US3722801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injector
Assignee: Stanadyne LLC
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Filing: 1970-09-11
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Granted: 1973-03-27
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Expires: 1990-09-11
Abstract
Abstract An inwardly opening pressure actuated liquid fuel injector is provided with a valve mounted in an apertured valve guide for reciprocation. The bearing portion of the valve is provided with a pair of longitudinally spaced V-shaped peripheral grooves which are closed by the mating bearing surface of the aperture of the guide and serve to hydraulically center the valve in the aperture and minimize mechanical friction during reciprocation.
Inventors
- 👤 M Chapuis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:14
CPC Classifications
F; F02; F02M; F02M61/00; F02M61/04; F02M61/10; F02M61/12; F02B; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7835
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
169 words
A liquid fuel injector for injecting into the combustion chamber of an associated engine pulsed charges of liquid fuel received from a high pressure fuel source comprising a tubular body having a bore provided with a valve seat and a discharge tip at one end thereof, a pressure-operated inwardly opening valve disposed in said bore, biasing means for biasing said valve toward said valve seat, an apertured valve guide closing the end of said bore remote from said valve seat, said valve having a bearing portion positioned in the aperture of said valve guide to mount said valve for high speed reciprocating movement towArd and away from the valve seat, during each injection period of the valve, and means comprising longitudinally spaced peripheral grooves on said bearing portion of said valve, said grooves being V-shaped in axial cross section to wedge said valve bearing portion to a center position during such high speed reciprocating movement thereby to overcome lateral forces which may cause binding or seizing of the valve.
Claim 2
Dependent Claim
169 words
A liquid fuel injector for injecting into the combustion chamber of an associated engine pulsed charges of liquid fuel received from a high pressure fuel source comprising a tubular body having a bore provided with a valve seat and a discharge tip at one end thereof, a pressure-operated inwardly opening valve disposed in said bore, biasing means for biasing said valve toward said valve seat, an apertured valve guide closing the end of said bore remote from said valve seat, said valve having a bearing portion positioned in the aperture of said valve guide to mount said valve for high speed reciprocating movement towArd and away from the valve seat, during each injection period of the valve, and means comprising longitudinally spaced peripheral grooves on said bearing portion of said valve, said grooves being V-shaped in axial cross section to wedge said valve bearing portion to a center position during such high speed reciprocating movement thereby to overcome lateral forces which may cause binding or seizing of the valve.
Claim 3
Dependent Claim
20 words
The injector of claim 1 wherein the included angle of said V-shaped grooves is of the order of 60* .
Claim 4
Dependent Claim
17 words
The injector of claim 2 in which said grooves are of the order of 10 mils deep.
Claim 5
Dependent Claim
17 words
The injector of claim 1 wherein a groove is disposed adjacent each end of the valve guide.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |