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US3668945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller tappet guard
Assignee: Robert Bosch GmbH
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Filing: 1970-03-13
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Granted: 1972-06-13
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Expires: 1990-03-13
Abstract
Abstract In a multicylinder device, such as a fuel injection pump, between two adjacent roller tappets there is fixedly held in the pump housing a securing pin which, by virtue of parts thereof cooperating with parts of said roller tappets, prevents the latter from turning and the roller pins from axially sliding.
Inventors
- 👤 Eberhard Hofmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:47
CPC Classifications
F; F02; F02M; F02M59/00; F02M59/02; F02M59/10; F02M59/102; F02M59/44; F02M59/48; F01; F01L; F01L2307/00; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101; Y10T74/2107
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
222 words
In a guard means for tappets operating in a multicylinder fuel injection pump, said tappets are of the reciprocating type that carry a roller mounted by a roller pin, said guard means is of the known type that includes a securing pin fixedly held in the housing of said multicylinder device between two adjacent tappets, said securing pin cooperates with flattened areas of said tappets to prevent rotation of the latter, the improvement comprising, two diametrically opposed planar face portions provided in said securing pin, each said planar face portion extending parallel to and cooperating with a flattened area of said two adjacent tappets, said planar face portions of said securing pin being disposed immediately adjacent a terminus of each roller pin of said two adjacent tappets, each planar face portion lying in a plane disposed parallel with the direction of reciprocation of said tappets, the dimension of each planar face portion measured parallel with said direction of reciprocation being at least as large as the amplitude of said reciprocation, each planar face portion being so disposed with respect to the adjacent reciprocating roller pin that in both extreme momentary positions of the roller pin and in any momentary positions therebetween, the axis of said roller pin passes through a point located on the adjacent planar face portion of said securing pin.
Claim 2
Dependent Claim
222 words
In a guard means for tappets operating in a multicylinder fuel injection pump, said tappets are of the reciprocating type that carry a roller mounted by a roller pin, said guard means is of the known type that includes a securing pin fixedly held in the housing of said multicylinder device between two adjacent tappets, said securing pin cooperates with flattened areas of said tappets to prevent rotation of the latter, the improvement comprising, two diametrically opposed planar face portions provided in said securing pin, each said planar face portion extending parallel to and cooperating with a flattened area of said two adjacent tappets, said planar face portions of said securing pin being disposed immediately adjacent a terminus of each roller pin of said two adjacent tappets, each planar face portion lying in a plane disposed parallel with the direction of reciprocation of said tappets, the dimension of each planar face portion measured parallel with said direction of reciprocation being at least as large as the amplitude of said reciprocation, each planar face portion being so disposed with respect to the adjacent reciprocating roller pin that in both extreme momentary positions of the roller pin and in any momentary positions therebetween, the axis of said roller pin passes through a point located on the adjacent planar face portion of said securing pin.
Claim 3
Dependent Claim
208 words
In a guard means for tappets operating in a multicylinder device, particularly a fuel injection pump, said tappets are of the reciprocating type that carry a roller mounted by a roller pin, said guard means is of the known type that includes a securing pin fixedly held in the housing of said multicylinder device between two adjacent tappets, said securing pin cooperates with flattened face portions of said tappets to prevent rotation of the latter, the improvement comprising, two diametrically opposed planar face portions provided in said securing pin, each said planar face portion extending parallel to and cooperating with a flattened face portion of said two adjacent tappets, said planar face portions of said securing pin being disposed immediately adjacent a terminus of each roller pin of said two adjacent tappets, each said roller pin remaining within the outline of said planar face portions at all times during the reciprocation of said tappets and a groove provided in each planar face portion of said securing pin, each groove extending parallel to the path of reciprocation of said tappets, each said terminus of said roller pins includes an integral lug extending into and guided in the groove of an immediately adjacent planar face portion of said securing pin.
Claim 4
Dependent Claim
208 words
In a guard means for tappets operating in a multicylinder device, particularly a fuel injection pump, said tappets are of the reciprocating type that carry a roller mounted by a roller pin, said guard means is of the known type that includes a securing pin fixedly held in the housing of said multicylinder device between two adjacent tappets, said securing pin cooperates with flattened face portions of said tappets to prevent rotation of the latter, the improvement comprising, two diametrically opposed planar face portions provided in said securing pin, each said planar face portion extending parallel to and cooperating with a flattened face portion of said two adjacent tappets, said planar face portions of said securing pin being disposed immediately adjacent a terminus of each roller pin of said two adjacent tappets, each said roller pin remaining within the outline of said planar face portions at all times during the reciprocation of said tappets and a groove provided in each planar face portion of said securing pin, each groove extending parallel to the path of reciprocation of said tappets, each said terminus of said roller pins includes an integral lug extending into and guided in the groove of an immediately adjacent planar face portion of said securing pin.
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |