US3918853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid fuel pumping apparatus
Assignee: Individual
•
Filing: 1974-05-22
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Granted: 1975-11-11
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Expires: 1994-05-22
Abstract
Abstract A liquid fuel pumping apparatus for supplying fuel to an internal combustion engine includes an injection pump which delivers fuel past a delivery valve. The delivery valve includes an axially movable valve element which is biased by a spring to the closed position, and is movable to the open position by fuel delivered by the injection pump. A restricted passage is provided in the valve element and which allows an additional flow of fuel between the injection pump and an outlet during the delivery stroke of the pump. The flow of fuel through the restricted passage is controlled by a valve member.
Inventors
- 👤 Moshe Drori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:40
CPC Classifications
F; F02; F02M; F02M59/00; F02M59/44; F02M59/46; F02M59/462; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85978; Y10T137/86115
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
226 words
A liquid fuel pumping apparatus for supplying fuel to an internal combustion engine comprising in combination, an injection pump, a body part, a distributor member rotatable in the body part, the injection pump and distributor member being adapted to be driven in time relationship with an associated engine, the distributor member including a passage communicating with the injection pump, the body part having outlet ports formed therein and said passage registering in turn during successive delivery strokes of the injection pump with the outlet ports formed in the body part and which in use, communicate respectively with the injection nozzles of an associated engine, a delivery valve in said passage and containing bore means open in one position to provide communication between said pump and passage and closed by portions of the distributor member in another position, said delivery valve opening during the delivery of fuel by the injection pump, said delivery valve comprising an axially movable valve element, resilient means biasing the valve element to a position in which flow of fuel from said passage to the injection pump is prevented, restricted passage means in said valve element and communicating between the bore means and the passage and a valve member in said passage means, said valve member closing to prevent flow of fuel through said passage means from said passage to the injection pump.
Claim 2
Dependent Claim
226 words
A liquid fuel pumping apparatus for supplying fuel to an internal combustion engine comprising in combination, an injection pump, a body part, a distributor member rotatable in the body part, the injection pump and distributor member being adapted to be driven in time relationship with an associated engine, the distributor member including a passage communicating with the injection pump, the body part having outlet ports formed therein and said passage registering in turn during successive delivery strokes of the injection pump with the outlet ports formed in the body part and which in use, communicate respectively with the injection nozzles of an associated engine, a delivery valve in said passage and containing bore means open in one position to provide communication between said pump and passage and closed by portions of the distributor member in another position, said delivery valve opening during the delivery of fuel by the injection pump, said delivery valve comprising an axially movable valve element, resilient means biasing the valve element to a position in which flow of fuel from said passage to the injection pump is prevented, restricted passage means in said valve element and communicating between the bore means and the passage and a valve member in said passage means, said valve member closing to prevent flow of fuel through said passage means from said passage to the injection pump.
Claim 3
Dependent Claim
81 words
An apparatus as claimed in claim 1, in which said valve element is slidable within an enlarged portion of said passage, said passage being provided with a further enlarged portion thereby defining a step between said portions, said valve element having a peripheral groove communicating with the upstream end of the valve element and which during the delivery of fuel by the injection pump is exposed beyond said step as the valve element moves against the action of the resilient means.
Claim 4
Dependent Claim
32 words
An apparatus as claimed in claim 2 in which said restricted passage means extends from the upstream end of said valve element and opens into said further enlarged portion of the passage.
Claim 5
Dependent Claim
19 words
An apparatus as claimed in claim 3 in which said passage includes a restricted portion constituting a restricted orifice.
Claim 6
Dependent Claim
19 words
An apparatus as claimed in claim 4 in which said valve member is in the form of a ball.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |