Gas injector
AssigneeEugen Seitz AG
InventorMichael Bronner
Life of this patent
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Abstract
A gas injector has an injector lance, a drive unit, a push rod and a valve. The injector lance has a free end for injecting gas into an external unit. The drive unit generates a linear movement of the push rod, as a result of which the push rod actuates the valve and exposes a valve through-passage opening, in order for the gas to be injected. The valve through-passage opening is arranged in the region of the free end of the injector lance ). The gas injector can be designed to be relatively small and narrow. It minimizes switching delays, avoids dead spaces and prevents contamination of the valve.
Claims15
A gas injector having an injector lance, a drive unit, a tappet rod and a valve, wherein the injector lance has a free end for injecting gas into an external unit, wherein the drive unit generates a linear movement of the tappet rod, whereby the tappet rod actuates the valve and releases a valve passage opening in order to inject the gas, wherein the valve passage opening is arranged in a region of the free end of the injector lance,
- wherein the injector lance has a shaft and the tappet rod is arranged within the shaft and is linearly displaceable relative thereto,
- wherein the free end of the injector lance is formed by a valve body, wherein the valve body is arranged at a free end of the shaft,
- wherein the valve body has a through-opening, which extends through the entire valve body and
- wherein the valve body comprises a first portion which forms a front free end of the gas injector, wherein the first portion merges into a second portion via a first taper,
- wherein, in the region of the first portion to the front end of the gas injector, the diameter of the through-opening is widened,
- and wherein the through-opening comprises in this region a constant diameter, until it leads in direction opposite to the outflow direction of the gas to a radially extending ledge or balcony, which serves as a stop and which forms the valve seat.
Dependencies are inferred from the claim text.