Inventor · disambiguated record
Masaharu Hiraga
Also filed as: HIRAGA MASAHARU
40 granted patents·1,166 citations·filing 1975–1988
98Inventor score
Top patents by PatentIndex Score
40 records- 0196US4332535AScroll type compressor having an oil separator and oil sump in the suction chamberSANKYO ELECTRIC CO·Filed 1979·Granted Jun 1, 1982·64 cites·7 claims
- 0294US4340339AScroll type compressor with oil passageways through the housingSANKYO ELECTRIC CO·Filed 1980·Granted Jul 20, 1982·61 cites·7 claims
- 0393US4586874ARefrigerant compressor with a capacity adjusting mechanismSANDEN CORP·Filed 1984·Granted May 6, 1986·72 cites·6 claims
- 0493US4466784ADrive mechanism for a scroll type fluid displacement apparatusSANDEN CORP·Filed 1982·Granted Aug 21, 1984·60 cites·17 claims
- 0593US4303379AScroll-type compressor with reduced housing radiusSANKYO ELECTRIC CO·Filed 1979·Granted Dec 1, 1981·43 cites·4 claims
- 0689US4600367ARefrigerant compressor for automobile air-conditioning systemSANDEN CORP·Filed 1984·Granted Jul 15, 1986·49 cites·5 claims
- 0789US4514150AScroll type compressor with displacement adjusting mechanismSANDEN CORP·Filed 1982·Granted Apr 30, 1985·46 cites·6 claims
- 0887US4005948ALubrication system for compressor unitSANKYO ELECTRIC CO·Filed 1975·Granted Feb 1, 1977·42 cites·16 claims
- 0986US4490099AScroll type fluid displacement apparatus with thickened center wrap portionsSANDEN CORP·Filed 1984·Granted Dec 25, 1984·39 cites·15 claims
- 1086US4095921AMulti-cylinder compressor having spaced arrays of cylindersSANKYO ELECTRIC CO·Filed 1976·Granted Jun 20, 1978·41 cites·15 claims
- 1186US4042309ARefrigerant compressorSANKYO ELECTRIC CO·Filed 1975·Granted Aug 16, 1977·37 cites·9 claims
- 1285US4468178AScroll type compressor with displacement adjusting mechanismSANDEN CORP·Filed 1982·Granted Aug 28, 1984·37 cites·7 claims
- 1385US4437820AScroll type fluid compressor unit with axial end surface sealing meansSANDEN CORP·Filed 1981·Granted Mar 20, 1984·34 cites·7 claims
- 1485US4425520AReduced diameter devices with an electromagnetic clutchSANKYO ELECTRIC CO·Filed 1982·Granted Jan 10, 1984·27 cites·8 claims
- 1585US3945765ARefrigerant compressorSANKYO ELECTRIC CO·Filed 1975·Granted Mar 23, 1976·38 cites·12 claims
- 1683US4290345ARefrigerant compressorsSANKYO ELECTRIC CO·Filed 1979·Granted Sep 22, 1981·34 cites·10 claims
- 1781US4456435AScroll type fluid displacement apparatusSANDEN CORP·Filed 1983·Granted Jun 26, 1984·31 cites·17 claims
- 1880US4824346AScroll type fluid displacement apparatus with balanced drive meansSANDEN CORP·Filed 1981·Granted Apr 25, 1989·37 cites·27 claims
- 1979US4547137AScroll type fluid compressor with thickened spiral elementsSANDEN CORP·Filed 1983·Granted Oct 15, 1985·28 cites·8 claims
- 2076US4580956ABiased drive mechanism for an orbiting fluid displacement memberSANDEN CORP·Filed 1985·Granted Apr 8, 1986·32 cites·6 claims
- 2175US4477239AScroll type fluid displacement apparatus with offset wraps for reduced housing diameterSANDEN CORP·Filed 1982·Granted Oct 16, 1984·26 cites·3 claims
- 2275US4474543ARotation prevention device for an orbiting member of a fluid displacement apparatusSANDEN CORP·Filed 1982·Granted Oct 2, 1984·28 cites·4 claims
- 2374US4498852AScroll type fluid displacement apparatus with improved end plate fluid passage meansSANDEN CORP·Filed 1982·Granted Feb 12, 1985·25 cites·18 claims
- 2471US4457676ADriving support mechanism for an orbiting scroll of a scroll type fluid displacement apparatusSANDEN CORP·Filed 1982·Granted Jul 3, 1984·23 cites·5 claims
- 2568US4487248AScroll manufacturing method and toolSANDEN CORP·Filed 1982·Granted Dec 11, 1984·11 cites·8 claims
- 2667US4627800AScroll type fluid displacement compressor with spiral wrap elements of varying thicknessSANDEN CORP·Filed 1985·Granted Dec 9, 1986·28 cites·2 claims
- 2767US4548555AScroll type fluid displacement apparatus with nonuniform scroll heightSANDEN CORP·Filed 1983·Granted Oct 22, 1985·20 cites·3 claims
- 2867US4453899AScroll type fluid displacement apparatus with reinforced wrap sealsSANDEN CORP·Filed 1981·Granted Jun 12, 1984·24 cites·19 claims
- 2963US4880360AVariable displacement compressor with biased inclined memberSANDEN CORP·Filed 1988·Granted Nov 14, 1989·19 cites·11 claims
- 3062US4283166AFluid suction and discharge apparatusSANKYO ELECTRIC CO·Filed 1979·Granted Aug 11, 1981·15 cites·3 claims
- 3161US4039270AFluid suction and discharge apparatusSANKYO ELECTRIC IND LTD·Filed 1975·Granted Aug 2, 1977·16 cites·6 claims
- 3260US4432708AScroll type fluid displacement apparatus with pressure communicating passage between pocketsSANDEN CORP·Filed 1981·Granted Feb 21, 1984·16 cites·8 claims
- 3352US4540355AAxial sealing device for a scroll-type fluid displacement apparatusSANDEN CORP·Filed 1984·Granted Sep 10, 1985·12 cites·6 claims
- 3449US4551078AScroll-type fluid displacement apparatus with angular offset varying meansSANDEN CORP·Filed 1981·Granted Nov 5, 1985·10 cites·6 claims
- 3546US4753583AScroll type fluid compressor with high strength sealing elementSANDEN CORP·Filed 1985·Granted Jun 28, 1988·10 cites·4 claims
- 3642US4551081APulley mechanism for fluid displacement apparatusSANDEN CORP·Filed 1984·Granted Nov 5, 1985·7 cites·3 claims
- 3742US4008005ARefrigerant compressorSANKYO ELECTRIC CO·Filed 1975·Granted Feb 15, 1977·6 cites·7 claims
- 3841US4436465AScroll manufacturing toolSANDEN CORP·Filed 1982·Granted Mar 13, 1984·8 cites·4 claims
- 3938US4433564AScroll manufacturing toolSANDEN CORP·Filed 1982·Granted Feb 28, 1984·6 cites·4 claims
- 4035US4121841ADrive shaft seal for compressor housingSANKYO ELECTRIC CO·Filed 1976·Granted Oct 24, 1978·4 cites·2 claims
Join the waitlist — get patent alerts
Get an alert when Masaharu Hiraga files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →