Attorney Docket No. PK3923598
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`PCT/KR2018/015477
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`[CLAIMS]
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`[Claim 1]
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`A lubricating oil pump device comprising a pump body (100) and a lubricating oil
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`cartridge (200),
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`wherein the pump body (100) comprises:
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`a suction portion (111) which is connected to the lubricating oil cartridge (200) and
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`receives a lubricating oil from the lubricating oil cartridge (200);
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`a discharge portion (112) which is connected to a lubricating oil supply pipe (W) and
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`supplies the lubricating oil to the lubricating oil supply pipe (W);
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`a piston (150) which reciprocates in the pump body (100) to supply the lubricating oil to
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`the pump body (100) from the lubricating oil cartridge (200);
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`a relief valve (160) configured to adjust a pressure inside the pump body (100);
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`a pressure sensor (170) configured to measure the pressure inside the pump body (100);
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`a control portion (300) which controls an operation of the piston (150) and an operation
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`of the relief valve (160);
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`a first pipe (110) formed between the suction portion (111) and the discharge portion
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`(112);
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`an incoming side check valve which prevents the lubricating oil moved to the first pipe
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`(110) between the suction portion (111) and the discharge portion (112) from flowing backward
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`to the lubricating oil cartridge (200);
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`an outgoing side check valve which prevents the lubricating oil supplied to the
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`lubricating oil supply pipe (W) between the suction portion (111) and the discharge portion (112)
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`from flowing backwardto thefirst pipe (110);
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`Attorney Docket No. PK3923598
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`PCT/KR2018/015477
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`a second pipe (120) formed between thefirst pipe (110) andthe relief valve (160);
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`a third pipe (130) formed betweenthe first pipe (110) and the piston (150); and
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`a fourth pipe (140) formed between the first pipe (110) and the pressure sensor (170) and
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`formed betweenthe outgoing side check valve and the lubricating oil supply pipe (W),
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`wherein the pressure sensor (170) senses a pressure inside the pump body (100) through
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`the fourth pipe (140), and
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`wherein the relief valve (160) is connected to the first pipe (110) and the second pipe
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`(120),
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`wherein when the detected pressure exceeds a pressure preset by a user,
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`the control
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`portion (300) controls an operation of the piston (150) to open the third pipe (130) using the
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`pressurerelief signal.
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`[Claim 2]
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`The lubricating oil pump device of claim 1, wherein the relief valve (160) comprises a
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`spring and a valve shaft, and
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`wherein the valve shaft comprises a lubricating oil
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`transfer path for returning the
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`lubricating oil.
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`[Claim 3]
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`The lubricating oil pump device of claim 1, wherein the fourth pipe (140) is formed in an
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`area adjacent to the discharge portion (112) and is spaced apart from and parallel to a transfer
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`pipe at which therelief valve (160) is formed.
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`[Claim 4]
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`Attorney Docket No. PK3923598
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`PCT/KR2018/015477
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`The lubricating oil pump device of claim 1, wherein the fourth pipe (140) is formed in an
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`area adjacent to the discharge portion (112) and is spaced apart from and perpendicular to a
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`transfer pipe at which therelief valve (160) is formed.
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`[Claim 5]
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`A lubricating oil pump device comprising a pump body (100) and a lubricating oil
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`cartridge (200),
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`wherein the pump body (100) comprises:
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`a suction portion (111) which is connected to the lubricating oil cartridge (200) and
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`receives a lubricating oil from the lubricating oil cartridge (200);
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`10
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`a discharge portion (112) which is connected to a lubricating oil supply pipe (W) and
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`supplies the lubricating oil to the lubricating oil supply pipe (W);
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`a piston (150) which reciprocates in the pump body (100) to supply the lubricating oil to
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`the pump body (100) from the lubricating oil cartridge (200);
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`a relief valve (160) configured to adjust a pressure inside the pump body (100);
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`a pressure sensor (170) configured to measure the pressure inside the pump body (100);
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`a control portion (300) which controls an operation of the piston (150);
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`a first pipe (110) formed between the suction portion (111) and the discharge portion
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`(112);
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`an incoming side check valve which prevents the lubricating oil moved to the first pipe
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`(110) between the suction portion (111) and the discharge portion (112) from flowing backward
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`to the lubricating oil cartridge (200);
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`Attorney Docket No. PK3923598
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`PCT/KR2018/015477
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`an outgoing side check valve which prevents the lubricating oil supplied to the
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`lubricating oil supply pipe (W) between the suction portion (111) and the discharge portion (112)
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`from flowing backwardto thefirst pipe (110);
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`a second pipe (120) formed between thefirst pipe (110) andthe relief valve (160);
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`a third pipe (130) formed betweenthe first pipe (110) and the piston (150); and
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`a fourth pipe (140) formed between the outgoing side check valve and the pressure sensor
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`(170) and formed between the outgoing side check valve andthe lubricating oil supply pipe (W),
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`wherein the pressure sensor (170) detects a pressure inside the pump body (100) through
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`the fourth pipe (140) and is configured to transmit a detection signal to the control portion (300)
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`whenthe detected pressure is greater than or equal to a pressureset by a user,
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`wherein the relief valve (160) is connected to the first pipe (110) and the second pipe
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`(120), and
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`wherein the control portion (300) receives the detection signal from the pressure sensor
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`(170) and controls an operation of the piston (150) to open the third pipe (130).
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`[Claim 6]
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`The lubricating oil pump device of claim 1, wherein the pressure sensor (170) comprises
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`a shaft and a pressure sensor which move backward according to a pressure in order to detect a
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`pressure generated by the discharge portion (112) adjacent to the fourth pipe (140) and transmits
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`a measured pressure value to the control portion (300) to maintain uniform pressure of the
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`discharge portion (112).
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`[Claim 7]
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`Attorney Docket No. PK3923598
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`PCT/KR2018/015477
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`The lubricating oil pump device of claim 6, wherein the pressure detection shaft and
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`sensor are located on oneside surface of the pump body (100) or located in a rear bracket
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`attachment space of the pump body (100).
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`[Claim 8]
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`The lubricating oil pump device of claim 1, further comprising a pressure detection valve
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`(172) which measures a pressure transferred from the fourth pipe (140) through a spring
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`adjusting screw, whichsets a particular pressure, and a mobile shaft,
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`wherein the pressure detection valve (172) transmits the measured pressure to the
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`pressure sensor (170).
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`[Claim 9]
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`The lubricating oil pump device of claim 8, wherein a movementdistance of the mobile
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`shaft is adjusted by adjusting the spring adjusting screw of the pressure detection valve (172),
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`and settings of the particular pressure of the pressure detection valve (172) are changed by
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`adjusting the movementdistance of the mobile shaft.
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