PNEUMATIC PERCUSSION MACHINE - VNII PK I MEK STROIT MONTAZH I

Title:

PNEUMATIC PERCUSSION MACHINE

Document Type and Number:

WIPO Patent Application WO/1981/001590

Kind Code:

A1

Abstract:

A pneumatic percussion machine comprises a casing (1) provided with a grip (2), a barrel (3) with a feeder (10) fixed to it and with a striker placed inside it, the barrel being movably mounted inside the casing in guides (4), and a packing unit of the feeder (10). The packing unit of the feeder (10) comprises a lentil-shaped disk (11) and a packing element (12), the lentil-shaped disk resting by its spherical surface on the butt-end (5) of the casing (1) provided with a corresponding spherical surface (15). The packing element (12) is placed between the lentil-shaped disk (11) and the butt-end of the grip (2). The lentil-shaped disk (11) is provided with a central opening (13) through which passes the feeder (10). Such a construction of the packing unit of the feeder allows to exclude the possibility of seizure of the feeder in the opening of the disk and of the barrel in the casing in case of eventual misalignement between the feeder and the central opening of the disk.

More Like This:

WO/1988/003855

SINGLE-STROKE PERCUSSION DEVICE

Inventors:

NIKOLAEV I (SU)
DRONOVA L (SU)
EVPOLOV V (SU)
LEDNIKOV A (SU)

Application Number:

PCT/SU1979/000124

Publication Date:

June 11, 1981

Filing Date:

November 30, 1979

Export Citation:

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Assignee:

VNII PK I MEK STROIT MONTAZH I (SU)
NIKOLAEV I (SU)
DRONOVA L (SU)
EVPOLOV V (SU)
LEDNIKOV A (SU)

International Classes:

B25D9/00; B25D9/14; E21B1/00; E21B1/30; (IPC1-7): E21C3/24

Foreign References:

SU381743A1	1977-11-25
US3456742A	1969-07-22
US3559753A	1971-02-02

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