US3635403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection device
Assignee: LOrange GmbH
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Filing: 1969-10-10
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Granted: 1972-01-18
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Expires: 1989-10-10
Abstract
Abstract A fuel injection device, especially for diesel engines, in which the fuel injection plunger is reciprocable in a guiding body one end portion of which forms a spring chamber for the spring which controls the valve member in the nozzle body which latter is connected to that end portion of the guiding body which forms said spring chamber.
Inventors
- 👤 Wilfried Hofken
- 👤 Walter Eckstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:59
CPC Classifications
F; F02; F02M; F02M57/00; F02M57/02; F02M57/022; F02M57/023; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
254 words
A fuel injection device, especially for fuel pump equipped diesel engines, which includes: housing means having first conduit means therein for connection with a source of fuel, a guiding body arranged within said housing means and provided with second conduit means for connection with said first conduit means, said second conduit means leading to one end face of said guiding body, control plunger means reciprocable in said guiding body and operable tO control communication between said first and second conduit means and to exert pressure on fuel in said second conduit means, said guiding body also having recess means at said one end face thereof, unitary nozzle head means connected to said guiding body directly against the end face thereof and provided with a nozzle opening and with third conduit means communicating with said second conduit means and leading to said nozzle opening, control valve means reciprocable in said unitary nozzle head means which is an integral piece from the high-pressure side of the pump to the end face and adapted for controlling fluid communication between said third conduit means and said nozzle opening, and spring means within said recess means and normally causing said control valve means to close said nozzle opening to thereby interrupt fluid communication between said third conduit means and said nozzle opening, said control valve means being operable in response to a fluid pressure exceeding the thrust of said spring means to relieve said nozzle opening to thereby establish communication between said third conduit means and said nozzle opening.
Claim 2
Dependent Claim
254 words
A fuel injection device, especially for fuel pump equipped diesel engines, which includes: housing means having first conduit means therein for connection with a source of fuel, a guiding body arranged within said housing means and provided with second conduit means for connection with said first conduit means, said second conduit means leading to one end face of said guiding body, control plunger means reciprocable in said guiding body and operable tO control communication between said first and second conduit means and to exert pressure on fuel in said second conduit means, said guiding body also having recess means at said one end face thereof, unitary nozzle head means connected to said guiding body directly against the end face thereof and provided with a nozzle opening and with third conduit means communicating with said second conduit means and leading to said nozzle opening, control valve means reciprocable in said unitary nozzle head means which is an integral piece from the high-pressure side of the pump to the end face and adapted for controlling fluid communication between said third conduit means and said nozzle opening, and spring means within said recess means and normally causing said control valve means to close said nozzle opening to thereby interrupt fluid communication between said third conduit means and said nozzle opening, said control valve means being operable in response to a fluid pressure exceeding the thrust of said spring means to relieve said nozzle opening to thereby establish communication between said third conduit means and said nozzle opening.
Claim 3
Dependent Claim
17 words
A device according to claim 1, in which said recess means is formed by a blind bore.
Claim 4
Dependent Claim
26 words
A device according to claim 1, in which the axis of said recess means is substantially an extension of the axis of said control plunger means.
Claim 5
Dependent Claim
26 words
A device according to claim 1, in which said guiding body comprises a blind bore having said control plunger means reciprocable therein and guiding the same.
Claim 6
Dependent Claim
26 words
A device according to claim 4, in which said blind bore for said control plunger means ends in a chamber communicating with said second conduit means.
Claim 7
Dependent Claim
41 words
A device according to claim 1, in which said second conduit means from the recess means for the plunger means in said guiding body extend to open into the engagement end face of said guiding body for said nozzle head means.
Claim 8
Dependent Claim
45 words
A device according to claim 1, in which a box nut secures said nozzle head means to said guiding body, whereby thread means of said guiding body for said box nut are provided preferably directly adjoining the engagement end surface for said nozzle head means.
Claim 9
Dependent Claim
248 words
A fuel injection device, especially for fuel pump equipped diesel engines, which includes: housing means having first conduit means therein for connection with a source of fuel, a guiding body arranged within said housing means and provided with second conduit means for connection with said first conduit means, said second conduit means leading to one end face of said guiding body, control plunger means reciprocable in said guiding body and operable to control communication between said first and second conduit means and to exert pressure on fuel in said second conduit means, said guiding body also having recess means at said one end face thereof, nozzle head means connected to said guiding body and provided with a nozzle opening and with third conduit means communicating with said second conduit means and leading to said nozzle opening, control valve means reciprocable in said nozzle head means for controlling fluid communication between said third conduit means and said nozzle opening, and spring means within said recess means and normally causing said control valve means to close said nozzle opening to thereby interrupt fluid communication between said third conduit means and said nozzle opening, said control valve means being operable in response to a fluid pressure exceeding the thrust of said spring means to relieve said nozzle opening to thereby establish communication between said third conduit means and said nozzle opening, said venting means being connectable to the suction side of a fuel pump for connection with said fuel injection device.
Claim 10
Dependent Claim
248 words
A fuel injection device, especially for fuel pump equipped diesel engines, which includes: housing means having first conduit means therein for connection with a source of fuel, a guiding body arranged within said housing means and provided with second conduit means for connection with said first conduit means, said second conduit means leading to one end face of said guiding body, control plunger means reciprocable in said guiding body and operable to control communication between said first and second conduit means and to exert pressure on fuel in said second conduit means, said guiding body also having recess means at said one end face thereof, nozzle head means connected to said guiding body and provided with a nozzle opening and with third conduit means communicating with said second conduit means and leading to said nozzle opening, control valve means reciprocable in said nozzle head means for controlling fluid communication between said third conduit means and said nozzle opening, and spring means within said recess means and normally causing said control valve means to close said nozzle opening to thereby interrupt fluid communication between said third conduit means and said nozzle opening, said control valve means being operable in response to a fluid pressure exceeding the thrust of said spring means to relieve said nozzle opening to thereby establish communication between said third conduit means and said nozzle opening, said venting means being connectable to the suction side of a fuel pump for connection with said fuel injection device.
Claim 11
Dependent Claim
19 words
A device according to claim 8, which includes nut means connecting said nozzle body means to said guiding body.
Claim 12
Dependent Claim
48 words
A device according to claim 8, which includes abutment means arranged in said recess means for limiting the nozzLe opening relieving stroke of said control valve means, said abutment means including a shank having said spring means in the form of a coil spring extending around said shank.
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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |