Patent ID: 11933424
Assignee: CATERPILLAR INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A gas admission valve assembly for controlling the flow of a gas, the gas admission valve assembly comprising:
a housing including a central bore defining a central axis, an entry chamber disposed about said central axis, at least one gas entry opening that opens into the entry chamber, a gas exit opening that opens into the entry chamber, and a valve seat disposed about the gas exit opening, the gas exit opening and the valve seat being concentrically disposed about the central axis;
a valve including a valve head and a valve stem, the valve stem having a peripheral surface, a distal stem end and a proximal stem end, the valve head being disposed at the distal stem end of the valve stem, the valve stem being slidably disposed for movement along the central axis of the housing to selectively move the valve head into and out of contact with the valve seat, the valve head blocking flow between the entry chamber and the gas exit opening when the valve head is in contact with the valve seat;
an elongated valve guide having a proximal guide end and a distal guide end, and being concentrically disposed about a portion of the valve stem between the valve stem and the central bore of the housing, the valve stem being slidably disposed within the elongated valve guide for movement along the central axis;
a first stem seal disposed distally the elongated valve guide and in sealing engagement with the peripheral surface of the valve stem and the central bore of the housing to inhibit flow from the entry chamber between the valve stem and the housing;
a second stem seal including a second sealing element disposed in sealing engagement with the peripheral surface of the valve stem at the proximal guide end; and
a biasing element coupled to the proximal stem end, the biasing element including proximal and distal biasing element ends, the second stem sealing element being disposed between the proximal biasing element end and the distal biasing element end.