Patent EP0118360A1 successfully refreshed from Google Patents.
EP0118360A1
Expired / Lapsed
EP
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Boat-type rocker arm assembly
Assignee: Toledo Stamping and Manufacturing Co
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Filing: 1984-02-29
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Granted: —
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Expires: 2004-02-29
Abstract
Abstract A low-friction, boat-type rocker arm assembly is provided. The boat-type rocker arm is designed to roll on a fulcrum of a supporting pedestal during operation, rather than slipping or sliding thereon. The rocker arm has a recessed intermediate area of predetermined radius which is greater than the radius of the pedestal. The rocker has a rectangular opening (32) in the recessed portion with opposite, transverse edges (36) tapering downwardly and inwardly which fit closely with the pedestal (14) to limit travel of the rocker arm relative to the pedestal. The pedestal also has rounded surfaces at those portions positioned near the tapered edges of the rocker arm opening.
Inventors
- 👤 Ramanlal Laxmichand Patel
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 22:07
CPC Classifications
F; F01; F01L; F01L1/00; F01L1/12; F01L1/18; F01L1/181; F01L1/182; F01L1/183
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
156 words
A boat-type rocker arm assembly comprising a pedestal having a fulcrum and a shank, said fulcrum extending outwardly beyond opposite sides of said shank, said fulcrum having curved lower surfaces of a predetermined radius, a boat-type rocker arm having a recessed intermediate area with a radius greater than the radius of said fulcrum, whereby said fulcrum engages said intermediate area on substantially line contact, said rocker arm having a rectangular opening centrally located in the intermediate area through which said shank of said pedestal extends, said rectangular opening having transverse edges tapering downwardly and inwardly, said pedestal having opposite curved areas at the portion thereof extending through said rectangular opening, the dimension between said opposite curved areas of said pedestal being slightly less than the corresponding dimension across said opening between said transverse edges, whereby the cooperation of said rectangular opening and said pedestal substantially prevents longitudinal movement of said rocking arm relative to said pedestal.
Claim 2
Dependent Claim
156 words
A boat-type rocker arm assembly comprising a pedestal having a fulcrum and a shank, said fulcrum extending outwardly beyond opposite sides of said shank, said fulcrum having curved lower surfaces of a predetermined radius, a boat-type rocker arm having a recessed intermediate area with a radius greater than the radius of said fulcrum, whereby said fulcrum engages said intermediate area on substantially line contact, said rocker arm having a rectangular opening centrally located in the intermediate area through which said shank of said pedestal extends, said rectangular opening having transverse edges tapering downwardly and inwardly, said pedestal having opposite curved areas at the portion thereof extending through said rectangular opening, the dimension between said opposite curved areas of said pedestal being slightly less than the corresponding dimension across said opening between said transverse edges, whereby the cooperation of said rectangular opening and said pedestal substantially prevents longitudinal movement of said rocking arm relative to said pedestal.
Claim 3
Dependent Claim
37 words
A boat-type rocker arm assembly according to claim 1 characterized by the included angle between said tapered edges and the axis of said pedestal, when said arm is in a middle position, being from 3° to 15°.
Claim 4
Dependent Claim
37 words
A boat-type rocker arm assembly according to claim 1 characterized by the included angle between said tapered edges and the axis of said pedestal, when said arm is in a middle position, being from 4° to 8°.
Claim 5
Dependent Claim
29 words
A boat-type rocker arm assembly according to claim 1 characterized by the radius of said fulcrum being from 15% to 35% less than the radius of said intermediate surface.
Claim 6
Dependent Claim
21 words
A boat-type rocker arm assembly according to claim 1 characterized by the radius of said intermediate surface being less than infinite.
Claim 7
Dependent Claim
27 words
A boat-type rocker arm assembly according to claim 1 characterized by said transverse edges of said rectangular opening being shorter than longitudinal edges of said rectangular opening.
