Patents and Utility Models

Patent Status Chart

Patent Status Chart

As of June 1, 2017
Includes applications by Fuji Giken and Fuji (Foshan) Electronics, Ltd.

Fuji Denshi hold and has been applying about 450 Patents/Utility models.

(Patent:144 / U.Model:26 / Design:39 / total:209)

Crank-shaft concern

【Transformer hanging method】
100342 U.Model2503715 Crank-shaft Hardening M/c. Transformer supporing device
100347 U.Model2145429 Transformer for Crank-shaft High Frequency Coil
100405 U.Model2536311 High Frequency Hardening M/c./Coil
100406 U.Model2526273 Crank-shaft High Frequency Induction hardening M/c.
100458 Patent3136347 Longitudinal work(Shaft) High Frequency Induction heater
100564 Patent3532442 Crank-shaft High Frequency Induction heater
100565 Patent3455129 Crank-shaft High Frequency Induction heater
100574 Patent3369506 Hanger device
【Disc transformer】
100234 Patent1870396 High Frequency Induction Hardening M/c.Disc type
Transformer 2ndary Coil
100316 U.Model2519060 Transformer for High Frequency Hardening M/c.Coil
100322 Patent2106560 High Frequency Induction Hardening M/c. Disc type current Transformer 2ndary Coil
【Coil】
100253 U.Model2546860 High Frequency Hardening M/c. Coil&current Transformer
100269 Patent1995025 Crank-shaft Semi Open Coil High Frequency Hardening M/c. Coil mfg. method
100286 Patent1995035 Crank-shaft Semi Open Coil High Frequency Hardening M/c. Coil mfg. method
100295 Patent1995036 Crank-shaft Semi Open Coil High Frequency Hardening M/c. Coil mfg. method
100338 U.Model2530509 High Frequency Hardening M/c. Coil
100360 U.Model2522049 Crank-shaft High Frequency Induction hardening M/c.
100402 U.Model2536310 High Frequency hardening Coil
100490 Design1006784 Hardening cooling water spray jacket guide plate
100491 Design1022503 Metalhardening High Frequency Hardening M/c.&Coil
100539 Patent3304305 High Frequency hardening Coil fitting method&High Frequency Induction hardening M/c.
100576 Patent3435096 Coil gap measuring device
100639 Patent3623924 Induction Hardening M/c. Coil
100640 Design1147305 High Frequency Hardening M/c. Coil
400003 Design819214 High Frequency hardening Coil
【Coil spacer】
100492 Design1022504 Metal hardening High Frequency hardening Coil spacer
100623 Design1135855 Crank-shaft Hardening M/c. Coil spacer holder
【Work supporting method 】
100154 Patent1626562 High Frequency hardening work supporting device
100170 Patent1723780 Crank-shaft High Frequency hardening method&the device
100410 U.Model2529869 Crank-shaft High Frequency heat treatment device
【Power reduction】
100164 Patent1807696 Crank-shaft High Frequency surface hardening method
100167 Patent1749070 Crank-shaft pin, High Frequency surface hardening method
100190 Patent1875478 High Frequency hardening method
100359 Patent2772448 4cylinder engine Crank-shaft High Frequency Induction hardening M/c.
100427 Patent2739421 Crank-shaft pin High Frequency hardening method
100554 Patent3408978 Crank-shaft High Frequency hardening method
100616 Patent3499498 High Frequency heat treatment device
【 Cooling 】
100197 Patent1809326 Crank-shaft High Frequency hardening method
【Device】
100203 Patent1876820 Crank-shaft High Frequency hardening reheating method&device
100303 Patent2115739 Crank-shaft transportation device
100331 U.Model2529861 Crank-shaft positioning device
100333 Patent2086395 Crank-shaft transportation device&transportation method
100349 Patent2592023 Crank-shaft High Frequency Hardening M/c.method&the device
100358 Patent2588095 Crank-shaft High Frequency Hardening M/c.method
100364 U.Model2542117 Crank-shaft High Frequency Induction hardening M/c.
100395 Patent2764673 Crank-shaft High Frequency Induction hardening M/c.&the Crank-shaft High Frequency hardening method
100397 Patent2709558 Crank-shaft High Frequency Induction hardening M/c.&the Crank-shaft High Frequency hardening method
100538 Patent3350452 Crank-shaft High Frequency hardening method&High Frequency Induction hardening M/c.
100539 Patent3304305 High Frequency hardening Coil fittig method&the High Frequency Induction hardening M/c.
100546 Patent3309246 Crank-shaft High Frequency hardening method&High Frequency Induction hardening M/c.
100550 Patent3309310 Crank-shaft High Frequency hardening method&High Frequency Induction hardening M/c.
100566 Patent3328601 load weight measuring measuring device&pin st. load weight measuring device
100567 Patent3408989 Crank-shaft High Frequency Induction hardening M/c.
100576 Patent3435096 Coil gap measuring device
100618 Patent3499501 Longitudinal work(Shaft) hardening device
100663 Patent3383297 Load weight measuring device
from record in July 2005.

