Flat rocker arm having a clevis
AssigneeToledo Technologies Inc.
InventorsStanley J. Pryba, Scott P. Smith
Life of this patent
Estimating the term…
Abstract
The present invention is directed to a rocker arm having a pivoting clevis mounted to a second end of the rocker arm that engages a valve stem or a bridge that activates dual valves. The clevis has a substantially flat contacting surface and an internal recess created by two upwardly extending walls and an upwardly facing cam surface or receiving the second end of the rocker arm. The clevis is attached to the second end of the rocker arm by an attachment pin that extends through the upwardly extending walls of the clevis and through the second end of the rocker arm. The second end of the rocker arm has a downwardly extending portion that mates with the upwardly facing cam surface of the clevis to allow the clevis to pivot about the attachment pin.
Claims24
A rocker arm assembly for an internal combustion engine with a push rod and at least one valve stem, comprising:
- a first end having a push rod engagement portion adapted to receive the push rod;
- an intermediate portion;
- and
- a second end which cooperates with at least one valve stem to provide reciprocating movement to at least one valve stem,
- wherein a clevis is pivotally attached to said second end and has a contacting surface that operationally engages at least one valve stem.
A rocker arm assembly for an internal combustion engine including a push rod and at least one valve stem comprising:
- a first end having a downward facing socket adapted to receive the push rod;
- an intermediate portion having a pivot ball socket;
- a second end having a convex, downwardly extending portion and a first mounting hole therethrough, wherein said second end cooperates with at least one valve stem to provide reciprocating movement to at least one valve stem;
- and
- a clevis having two upwardly extending walls, each with second mounting holes therethrough, and a concave cam surface connecting said two upwardly extending walls,
- wherein said clevis is pivotally attached to said second end when said first and second mounting holes are aligned and an attachment pin is positioned therein such that said clevis is pivotable about said pin.
A clevis which pivotally attaches to a rocker arm assembly comprising:
- a contacting surface;
- two upwardly extending walls, each with a mounting hole therethrough;
- and
- a cam surface which connects said two upwardly extending wall so as to form an internal recess,
- wherein said cam surface includes two engagement surfaces and a middle portion therebetween such that said two engagement surfaces selectively, slidably engage a downwardly extending portion of the rocker arm assembly, and such that when the clevis is pivotally attached to the rocker arm assembly, reciprocal motion of the rocker arm assembly will prevent scrubbing where said contacting surface operationally engages at least one valve stem.
Dependencies are inferred from the claim text.