Patent DE698742C successfully refreshed from Google Patents.
Patent US3802808A successfully refreshed from Google Patents.
US3802808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid fuel injection pumping apparatus
Assignee: CAV Ltd
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Filing: 1972-07-31
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Granted: 1974-04-09
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Expires: 1992-07-31
Abstract
Abstract A fuel pumping apparatus for supplying fuel to an internal combustion engine includes a distributor member having a longitudinal bore through which fuel flows to an outlet of the pump. There is also provided a shuttle accommodated in a bore to one end of which fuel is supplied during the initial portion of the injection period and from the other end of which escapes fuel to a low pressure source. The process is reversed on the next injection stroke and the permitted movement of the shuttle is determined by an adjustable stop.
Inventors
- 👤 K Kemp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:08
CPC Classifications
F; F02; F02M; F02M41/00; F02M41/08; F02M41/14; F02M41/1405
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
355 words
A liquid fuel injection pumping apparatus for supplying fuel to an internal combustion engine comprising in combination, a pump body, an injection pump located within the body, a distributor member rotatably mounted in the body, the injection pump and distributor member being driven in timed relationship with the associated engine, a passage formed in the distributor member and communicating with the injection pump, a plurality of outlet ports formed in the body, said passage registering in turn with said outlet ports during successive delivery strokes of the injection pump, the outlet ports in use, communicating respectively with the injection nozzles of the associated engine, means for supplying fuel to the injection pump during the filling strokes of the injection pump, a bore formed in the pump body, a shuttle slidable within said bore, a pair of further passages communicating with the opposite ends of said bore, said further passages opening onto the distributor member at angularly spaced points, first groove means on the distributor member communicating with said passage whereby said further passages in turn are placed in communication with said passage during successive delivery strokes of the injection pump, second groove means on the distributor member, said second groove means communicating with a source of fuel at low pressure, said second groove means registering with said further passages in turn during successive delivery strokes of the injection pump and means for controlling the extent of movement of the shuttle, the arrangement being such that during one delivery stroke said passage is in communication with one end of said bore through one of the further passages and the first groove means so that at the start of the delivery stroke the shuttle is moved away from said one end of the bore, fuel being allowed to escape from the other end of the bore through the other of said further passages and the second groove means, and at the next delivery stroke the passage communicates with the other end of the bore so that the shuttle is moved in the opposite direction and fuel escapes from said one end of the bore to said source.
Claim 2
Dependent Claim
355 words
A liquid fuel injection pumping apparatus for supplying fuel to an internal combustion engine comprising in combination, a pump body, an injection pump located within the body, a distributor member rotatably mounted in the body, the injection pump and distributor member being driven in timed relationship with the associated engine, a passage formed in the distributor member and communicating with the injection pump, a plurality of outlet ports formed in the body, said passage registering in turn with said outlet ports during successive delivery strokes of the injection pump, the outlet ports in use, communicating respectively with the injection nozzles of the associated engine, means for supplying fuel to the injection pump during the filling strokes of the injection pump, a bore formed in the pump body, a shuttle slidable within said bore, a pair of further passages communicating with the opposite ends of said bore, said further passages opening onto the distributor member at angularly spaced points, first groove means on the distributor member communicating with said passage whereby said further passages in turn are placed in communication with said passage during successive delivery strokes of the injection pump, second groove means on the distributor member, said second groove means communicating with a source of fuel at low pressure, said second groove means registering with said further passages in turn during successive delivery strokes of the injection pump and means for controlling the extent of movement of the shuttle, the arrangement being such that during one delivery stroke said passage is in communication with one end of said bore through one of the further passages and the first groove means so that at the start of the delivery stroke the shuttle is moved away from said one end of the bore, fuel being allowed to escape from the other end of the bore through the other of said further passages and the second groove means, and at the next delivery stroke the passage communicates with the other end of the bore so that the shuttle is moved in the opposite direction and fuel escapes from said one end of the bore to said source.
Claim 3
Dependent Claim
32 words
An apparatus as claimed in claim 1 in which said means comprises a fixed stop at one end of the bore and an adjustable stop at the other end of the bore.
Claim 4
Dependent Claim
27 words
An apparatus as claimed in claim 1 in which the axis of the bore extends at right angles to the axis of rotation of the distributor member.
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) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |