Roller hydraulic valve lifter
AssigneeGeneral Motors Corporation
InventorLouis J. Van Slooten
Life of this patent
Estimating the term…
Abstract
A roller hydraulic valve lifter or similar cam follower mechanism wherein the follower of such an assembly or mechanism is provided with a pair of spaced apart struts to receive the opposed free ends of a roller shaft carrying a cam follower roller. Each free end of the roller shaft is provided with opposed flats parallel to the axis of the shaft to define abutment shoulders which engage the struts to limit axial movement of the roller shaft in the follower. Each strut is provided at its free end with a tang that is bent over to partly encircle a free end of the roller shaft whereby to retain the cam follower roller and roller shaft in unit assembly with the follower.
Claims2
In a valve tappet of the type including a follower with a cam follower roller rotatably journaled on a roller shaft, the improvement wherein said follower has two pairs of oppositely facing depending struts thereon with a roller space therebetween, each said strut including a depending tang at the free end thereof;
- each said pair of said struts having a shaft space between facing said struts aligned with the shaft space of the other said pair of said struts and, wherein said roller shaft includes an intermediate circular journal portion on which said cam follower roller is journaled and free end portions at opposite ends thereof;
- each said free end portion having opposed flats thereon, each said flat being connected by a radial abutment shoulder to said circular journal portion, said free ends with said flats thereon of said roller shaft being slidably received in said shaft spaces with said roller shaft then retained against axial movement in opposite directions by abutment of the said abutment shoulders against said struts, the free ends of said depending tangs of each said pair of said struts being positioned so as to at least partly encircle said free end portions of said roller shaft whereby to retain said roller shaft and therefor the cam follower roller to said follower in unit assembly therewith.
In a valve tappet assembly of the type including a cam follower roller rotatably journaled on a roller shaft supported on follower of the assembly, the improvement wherein said follower is a two-part assembly consisting of a cylinder follower member and a roller shaft retainer fixed to one end of the cylinder follower member;
- the roller shaft retainer having two pairs of oppositely facing depending strut means thereon with a roller space therebetween, each said pair of said strut means having a shaft space between facing struts of said strut means aligned with the shaft space of the other said pair and, wherein said roller shaft includes an intermediate circular shaft portion on which said cam follower roller is journaled and opposite free end portions each with opposed flats thereon, said flats being connected by radial shoulders to said circular shaft portion, said free ends of said roller shaft with said flats thereon being slidably received in said shaft spaces whereby said roller shaft is retained for limited axial movement in opposite directions by abutment of said radial shoulders against said strut means, the free ends of said pairs of depending strut means including bent-over tangs positioned to at least partly encircle said free end portions of said roller shaft whereby to retain said roller shaft and therefor said roller to said follower in unit assembly therewith.
Dependencies are inferred from the claim text.