Claim 8
Dependent Claim
37 words
A boat-type rocker arm assembly according to claim 1 characterized by said curved areas of said pedestal being substantially in rolling contact with said transverse edges of said rectangular opening during rocking movement of said rocker arm.
Claim 9
Dependent Claim
136 words
A boat-type rocker arm assembly comprising a pedestal having a fulcrum and a shank, said fulcrum extending outwardly beyond opposite sides of said shank, said fulcrum having curved lower surfaces of a predetermined radius, a boat-type rocker arm having a recessed intermediate area with a radius greater than the radius of said fulcrum, whereby said fulcrum engages said intermediate area on substantially line contact, said rocker arm having an opening centrally located in the intermediate area, said shank of said pedestal extending through said opening, said pedestal having opposite curved areas at the portion thereof extending through said opening, the dimension between said opposite curved areas being slightly less than the corresponding dimension across said opening, whereby the cooperation of said opening and-said pedestal substantially prevents longitudinal movement of said rocker arm relative to said pedestal.
Claim 10
Dependent Claim
136 words
A boat-type rocker arm assembly comprising a pedestal having a fulcrum and a shank, said fulcrum extending outwardly beyond opposite sides of said shank, said fulcrum having curved lower surfaces of a predetermined radius, a boat-type rocker arm having a recessed intermediate area with a radius greater than the radius of said fulcrum, whereby said fulcrum engages said intermediate area on substantially line contact, said rocker arm having an opening centrally located in the intermediate area, said shank of said pedestal extending through said opening, said pedestal having opposite curved areas at the portion thereof extending through said opening, the dimension between said opposite curved areas being slightly less than the corresponding dimension across said opening, whereby the cooperation of said opening and-said pedestal substantially prevents longitudinal movement of said rocker arm relative to said pedestal.
Claim 11
Dependent Claim
21 words
A boat-type rocker arm assembly according to claim 8 characterized by the radius of said intermediate surface being less than infinite.
Claim 12
Dependent Claim
29 words
A boat-type rocker arm assembly according to claim 8 characterized by the radius of said fulcrum being from 15% to 35% less than the radius of said intermediate surface.
Claim 13
Dependent Claim
36 words
A boat-type rocker arm assembly according to claim 8 characterized by said curved areas of said pedestal being substantially in rolling contact with the adjacent edges of said opening during rocking movement of said rocker arm.
Claim 14
Dependent Claim
25 words
A boat-type rocker arm assembly according to claim 8 characterized by said rocker arm opening being rectangular and having transverse edges tapering downwardly and inwardly.
Claim 15
Dependent Claim
38 words
A boat-type rocker arm assembly according to claim 12 characterized by the included angle between said tapered edges and the axis of said pedestal, when said rocker arm is in a middle position, being from 3° to 15°.
Claim 16
Dependent Claim
137 words
A boat-type rocker arm assembly comprising a pedestal having a fulcrum and a shank, said fulcrum extending outwardly beyond opposite sides of said shank, said fulcrum having curved lower surfaces of a predetermined radius, a boat-type rocker arm having a recessed intermediate area with a radius greater than the radius of said fulcrum, whereby said fulcrum engages said intermediate area on substantially line contact, said rocker arm having an opening centrally located in the intermediate area, said shank of said pedestal extending through said opening, said pedestal having opposite curved areas at the portion thereof extending through said opening, the dimension between said opposite curved areas being slightly less than the corresponding dimension across said opening, whereby the cooperation of said opening and said pedestal substantially prevents longitudinal movement of said rocker arm relative to said pedestal.
