An improved cylinder head valve assembly design 10 that allows the valve head 16 to open and close at higher RPM's without valve float and no lash adjustments. More power is generated which can equate to better gas mileage. The design also allows for a lighter camshaft 30 enclosed in an oil compartment 62 for better cooling and less overall engine weight.

An improved cylinder head valve assembly design 10 that allows the valve head 16 to open and close at higher RPM's without valve float and no lash adjustments. More power is generated which can equate to better gas mileage. The design also allows for a lighter camshaft 30 enclosed in an oil compartment 62 for better cooling and less overall engine weight.

The invention relates to an apparatus (1) comprising a plurality of tools (2) each having at least one hydraulic chamber (6) for hydraulic liquid, and a hydraulic manifold (4) configured for storing pressurized hydraulic liquid and supplying hydraulic liquid to said plurality of tools (2), wherein each tool (2) comprises a communication conduit (7) extending between the hydraulic chamber (6) and said hydraulic manifold (4), the hydraulic chamber (6) having varying volume during the operation of the tool (2). The apparatus (1) is characterized in that each tool (2) comprises a hydraulic buffer unit (8) for preventing propagation of hydraulic pulsations between the tool (2) and the hydraulic manifold (4) in response to the varying volume of the hydraulic chamber (6), wherein the hydraulic buffer unit (8) has a buffer chamber (9) having varying volume in response to varying volume of the hydraulic chamber (6).

The invention relates to an apparatus (1) comprising a plurality of tools (2) each having at least one hydraulic chamber (6) for hydraulic liquid, and a hydraulic manifold (4) configured for storing pressurized hydraulic liquid and supplying hydraulic liquid to said plurality of tools (2), wherein each tool (2) comprises a communication conduit (7) extending between the hydraulic chamber (6) and said hydraulic manifold (4), the hydraulic chamber (6) having varying volume during the operation of the tool (2). The apparatus (1) is characterized in that each tool (2) comprises a hydraulic buffer unit (8) for preventing propagation of hydraulic pulsations between the tool (2) and the hydraulic manifold (4) in response to the varying volume of the hydraulic chamber (6), wherein the hydraulic buffer unit (8) has a buffer chamber (9) having varying volume in response to varying volume of the hydraulic chamber (6).