Shaft

100156 Patent1626563 Work centering method considered to the distortion by High Frequency heat treatment
100165 Patent1726125 Longitudinal work(shaft) High Frequency hardening method
100183 Patent1807712 High Frequency hardening method
100212 Patent2030604 High Frequency Induction hardening M/c.
100238 Patent2137211 High Frequency Induction hardening M/c.
100327 Patent2684484 Longitudinal work(shaft) High Frequency Hardening M/c. method & device
100371 U.Model2531332 High Frequency Hardening M/c. Coil
100372 Patent2623410 High Frequency Induction hardening M/c.
100414 U.Model2528960 Numerous longitudinal work(shaft) High Frequency Induction hardening M/c.
100434 U.Model2570969 High Frequency Induction Hardening M/c. Coil
100462 Patent2913615 Isolation material&the use on High Frequency Induction heater
100469 Patent2914615 Hardening M/c. width adjustable Hardening M/c. device
100487 Patent3017088 Scan hardening method&the material use on supporting device
100496 Patent3035237 High Frequency Induction heater
100497 Patent3158384 Longitudinal work(shaft) scan hardening method
100516 Design1047334 High Frequency Hardening M/c. Coil
100516 Design1047330 High Frequency Hardening M/c. Coil
100516 Design1047331 High Frequency Hardening M/c. Coil
100516 Design1047333 High Frequency Hardening M/c. Coil
100516 Design1047329 High Frequency Hardening M/c. Coil
100516 Design1047332 High Frequency Hardening M/c. Coil
100542 Patent3117008 Hardening length adjustable Hardening M/c.&device
100598 Patent3545278 Scan hardening cooling&scan hardening device

Ball screw

100215 Patent1968304 High Frequency scan hardening/re-heating method&device
100562 Patent3490331 High Frequency Induction hardening M/c.&the use of hardening control method

Ring type work

100275 Patent2119845 Inner wall hardening method&device
100381 Patent2731883 Inner wall High Frequency Induction hardening M/c.
100435 U.Model2576939 Thin ring type work holding jig&thin ring type work hardening device

Gear

100179 Patent1807710 Gear High Frequency hardening method
100273 U.Model2146242 Turn table type High Frequency Induction hardening M/c.
100278 Patent2676567 Gear High Frequency hardening method
100513 Patent3347030 High Frequency Induction hardening M/c.&method
100530 Patent3584959 High Frequency Induction hardening M/c.&method

Longitudinal work with different diameter on a shaft

100173 Patent1839998 High Frequency hardening M/c. Coil&the use of Coil for surface hardening device
100199 Patent1809327 High Frequency hardening method&device
100227 Patent1944654 High Frequency back&forth scan hardening method&device
100257 Patent2654869 High Frequency Induction Hardening M/c. Coil
100259 Patent1990564 High Frequency Induction Hardening M/c. Coil
100432 U.Model256901 4 work centering
100474 Patent2872943 High Frequency Hardening M/c. Coil

Longitudinal work

100419 Patent2569011 Circle type longitudinal work High Frequency scan hardening Coil
100421 Patent2748218 Longitudinal work(Shaft) High Frequency scan hardening method & device
100422 U.Model2554388 Longitudinal work(Shaft) High Frequency scan hardening Coil
100423 Patent2748219 Longitudinal work(Shaft) High Frequency scan hardening method & device
100536 Patent3304303 Longitudinal work High Frequency Induction hardening M/c.
100563 Patent3416556 Longitudinal work work hardening device

Tube/Stem type work (includes CVJ)

100141 Patent1622962 High Frequency inner wall hardening Coil
100242 U.Model2117872 Inner wall hardening device
100258 Patent1990563 Induction Hardening M/c. Coil
100271 U.Model2092548 Inner wall hardening High Frequency Hardening M/c. Coil
100388 U.Model2532031 Inner wall hardening Coil
100394 Patent2709556 Thin ring type work piece High Frequency hardening method
100460 Patent3136348 Thicker tube work piece inner wall cooling device
100494 Design1019073 Tube type work positioning jig
100509 Patent3309954 Tube type work with bottom High Frequency Induction hardening M/c.&High
Frequency hardening method
100510 Design1047305 High Frequency scan hardening Coil
100511 Design1047310 High Frequency scan hardening Coil
100512 Design1047311 High Frequency scan hardening Coil
100514 Patent3164539 High Frequency Induction hardening M/c.
100519 Patent3172133 High Frequency Induction hardening M/c.&method
100520 Patent3164547 Cooling Jacket&the use on High Frequency inner wall scan hardening Coil
100521 Patent3505634 Grooves on inner wall on Tube type work index positioning device
100529 Patent3403329 Tube type work High Frequency Hardening M/c. Coil
100549 Patent3273925 Tube type work inner wall hardening cooling Jacket.
100558 Patent3408982 CVJoint High Frequency Induction hardening M/c.
100610 Patent3455152 High Frequency Induction hardening M/c.
100630 Design1117014 Metal work High Frequency Hardening M/c.Coil
100637 Design1135861 Metal work High Frequency Hardening M/c.Coil core

Cam

100152 Patent1626561 High Frequency Induction Hardening M/c.
100606 Patent3499486 Numerous Cams simulteneous hardening device
100615 Patent3522636 Eccentric driving device
100629 Patent3618658 Heat treatment device for a workpiece of being distorted
100641 Patent3618690 Cam shaft hardening device
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