Claim 17
Dependent Claim
137 words
A boat-type rocker arm assembly comprising a pedestal having a fulcrum and a shank, said fulcrum extending outwardly beyond opposite sides of said shank, said fulcrum having curved lower surfaces of a predetermined radius, a boat-type rocker arm having a recessed intermediate area with a radius greater than the radius of said fulcrum, whereby said fulcrum engages said intermediate area on substantially line contact, said rocker arm having an opening centrally located in the intermediate area, said shank of said pedestal extending through said opening, said pedestal having opposite curved areas at the portion thereof extending through said opening, the dimension between said opposite curved areas being slightly less than the corresponding dimension across said opening, whereby the cooperation of said opening and said pedestal substantially prevents longitudinal movement of said rocker arm relative to said pedestal.
Claim 18
Dependent Claim
21 words
A boat-type rocker arm assembly according to claim 8 characterized by the radius of said intermediate surface being less than infinite.
Claim 19
Dependent Claim
29 words
A boat-type rocker arm assembly according to claim 8 characterized by the radius of said fulcrum being from 15% to 35% less than the radius of said intermediate surface.
Claim 20
Dependent Claim
36 words
A boat-type rocker arm assembly according to claim 8 characterized by said curved areas of said pedustal being substantially in rolling contact with the adjacent edges of said opening during rocking movement of said rocker arm.
Claim 21
Dependent Claim
29 words
A boat-type rocker arm assembly according to claim 14 characterized by the radius of said fulcrum being from 15% to 35% less than the radius of said intermediate surface.
Claim 22
Dependent Claim
21 words
A boat-type rocker arm assembly according to claim 14 characterized by the radius of said intermediate surface being less than infinite
Claim 23
Dependent Claim
27 words
A boat-type rocker arm assembly according to claim 14 characterized by said transverse edges of said rectangular opening being shorter than longitudinal edges of said rectangular opening.
Claim 24
Dependent Claim
29 words
A boat-type rocker arm assembly according to claim 14 characterized by said pedestal having opposite curved areas at the sides thereof extending through said opening near the transverse edges.
Claim 25
Dependent Claim
37 words
A boat-type rocker arm assembly according to claim 20 characterized by said curved areas of said pedestal being substantially in rolling contact with said transverse edges of said rectangular opening during rocking movement of said rocker arm.
Claim 26
Dependent Claim
124 words
A boat-type rocker arm assembly comprising a pedestal having a fulcrum and a shank, said fulcrum extending outwardly beyond opposite sides of said shank, said fulcrum having curved lower surfaces of a predetermined radius, a boat-type rocker arm having an intermediate area with a radius greater than the radius of said fulcrum, whereby said fulcrum engages said intermediate area on substantially line contact, said rocker arm having a rectangular opening centrally located in the intermediate area, said pedestal shank extending through said rectangular opening, said rectangular opening having transverse edges tapering downwardly and inwardly, the dimension between opposite sides of said shank at the portion extending through said rectangular opening being slightly less than the corresponding dimension across said opening between said transverse edges.
Claim 27
Dependent Claim
124 words
A boat-type rocker arm assembly comprising a pedestal having a fulcrum and a shank, said fulcrum extending outwardly beyond opposite sides of said shank, said fulcrum having curved lower surfaces of a predetermined radius, a boat-type rocker arm having an intermediate area with a radius greater than the radius of said fulcrum, whereby said fulcrum engages said intermediate area on substantially line contact, said rocker arm having a rectangular opening centrally located in the intermediate area, said pedestal shank extending through said rectangular opening, said rectangular opening having transverse edges tapering downwardly and inwardly, the dimension between opposite sides of said shank at the portion extending through said rectangular opening being slightly less than the corresponding dimension across said opening between said transverse edges.
Claim 28
Dependent Claim
37 words
A boat-type rocker arm assembly according to claim 14 characterized by the included angle between said tapered edges and the axis of said pedestal, when said arm is in a middle position, being from 3° to 15°.
Claim 29
Dependent Claim
37 words
A boat-type rocker arm assembly according to claim 15 characterized by the included angle between said tapered edges and the axis of said pedestal, when said arm is in u middle position, being from 4° to 8°.
References Cited (Backward Citations)
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