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Machine translation
1. (WO1997012121) SUBSURFACE PNEUMATIC HAMMER
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1997/012121    International Application No.:    PCT/RU1996/000329
Publication Date: 03.04.1997 International Filing Date: 14.11.1996
IPC:
E21B 10/36 (2006.01), E21B 17/07 (2006.01)
Applicants: YALESTOWN CORPORATON N.V. [NL/NL]; de Ruyterkade 58A, Curacao (AN) (For All Designated States Except US).
GRECHUSHKIN, Boris Alexeevich [RU/RU]; (RU) (For US Only).
KADOMKIN, Viktor Viktorovich [RU/RU]; (RU) (For US Only).
KOMAROV, Vladimir Mikhailovich [RU/RU]; (RU) (For US Only).
FRENKEL, Boris Efimovich [RU/RU]; (RU) (For US Only)
Inventors: GRECHUSHKIN, Boris Alexeevich; (RU).
KADOMKIN, Viktor Viktorovich; (RU).
KOMAROV, Vladimir Mikhailovich; (RU).
FRENKEL, Boris Efimovich; (RU)
Agent: SUKHOROSOV, Sergei Jurievich; a/ya 19, Centre, Moscow, 103104 (RU)
Priority Data:
96116726 30.08.1996 RU
Title (EN) SUBSURFACE PNEUMATIC HAMMER
(FR) MARTEAU PNEUMATIQUE IMMERGE
Abstract: front page image
(EN)The proposed invention pertains to percussion tools, in particular to designs for a drill and drill bit. The proposed pneumatic hammer comprises: a housing; a piston-hammer mounted inside the housing; and a drill bit with a shaft of stepped design. The outer surface of the smaller-diameter stage is provided with longitudinal grooves and transverse grooves for lock elements, while the outer surface of the larger-diameter stage is provided with additional longitudinal grooves and a reducer comprising two sections and provided with a central aperture, lock elements and torque-transmission elements in the form of, for example, cylindrical rollers. The larger-diameter section of the reducer is connected to the larger-diameter stage of the shaft and has apertures and blind longitudinal grooves on the inner surface, cylindrical rollers being fitted in the apertures and longitudinal grooves. The proposed device reduces wear and destruction of the reducer and drill bit by reducing mechanical loads when the pneumatic hammer is in operation.
(FR)Cette invention se rapporte au domaine des outils à percussion et concerne notamment des structures d'outils et de colonnes de forage. Ce marteau pneumatique immergé comprend un corps dans lequel se trouve un piston-percuteur, ainsi qu'un trépan comportant une tige étagée. La surface externe de l'étage de moindre diamètre comporte des gorges longitudinales et transversales destinées à des éléments de verrouillage, tandis que la surface externe de l'étage de grand diamètre comporte des gorges longitudinales complémentaires et un raccord en deux parties comportant une ouverture centrale. Les éléments de verrouillage et les éléments de transmission de moment rotatif peuvent, par exemple, se présenter sous forme de rouleaux. La partie du raccord possédant le plus grand diamètre est reliée à l'étage de grand diamètre et possède, sur sa surface interne, des gorges non traversantes dans lesquelles viennent se loger les rouleaux cylindriques. Ce dispositif permet de réduire l'usure et de prévenir la rupture du raccord et du trépan, ceci grâce à un allégement des charges mécaniques qui s'exercent lors du fonctionnement du marteau pneumatique immergé.
Designated States: AL, AM, AT, AU, AZ, BB, BG, BR, BY, CA, CH, CN, CZ, DE, DK, EE, ES, FI, GB, GE, HU, IL, IS, JP, KE, KG, KP, KR, KZ, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, TJ, TM, TR, TT, UA, UG, US, UZ, VN.
African Regional Intellectual Property Organization (KE, LS, MW, SD, SZ, UG)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, NE, SN, TD, TG).
Publication Language: Russian (RU)
Filing Language: Russian (RU)