119.
(11) Patent number: 2147681
(46) Date of publication: 20.04.2000
(51) Int. Cl.7: E 21 C 37/00, E 02 D 7/10
(21) Application number: 98105925/03
(22) Application date: 31.03.1998
(71) Applicant:
Konstruktorsko-tekhnologicheskij institut gidroimpul'snoj tekhniki SO RAN
(72) Inventor:
Kulagin R.A.,
Ermilov N.P.,
Kotov I.M.
(73) Proprietor:
Konstruktorsko-tekhnologicheskij institut gidroimpul'snoj tekhniki SO RAN
(98) Mail address:
630090, Novosibirsk, ul.Tereshkovoj, d.29, KTI GIT SO RAN, Cherendinoj Eh.P
(54) PERCUSSIVE DEVICE
(57)
FIELD: mining and construction; applicable in breakage of rocks, shaping of materials and performance of other jobs in construction. SUBSTANCE: percussive device includes body accommodating reciprocating striking piston forming in body of accumulating and cocking chambers. Cocking chamber is communicated with accumulation and return main line during operation stroke of striking piston. Device efficiency is increased due to reduced hydraulic resistance of fluid flowing from cocking chamber to accumulating hollow and exclusion of loss of energy carrier from accumulating chamber through striking piston-accumulator seal due to the fact than accumulator cylinder is made stepped and provided with piston and rod. Piston and cylinder form accumulating hollow communicated with return main line. EFFECT: higher efficiency. 1 dwg.
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