초록 ▼

A deactivation hydraulic valve lifter includes an elongate lifter body having a substantially cylindrical inner wall. The inner wall defines at least one annular pin chamber therein. The lifter body has a first end configured for engaging a cam of an engine. An elongate pin housing includes a substa

A deactivation hydraulic valve lifter includes an elongate lifter body having a substantially cylindrical inner wall. The inner wall defines at least one annular pin chamber therein. The lifter body has a first end configured for engaging a cam of an engine. An elongate pin housing includes a substantially cylindrical pin housing wall and pin housing bottom. The pin housing wall includes an inner surface and an outer surface. The pin housing bottom defines a radially directed pin bore therethrough. The pin housing is concentrically disposed within the inner wall of the lifter body such that the outer surface of the pin housing wall is adjacent to at least a portion of the inner wall of the lifter body. A plunger having a substantially cylindrical plunger wall with an inner surface and an outer surface is concentrically disposed within the pin housing such that the outer surface of the plunger wall is adjacent to at least a portion of the inner surface of the pin housing wall. A deactivation pin assembly is disposed within the pin bore and includes two pin members. The pin members are biased radially outward relative to each other. A portion of each pin member is disposed within the annular pin chamber to thereby couple the lifter body to the pin housing. The pin members are configured for moving toward each other when the pin chamber is pressurized, thereby retracting the pin members from within the annular pin chamber and decoupling the lifter body from the pin housing.

대표청구항 ▼

1. A deactivation hydraulic valve lifter, comprising:an elongate lifter body having a substantially cylindrical inner wall, said inner wall defining at least one annular pin chamber therein, said lifter body having a lower end configured for engaging a cam of an engine; an elongate pin housing inclu

1. A deactivation hydraulic valve lifter, comprising:an elongate lifter body having a substantially cylindrical inner wall, said inner wall defining at least one annular pin chamber therein, said lifter body having a lower end configured for engaging a cam of an engine; an elongate pin housing including a substantially cylindrical pin housing wall and pin housing bottom, said pin housing wall having an inner surface and an outer surface, said pin housing bottom defining a radially directed pin bore therethrough, said pin housing being substantially concentrically disposed within said inner wall of said lifter body such that said outer surface of said pin housing wall is adjacent to at least a portion of said inner wall of said lifter body, a plunger having a substantially cylindrical plunger wall, said plunger wall having an inner surface and an outer surface, said plunger being substantially concentrically disposed within said pin housing such that said outer surface of said plunger wall is adjacent to at least a portion of said inner surface of said pin housing wall; a deactivation pin assembly disposed at least partially within said pin bore, said deactivation pin assembly including two pin members, said pin members biased radially outward relative to each other, at least a portion of each said pin member being disposed within a corresponding one of said at least one annular pin chamber to thereby couple said lifter body to said pin housing, said pin members being configured for moving toward each other when said at least one annular pin chamber is pressurized, thereby retracting said pin members from within a corresponding one of said at least one annular pin chamber and decoupling said lifter body from said pin housing; and a vent groove disposed on an outside surface of said lifter body, said vent grove being disposed proximate to and a predetermined distance from said lower end of said lifter body.