US4909220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection
Assignee: Motors Liquidation Co
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Filing: 1987-08-03
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Granted: 1990-03-20
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Expires: 2007-08-03
Abstract
Abstract The base of a fuel injector has a plurality of radially opening recesses that receive the ends of injection tubes, the end of each tube is flared and surrounded by an O-ring that seals the tube in its recess, each tube is surrounded by a sleeve that supports the tube in its recess, and a retainer clip is secured over the injector base and has spring fingers that embrace the tubes and bias the sleeves to retain the ends of the tubes in their recesses.
Inventors
- 👤 Martin J. Field
- 👤 Jeffrey S. Calhoun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:06
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/46; F02M69/08; F02M69/50; F16; F16L; F16L37/00; F16L37/008
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
140 words
A fuel injector having a base with plurality of radially directed feed passages that open to a plurality of radially directed recesses each receiving the end of an injection tube, the end of each tube being flared and engaging a shoulder at the intersection of its recess and its feed passage, an O-ring surrounding each tube and sealing the tube in its recess, a sleeve surrounding each tube and supporting the tube in its recess, and a retainer clip secured to the base, said clip including flexible spring fingers that embrace the tubes and bias the sleeves to retain the ends of the tubes in their recesses, the ends of the spring fingers being curled to lead over the ends of the sleeves, and the ends of the sleeves being rounded to assist in holding the clip on the base.
Claim 2
Dependent Claim
140 words
A fuel injector having a base with plurality of radially directed feed passages that open to a plurality of radially directed recesses each receiving the end of an injection tube, the end of each tube being flared and engaging a shoulder at the intersection of its recess and its feed passage, an O-ring surrounding each tube and sealing the tube in its recess, a sleeve surrounding each tube and supporting the tube in its recess, and a retainer clip secured to the base, said clip including flexible spring fingers that embrace the tubes and bias the sleeves to retain the ends of the tubes in their recesses, the ends of the spring fingers being curled to lead over the ends of the sleeves, and the ends of the sleeves being rounded to assist in holding the clip on the base.
Claim 3
Dependent Claim
94 words
A fuel injector having a plurality of radially directed recesses each receiving the end of an injection tube, wherein the end of each tube is flared, an O-ring surrounds each tube to seal the tube in its recess, a sleeve surrounds each tube to support the tube in its recess, and a single retainer clip is secured to the injector base and has spring fingers that embrace each of the tubes and bias each of the sleeves to retain the ends of each of the tubes in their radially directed recesses in the injector.
Claim 4
Dependent Claim
94 words
A fuel injector having a plurality of radially directed recesses each receiving the end of an injection tube, wherein the end of each tube is flared, an O-ring surrounds each tube to seal the tube in its recess, a sleeve surrounds each tube to support the tube in its recess, and a single retainer clip is secured to the injector base and has spring fingers that embrace each of the tubes and bias each of the sleeves to retain the ends of each of the tubes in their radially directed recesses in the injector.
Claim 5
Dependent Claim
116 words
A fuel injector having a plurality of radially directed feed passages that open to a plurality of radially directed recesses each receiving the end of an injector tube, wherein the end of each tube is flared and engages a shoulder at the intersection of its recess and its feed passage, an O-ring surrounds each tube to seal the tube in its recess, a sleeve surrounds each tube to support the tube in its recess, and a single retainer clip is secured to the injector base and has spring fingers that embrace each of the tubes and bias each of the sleeves to retain the ends of each of the tubes in their recesses in the injector.
Claim 6
Dependent Claim
116 words
A fuel injector having a plurality of radially directed feed passages that open to a plurality of radially directed recesses each receiving the end of an injector tube, wherein the end of each tube is flared and engages a shoulder at the intersection of its recess and its feed passage, an O-ring surrounds each tube to seal the tube in its recess, a sleeve surrounds each tube to support the tube in its recess, and a single retainer clip is secured to the injector base and has spring fingers that embrace each of the tubes and bias each of the sleeves to retain the ends of each of the tubes in their recesses in the injector.
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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) | 1993-03-19 | 1993-09-18 | 1994-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-19 | 1997-09-18 | 1998-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-19 | 2001-09-18 | 2002-03-20 | $7700.00 | Window Closed / Lapsed |