Patent ID: 7409941

Claim:
A deactivating hydraulic valve apparatus for selectively coupling the rotary motion of a cam to the reciprocal motion of a combustion valve in an internal combustion engine, comprising: a) a body having a first axial bore and having a locking feature communicable with a first oil gallery in said engine; b) a pin housing slidably disposed in said first axial bore and having a second axial bore and having a transverse bore; c) a cup member disposed within said second axial bore; d) a plunger slidably disposed in said cup member and having a reservoir therein; e) a check valve disposed in said cup member communicating with said reservoir to define a low pressure chamber in said reservoir and a high pressure chamber between said plunger and said cup member; f) at least one locking pin slidably disposed in said transverse bore for selectively engaging said locking feature in said body in response to oil supplied from said first oil gallery; g) a lost motion spring compressively disposed in a chamber between said body and said pin housing for urging relative motion between said body and said pin housing; and h) an oil passage communicable with a second oil gallery in said engine and extending between an outer surface of said body and said reservoir, wherein said oil passage bypasses said chamber.