Abstract: Disclosed is a hydraulic pilot valve which is provided with an orifice so as to reduce vibration of a valve and minimize impact applied to a valve even when a valve is suddenly operated. At least some of hydraulic oil supplied to a supply chamber flows to a valve chamber or a central pipeline through a damping unit according to elevation of a spool.

Abstract: Disclosed is a hydraulic pilot valve which is provided with an orifice so as to reduce vibration of a valve and minimize impact applied to a valve even when a valve is suddenly operated. At least some of hydraulic oil supplied to a supply chamber flows to a valve chamber or a central pipeline through a damping unit according to elevation of a spool.

Abstract: An excavator pedal valve, including: a body part in which a flow path for controlling forward and backward traveling is formed in a front and a rear of an interior in a vertical direction; a cam part provided at an upper end of the body part and provided so as to be rotatable in a forward direction and a rear direction with respect to a central axis by driving of a pedal; a rod part provided in each of a front lower portion and a rear lower portion of the cam part to apply force in a vertical direction along the flow path of the body part; and a return elastic part provided in a lower portion of the rod part to return the rod part upward. A rotation part is formed at a lower portion of the cam part having a contact surface with the rod part.

Abstract: An excavator pedal valve, including: a body part in which a flow path for controlling forward and backward traveling is formed in a front and a rear of an interior in a vertical direction; a cam part provided at an upper end of the body part and provided so as to be rotatable in a forward direction and a rear direction with respect to a central axis by driving of a pedal; a rod part provided in each of a front lower portion and a rear lower portion of the cam part to apply force in a vertical direction along the flow path of the body part; and a return elastic part provided in a lower portion of the rod part to return the rod part upward. A rotation part is formed at a lower portion of the cam part having a contact surface with the rod part.

Abstract: Disclosed is nano powder formed of a solid solution including crystalline silver and amorphous copper. The metal nano powder has peaks in X-ray powder diffraction spectrum using a Cu-K? radiation of 38.18±0.2, 44.6±0.2, 64.50±0.2, 77.48±0.2 and 81.58±0.2 at a diffraction angle of 2?. A composition ratio of silver:copper of the metal nano powder is 5.0 to 8.0:2.0 to 5.0 at %.

Abstract: A heat sink apparatus for an exothermic element includes a first copper heat plate for accumulating heat of an exothermic element, a copper heat path for conducting the accumulated heat in an extended direction of the copper heat path, a second copper heat plate for dispersing the conducted heat, and a heat fin for discharging the accumulated or discharged heat to the outside.