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Patent
Sumitomo Precision Products | Date: 2016-08-23

A hydraulic cylinder includes: a cylinder tube; a piston; a piston rod; a pair of end covers; and a snubbing mechanism configured to reduce the moving speed of the piston after the piston reaches the vicinity of the end of its stroke. The snubbing mechanism includes: a supply/discharge port formed in an associated one of the end covers; a valve configured to open and close the supply/discharge port; a connector configured to connect the valve and the piston together; and at least one recess extending from the edge of the supply/discharge port. When the piston approaches the end of its stroke, the valve closes the supply/discharge port to form a throttle oil passage, and hydraulic oil is discharged through the throttle oil passage to reduce the moving speed of the piston.


Patent
The Society Of Japanese Aerospace Companies, Kawasaki Heavy Industries and Sumitomo Precision Products | Date: 2016-06-08

A method of attenuating noise of aircraft comprises researching a static pressure and an airflow velocity in a region in the vicinity of an original shape of a designed object as a flow field characteristic of the region in the vicinity of the original shape (S5), and adding a plate-shaped object for covering a surface of the original shape which is different from a surface of the original shape facing an upstream side in an airflow direction (S7) to increase the static pressure in the region in the vicinity of the original shape to reduce the airflow velocity, thereby attenuating aerodynamic noise of the designed object.


Patent
Sumitomo Precision Products | Date: 2016-11-30

A plate fin heat exchanger 1 includes a corrugated fin 3 and tube plates 2. An intermediate portion 33 of the corrugated fin between crest and trough portion 31 and 32 thereof has a plurality of protruding ribs 34 protruding beyond a surface of the corrugated fin and arranged in a first direction. Surfaces of the crest and trough portions being in contact with the tube plates are configured as contact surfaces 310, 320 with no protruding rib. Gently sloping portions 341 are provided between the protruding ribs and the contact surfaces of the crest and trough portions to gradually protrude from the surface of the corrugated fin with increasing distance from the contact surfaces, and are continuous with the protruding ribs.


Patent
Sumitomo Precision Products | Date: 2016-05-18

An object is to provide a highly-efficient evaporator capable of effectively avoiding reduction in steam generation efficiency due to the Leidenfrost phenomenon while maintaining a heating surface in a heating chamber for steam generation in a high-temperature region to be subjected to the influence of the Leidenfrost phenomenon by not reducing heating power required for heating the inside of the heating chamber from outside or not heat-insulating the heating chamber. To achieve this object, a sleeve-like sheet made of foamed nickel is disposed as a foamed member 64 containing metal as a principal component near a heating surface 69 and along an entire periphery of the heating surface 69 in a heating chamber 68 formed inside a pipe body 67 to be heated from the outside in such a manner as to contact the heating surface 69. While water supplied to the inside of the sleeve-like sheet passes through this inside, the water is diffused to permeate the surrounding sleeve-like sheet. Evaporation of the water is finished before the water reaches the heating surface 69.


Patent
Sumitomo Precision Products | Date: 2016-09-14

A mirror device 200 disclosed herein includes a base 202, a mirror 205, an actuator 206, a fixed comb electrode 208, and a movable comb electrode 207. The movable comb electrode 207 includes: a beam portion 271; a hinge 273 configured to couple the beam portion 271 to the actuator 206 and having lower rigidity than the beam portion 271; a hinge 274 configured to couple the beam portion 271 to the base 202 and having lower rigidity than the beam portion 271; and electrode fingers 272, 272, . . . provided for the beam portion 271 and facing electrode fingers 281, 281, . . . of the fixed comb electrode 208. The movable comb electrode 207 is configured to tilt around a tilt axis B5 that passes through the hinge 274.


Patent
Sumitomo Precision Products | Date: 2016-09-14

A mirror device 300 disclosed herein includes: a base 302; a mirror 305; an actuator 306; an extension 304 provided on the other side of the mirror 305 with respect to an X-axis opposite from the actuator 306; a fixed comb electrode 308; and a movable comb electrode 307 provided on the other side of the mirror 305 with respect to the X-axis opposite from the actuator 306. The movable comb electrode 307 includes: a beam portion 371 coupled to the mirror 305 via a hinge 373; and electrode fingers 372 provided for the beam portion 371. The extension 304 is coupled to the base 302 via a hinge 341, and the mirror 305 tilts around a principal axis passing through the hinge 341.


Patent
Sumitomo Precision Products | Date: 2016-03-22

At the first etching step of etching an SOI substrate from a first silicon layer side, a portion of a first structure formed of the first silicon layer is formed as a pre-structure having a larger shape than a final shape. At the mask formation step of forming a final mask on a second silicon layer side of the SOI substrate, a first mask corresponding to the final shape of the first structure is formed in the pre-structure. At the second etching step of etching the SOI substrate from the second silicon layer side, the second silicon layer and the pre-structure are, using the first mask, etched to form the final shape of the first structure.


Patent
Sumitomo Precision Products | Date: 2016-03-22

A mirror device includes a frame body, a mirror configured to tilt about a Y-axis with respect to the frame body, a fixed inner comb electrode including a plurality of electrode fingers arranged in the arrangement direction along the Y-axis and provided at the frame body, and a movable inner comb electrode including a plurality of electrode fingers arranged in the arrangement direction and provided at the mirror, the electrodes fingers of the fixed inner comb electrode and the movable inner comb electrode being alternately arranged. The mirror includes a mirror body and an extension extending from the mirror body. Some of the electrode fingers of the movable inner comb electrode are provided at the mirror body, and another electrode fingers of the movable inner comb electrode are provided at the extension.


Patent
Sumitomo Precision Products | Date: 2016-07-06

Each of power-generating elements 2 stacked on top of each other includes a plate-like cell 10, an anode plate 30, and a cathode plate 50. The cathode plate 50 includes a plurality of first gas passages 58 which extend from an end portion of the cell 10 to an opposite end portion of the cell 10, and a plurality of second gas passages 61 which are sandwiched between the first gas passages 58 and the cell 10, which extend in a direction intersecting an extending direction of the first gas passages 58, which are exposed toward the cell, and each of which communicates with at least two of the first gas passages 58 in a vicinity of an intersection in a direction in which the cathode plate is stacked.


Patent
Sumitomo Precision Products | Date: 2016-08-03

This aircraft heat exchanger includes a heat exchanger body, which includes: a temperature raising section configured at least to raise a temperature of the heat exchanger body locally; and a heat exchanging section configured to exchange heat between an aircraft fuel and oil. The temperature raising section has an inlet for the oil, and has its temperature raised by the oil that has entered the heat exchanger body through the inlet. The heat exchanging section has an outlet for the aircraft fuel. The oil that has passed through the temperature raising section is introduced into the heat exchanging section from around the outlet for the aircraft fuel. The heat exchanging section is configured to have counter flows.

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