Patent US4876916A successfully refreshed from Google Patents.
US4876916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cast shafts, particularly camshafts
Assignee: Von Roll AG
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Filing: 1987-12-09
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Granted: 1989-10-31
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Expires: 2007-12-09
Abstract
Abstract An elongated generally cylindrical iron shaft is cast as a single piece. The shaft has a longitudinal axis and has a centrally disposed longitudinal hollow channel extending completely therethrough along the axis. The shaft has a plurality of transverse channels extending outwardly from the longitudinal channel completely through the shaft to the outside thereof and communicating with the longitudinal channel. Each transverse channel has the shape of a nozzle. The outside openings of the transverse channels are spaced apart and are disposed along a helical path on the outer surface of the shaft. The helix has an axis coincident with the longitudinal axis.
Inventors
- 👤 Konrad Maier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:16
CPC Classifications
F; F16; F16C; F16C3/00; F16C3/04; F16C3/18; F16C3/02; F01; F01L; F01L1/00; F01L1/02; F01L1/04; F01L1/047; F01M; F01M13/00; F01M13/04; F01M2013/0422; F16C2360/00; F16C2360/18; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2101
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
122 words
An elongated generally cylindrical iron shaft having a longitudinal axis and a centrally disposed longitudinal channel extending completely therethrough along the axis, the shaft further having a plurality of transverse channels extending outwardly from the longitudinal channel completely through the shaft to the outside thereof and communicating with the longitudinal channel, each transverse channel having the shape of a nozzle and being wider at said longitudinal channel than at outside openings thereof, the outside openings of the transverse channels being spaced apart and disposed along a helical path on an outer surface of the shaft, the helix having an axis coincident with the longitudinal axis, said shaft together with said longitudinal channel and said transverse channels being cast as a single piece.
Claim 2
Dependent Claim
122 words
An elongated generally cylindrical iron shaft having a longitudinal axis and a centrally disposed longitudinal channel extending completely therethrough along the axis, the shaft further having a plurality of transverse channels extending outwardly from the longitudinal channel completely through the shaft to the outside thereof and communicating with the longitudinal channel, each transverse channel having the shape of a nozzle and being wider at said longitudinal channel than at outside openings thereof, the outside openings of the transverse channels being spaced apart and disposed along a helical path on an outer surface of the shaft, the helix having an axis coincident with the longitudinal axis, said shaft together with said longitudinal channel and said transverse channels being cast as a single piece.
Claim 3
Dependent Claim
14 words
The shaft of claim 1 wherein the openings have a substantially circular cross-sectional shape.
Claim 4
Dependent Claim
36 words
The shaft of claim 1 wherein the openings have an oval cross-sectional shape with transversely disposed relatively short and relatively long axes, the long axes extending in a direction at right angles to the longitudinal axis.
Claim 5
Dependent Claim
43 words
The shaft of claim 1 wherein all of the openings have like cross-sectional areas, the cross-sectional area of the longitudinal channel being N times as large as the cross-sectional area of a transverse channel opening, where N is an integer larger than 1.
Claim 6
Dependent Claim
27 words
The shaft of claim 4 wherein the cross-sectional area of the longitudinal channel is larger than the sum of the cross-sectional areas of all of the openings.
Claim 7
Dependent Claim
23 words
The shaft of claim 1 wherein each transverse channel is are disposed in a longitudinal plane in which the longitudinal axis is disposed.
Claim 8
Dependent Claim
19 words
The shaft of claim 1 which is a cam shaft, the openings being coincident with a circumferential cam surface.
Claim 9
Dependent Claim
36 words
The shaft of claim 1 wherein at least one end face of the shaft has a cast connection which at least partially covers the longitudinal channel and wherein a web is centrally disposed in the connection.
Claim 10
Dependent Claim
36 words
The shaft of claim 1 having the following chemical composition as expressed in percent by weight: carbon, 2.8-2.4%,; silicon, 2.0-2.8%; manganese, a maximum of 0.15%; tin, 0.1-0.5%; phosphorous, a maximum of 0.06%; magnesium, 0.035-0.06%; balance, iron.
Claim 11
Dependent Claim
13 words
The shaft of claim 9 having pearlitic-sorbitic structure with a precise spheroidal form.
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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) | 1992-10-30 | 1993-05-01 | 1993-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-30 | 1997-05-01 | 1997-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-30 | 2001-05-01 | 2001-10-31 | $7700.00 | Window Closed / Lapsed |