(12) International Application Status Report

Received at International Bureau: 26 August 2018 (26.08.2018)

Information valid as of: 11 February 2020 (11.02.2020)

Report generated on: 20 February 2020 (20.02.2020)

(10) Publication number: (43) Publication date: (26) Publication language:
WO 2019/03289414 February 2019 (14.02.2019) English (EN)

(21) Application number: (22) Filing date: (25) Filing language:
PCT/US2018/04610409 August 2018 (09.08.2018) English (EN)

(31) Priority number(s): (32) Priority date(s): (33) Priority status:
62/543,305 (US)09 August 2017 (09.08.2017) Priority document received (in compliance with PCT Rule 17.1)

(51) International Patent Classification:
F16J 9/26 (2006.01); F16J 1/08 (2006.01); F02F 3/00 (2006.01); F02F 5/00 (2006.01)

(71) Applicant(s):
MAINSPRING ENERGY, INC. [US/US]; 3601 Haven Avenue Menlo Park, CA 94025 (US) (for all designated states)

(72) Inventor(s):
SVRCEK, Matt; 163 Santiago Avenue Redwood City, CA 94061 (US)

(74) Agent(s):
SHVARTS, Alexander; Haley Guiliano LLP 75 Broad Street, Suite 1000 New York, NY 10004 (US)

(54) Title (EN): PISTON SEAL WITH SOLID LUBRICANT APPLICATOR
(54) Title (FR): JOINT DE PISTON COMPRENANT UN APPLICATEUR DE LUBRIFIANT SOLIDE

(57) Abstract:
(EN): A ringset (220, 230) is configured to be arranged on a piston (226) for sealing a gas in a high-pressure region of a cylinder (260) in the absence of oil or other liquid lubricant. The ringset includes one or more rings made from a high-strength material as a sealing element. The ringset also includes a solid lubricant applicator (261) configured to provide lubrication between the one or more rings and a bore (262) of the cylinder. For example, the ring can support pressure loads from high-pressure gas without breaking, while the applicator need not act as a seal. As the piston reciprocates in the bore, the applicator slides against the bore and applies solid lubricant material to the bore, resulting in a solid lubricant film on the bore against which the sealing element may slide. The applicator includes a material such as a graphite, a polymer, or other suitable solid lubricant.
(FR): L'invention concerne un ensemble anneau (220, 230) conçu pour être disposé sur un piston (226) pour sceller un gaz dans une région à haute pression d'un cylindre (260) en l'absence d'huile ou d'un autre lubrifiant liquide. L'ensemble anneau comprend un ou plusieurs anneaux fabriqués à partir d'un matériau à haute résistance en tant qu'élément d'étanchéité. L'ensemble anneau comprend également un applicateur de lubrifiant solide (261) conçu pour assurer une lubrification entre le ou les anneaux et un trou (262) du cylindre. Par exemple, l'anneau peut supporter des charges de pression provenant d'un gaz à haute pression sans subir de rupture, tandis que l'applicateur n'a pas besoin d'agir comme un joint d'étanchéité. Lorsque le piston effectue un mouvement de va-et-vient dans le trou, l'applicateur coulisse contre le trou et applique un matériau lubrifiant solide au trou, produisant un film lubrifiant solide sur le trou contre lequel l'élément d'étanchéité peut coulisser. L'applicateur comprend un matériau tel qu'un graphite, un polymère ou un autre lubrifiant solide approprié.

International search report:
Received at International Bureau: 29 October 2018 (29.10.2018) [EP]

International Report on Patentability (IPRP) Chapter II of the PCT:
Not available

(81) Designated States:
AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
European Patent Office (EPO) : AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR
African Intellectual Property Organization (OAPI) : BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG
African Regional Intellectual Property Organization (ARIPO) : BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW
Eurasian Patent Organization (EAPO) : AM, AZ, BY, KG, KZ, RU, TJ, TM