Patent US3616865A successfully refreshed from Google Patents.
US3616865A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic percussion device for making holes in the ground by packing the latter
Assignee: INSTITUT GORNOGO DELA SIBIRSKOGO OTDELENIA AKADEMII USSR NOVOSIBIRSK KRASNY PROSPEKT 54
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Filing: 1970-02-19
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Granted: 1971-11-02
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Expires: 1990-02-19
Abstract
Abstract The invention consists in a pneumatic percussion device for making holes in the ground by packing the latter, comprising a striker accommodated in a tapered housing and adapted to deliver impacts upon the housing in the course of its reciprocation under the effect of compressed air intermittently supplied to working chambers of the device by a distributing mechanism formed by an air-supply pipe secured in the shank portion of the housing, on which pipe there is set a movable sleeve adapted to overlap one of the inlet apertures of the pipe, and openings in the shank portion of the striker, said openings being overlapped by the pipe during the striker movement.
Inventors
- 👤 Boris Vasilievich Sudnishnikov
- 👤 Alexandr Dmitrievich Kostylev
- 👤 Konstantin Stepanovich Gurkov
- 👤 Konstantin Konstantin Tupitsyn
- 👤 Vladimir Vasilievich Klimashko
- 👤 Nikolai Prokhorovich Chepurnoi
- 👤 Vladimir Maximovich Terin
- 👤 Vladimir Dmitrievich Plavskikh
- 👤 Nikolai Grigorievich Nazarov
- 👤 Leonid Georgievich Rozhkov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:51
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/06; E21B4/14; E21B4/145
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
162 words
A pneumatic percussion device for making holes in the ground by packing the latter, comprising: a cylindrical housing pointed in its front portion; a striker having openings and a space in the shank portion, said striker dividing the inside of said housing into front and rear working chambers and adapted to deliver impacts upon said housing in the course of its reciprocation under the effect of compressed air; a pipe for the delivery of compressed air to said chambers, secured in the shank portion of said housing and overlapping the openings of the striker when the latter advances with its space upon said pipe; a sleeve mounted on the pipe and connected with the striker and movable with respect to the latter and the pipe; said pipe having in its sidewall an aperture communicating the air conduit of the pipe with the rear working chamber and adapted to be overlapped by said sleeve during the striker stroke towards the front working chamber.
Claim 2
Dependent Claim
162 words
A pneumatic percussion device for making holes in the ground by packing the latter, comprising: a cylindrical housing pointed in its front portion; a striker having openings and a space in the shank portion, said striker dividing the inside of said housing into front and rear working chambers and adapted to deliver impacts upon said housing in the course of its reciprocation under the effect of compressed air; a pipe for the delivery of compressed air to said chambers, secured in the shank portion of said housing and overlapping the openings of the striker when the latter advances with its space upon said pipe; a sleeve mounted on the pipe and connected with the striker and movable with respect to the latter and the pipe; said pipe having in its sidewall an aperture communicating the air conduit of the pipe with the rear working chamber and adapted to be overlapped by said sleeve during the striker stroke towards the front working chamber.
Claim 3
Dependent Claim
30 words
A pneumatic percussion device according to claim 1, wherein the sleeve has two outer ribs spaced from each other, between which ribs is arranged a pin secured to the striker.
Claim 4
Dependent Claim
44 words
A pneumatic percussion device according to claim 1, wherein the air-supply pipe is provided with a channel designed for the removal of exhausted air to the atmosphere and alternately communicating, during the striker movement, with the front and rear chambers via an exhaust hole.
Claim 5
Dependent Claim
40 words
A pneumatic percussion device according to claim 1, in whose housing provision is made of an opening designed for the discharge of exhausted air to the atmosphere and alternately communicating, during the striker movement, with the front and rear chambers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |