US3708023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-propelled air-punching mechanism
Assignee: Institute of Mining
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Filing: 1970-12-30
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Granted: 1973-01-02
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Expires: 1990-12-30
Abstract
Abstract A self-propelled air-punching mechanism for making holes in soil by its compaction, in which a hollow body is provided with a pointed head section with a striker being located within the body and forming therewith front and rear pressure chambers, and the front chamber communicating with an additional space within the pointed head section of the body, thus raising the impact power of the mechanism.
Inventors
- 👤 N Nazarov
- 👤 N Chinakal
- 👤 B Sudnishnikov
- 👤 K Tupitsyn
- 👤 A Kostylev
- 👤 K Gurkov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:34
CPC Classifications
E; E21; E21B; E21B4/00; E21B4/06; E21B4/14; E21B4/145; F; F01; F01B; F01B11/00; F01B11/04; F01L; F01L21/00; F01L21/02; F03; F03C; F03C1/00; F03C1/02; F03C1/03; F03C1/035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A self-propelled air punching mechanism to make holes in soil by its compaction, comprising: a hollow cylindrical body having a pointed head section, said head section having an inner space and passages, a striker located within said body and defining with the inner surface of the body a front chamber of variable volume, said front chamber communicating periodically with a compressed air source and atmosphere, said striker haVing a tail section having openings in the side wall and a cavity, an air-passing sleeve slidably mounted in the cavity, said sleeve and cavity defining a rear chamber of variable volume which is permanently connected to a compressed air source and which, upon interaction with said striker, supplies air into said chambers and into the inner space and passages in the pointed head section of the body, as a result of which the striker moves reciprocally and imparts impacts to said body.
Claim 2
Dependent Claim
150 words
A self-propelled air punching mechanism to make holes in soil by its compaction, comprising: a hollow cylindrical body having a pointed head section, said head section having an inner space and passages, a striker located within said body and defining with the inner surface of the body a front chamber of variable volume, said front chamber communicating periodically with a compressed air source and atmosphere, said striker haVing a tail section having openings in the side wall and a cavity, an air-passing sleeve slidably mounted in the cavity, said sleeve and cavity defining a rear chamber of variable volume which is permanently connected to a compressed air source and which, upon interaction with said striker, supplies air into said chambers and into the inner space and passages in the pointed head section of the body, as a result of which the striker moves reciprocally and imparts impacts to said body.
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) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |