US3679005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diesel hammer
Assignee: IHI Corp
•
Filing: 1970-10-19
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Granted: 1972-07-25
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Expires: 1990-10-19
Abstract
Abstract The present invention provides a diesel hammer having as major structural parts a cylinder whose upper end is opened, a ram slidably fitted into said cylinder, an anvil fitted into the lower end of said cylinder, and a fuel tank, a fuel pump and nozzles mounted upon the outer surface of said cylinder. A port is formed through said cylinder so as to deliver the air under pressure from the cylinder to said fuel pump and to deliver the fuel in said fuel tank to said nozzles.
Inventors
- 👤 Kohsaku Inaba
- 👤 Seisaku Yoshida
- 👤 Shoji Matsuura
- 👤 Tsukasa Murakami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:43
CPC Classifications
E; E02; E02D; E02D7/00; E02D7/02; E02D7/06; E02D7/12; E02D7/125; B; B21; B21J; B21J7/00; B21J7/20; B21J7/22; B21J7/24; B21J7/26; F; F02; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
114 words
A diesel hammer comprising an anvil which is fitted into the lower end of a cylinder having an open upper end while a ram is slidably fitted into the upper portion of said cylinder, thereby defIning a combustion chamber circular in cross section by said ram, said anvil and said cylinder; upon said cylinder are mounted a fuel tank and a fuel pump actuable by the air compressed when said ram drops in said cylinder; nozzles are arranged so as to spray the fuel into said combustion chamber; and the fuel delivered from said fuel tank is forced toward said nozzles by said fuel pump actuable by the air compressed when said ram drops.
Claim 2
Dependent Claim
114 words
A diesel hammer comprising an anvil which is fitted into the lower end of a cylinder having an open upper end while a ram is slidably fitted into the upper portion of said cylinder, thereby defIning a combustion chamber circular in cross section by said ram, said anvil and said cylinder; upon said cylinder are mounted a fuel tank and a fuel pump actuable by the air compressed when said ram drops in said cylinder; nozzles are arranged so as to spray the fuel into said combustion chamber; and the fuel delivered from said fuel tank is forced toward said nozzles by said fuel pump actuable by the air compressed when said ram drops.
Claim 3
Dependent Claim
39 words
A diesel hammer of the character described in claim 1 comprising the provision of means for making the fuel injection timing almost coincident with the time the lower end of the ram strikes the upper end of the anvil.
Claim 4
Dependent Claim
78 words
A diesel hammer of the character described in claim 1 wherein two fuel injection nozzles are disposed in a diametrically opposed relation with each other so as to spray the fuel into said combustion chamber from the opposed positions; the fuel delivered from said fuel pump is branched and delivered to said two nozzles; and the fuel is sprayed at a predetermined angle relative to the line connecting said two injection nozzles and the center of said cylinder.
Claim 5
Dependent Claim
185 words
A diesel hammer of the character described in claim 1 wherein said fuel pump comprises a piston actuable by the air, a push rod, a stopper for controlling the movement of said piston and also serving as a guide for said push rod, a plunger, etc., whereby said plunger is pushed upwardly by the upward movement of said push rod caused by the movement of said piston so as to deliver the fuel; each of said nozzles has a needle valve which closes the fuel injection passage under the force of the spring and is opened by the fuel delivered; an air port is formed through said cylinder in order to deliver the compressed air from said combustion chamber to said fuel pump so as to actuate the same; and when said fuel pump is actuated by the air under pressure from said cylinder, the fuel delivered from said fuel tank is delivered to said nozzles by said fuel pump in such a manner that a substantial portion of the fuel may be sprayed into said combustion chamber immediately after said ram strikes said anvil.
Claim 6
Dependent Claim
118 words
A diesel hammer of the character described in claim 1 wherein between said fuel pump and said nozzles is disposed a stop valve which has a port for delivering fuel from said fuel pump to one of the oil chambers and a port for delivering the fuel from said one oil chamber to said nozzles and a spool fitted into said oil chambers so as to interrupt the intercommunication between said two ports; a lever is suitably provided so as to insert said spool of said stop valve from the side of the port in communication with said fuel pump, thereby interrupting the intercommunication between said two ports; and means for returning said lever to its initial position.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |