator to effect pivotal movement of said actuator by manual pumping of said handle, said links including a first link mounted to said crank shaft for conjoint rotation therewith, said first link having a length less than the length of said jack actuator thereby producing a mechanical advantage facilitating manual movement of said handle, and at least one additional link interconnecting said first link with said actuator.
Dependencies are inferred from the claim text.