# Patent

## Title
Central injection device for internal combustion engines

## Abstract

As many possible embodiments may be made of this invention without departing from the spirit or scope thereof, it is to be understood that all matters hereinabove set forth or shown in the accompanying drawings are to be interpreted as illustrative and not in any limiting sense.

## Background
## Claims

1. A bonnet and actuator assembly for use with a valve adapted for use in a line including a valve body and a valve member, the assembly being adapted to be connected to the valve body by bolts, comprising: receive said bolts to bolt the bonnet to the valve body; valve member in said valve body; the stem; extending downwardly therefrom into engagement with said outturned flange outwardly of said bolt holes so as to protect said bolts connecting the bonnet with the valve body, when assembled thereon, from direct contact by heat from external fires and retarding heat induced deterioration of said bolts holding the bonnet to the valve body and, of said shroud for releasably connecting said shroud to said bonnet, whereby said bolts can be removed without disconnecting said bonnet from said valve body.

2. The assembly of claim 1, including a second outturned flange on the bonnet above the first flange adapted to receive said fastener bolts and to provide a chamber therebetween to receive the heads or nuts of the bolts when the bonnet is bolted to the valve body.

3. The assembly of claim 2 wherein said chamber contains a heat insulating material for further retarding the application of heat to the bolts.

4. The assembly of claim 2 wherein the second outturned flange is integral with said bonnet.

5. The assembly of claim 2 wherein the second outturned flange is rotatably mounted on said bonnet so that the actuator can be angularly oriented in different positions.

6. The assembly of claim 1 wherein said stem actuator means includes a spring disposed within said shroud and connected to said actuator stem to urge the latter in one direction; a stop for limiting movement of the actuator stem in said one direction; said stem actuator means including a motor for moving the actuator stem in the opposite direction and having a releasable connection with the actuator stem permitting the motor, actuator housing and shroud to be moved upwardly as a unit and removed from the bonnet while the actuator stem and spring remain in or on the bonnet whereby inspection or repair to the motor or actuator housing can be made without bleeding down the line in which the valve body is installed.

7. The assembly of claim 6 wherein the connection of the spring to the stem includes a bearing permitting the spring to wind and unwind during movement of the actuator stem without exerting substantial torque on the actuator stem.

8. The assembly of claim 7 wherein the connection between the motor and actuator stem likewise includes a bearing permitting the stem to be rotated without exerting substantial torque on the motor.

9. The assembly of claim 6 wherein said stop is provided by a seat in the bonnet and a seat carried by the actuator stem for engagement with the bonnet seat to form a seal therewith upon predetermined outward movement of the actuator stem.

10. A bonnet and actuator assembly for use with a valve which includes a valve body and a valve member .Iadd.within the valve body for controlling pressurized fluid flow through the valve and that is serviceable while the valve remains in a pressurized state, comprising: with said valve member in said valve body; so that when the stem actuator means is released, it is slidable outwardly along said stem; the actuator stem outwardly of the actuator housing; the actuator stem outwardly of the actuator housing; and released, permits the actuator housing and stem actuator means to be removed from the bonnet .Iadd., allowing said actuator housing and stem actuator means to be slid outwardly along said actuator stem .Iaddend.while .Iadd.said actuator stem remains connected to the valve member within the valve body and the valve remains in the pressurized state, .Iaddend.the stop means .[.limits.]. .Iadd.limiting .Iaddend.outward movement of the actuator stem under the influence of said resilient means.

11. The assembly of claim 10 wherein the resilient means is a compression spring and its connection to the actuator stem includes a bearing permitting the spring to wind and unwind during movement of the actuator stem without exerting substantial torque on the actuator stem.

12. The assembly of claim 11 wherein the connection between the stem actuator means and the actuator stem like-wise includes a bearing permitting the stem to be rotated without exerting substantial torque on the stem actuator means. .Iadd.

13.  A bonnet and actuator assembly for use with a valve adapted for handling fluids under pressure and which includes a valve body and a valve member within the valve body for controlling pressurized fluid flow through the valve and that is serviceable while the valve remains in a pressurized state, said assembly comprising: pressure isolation relation to the valve; and closing forces to said valve member through said bonnet; stem inwardly with respect to said bonnet; said bonnet; respect to said bonnet; stem such that when said actuator housing is released form said bonnet, said stem actuator means is removable with said actuator housing from said bonnet and actuator stem while the flowpath of the valve remains in the pressurized state, said stop means limiting the outward movement of said actuator stem under the influence of said resilient means. .Iaddend. .Iadd.

14.  The assembly as claimed in claim 13, wherein said resilient means includes: actuator means; spring retainer plate. .Iaddend. .Iadd.15. The assembly as claimed in claim 14, including bearing means for permitting said spring retainer plate to rotate with respect to said actuator stem. .Iaddend. .Iadd.16. The assembly as claimed in claim 13, wherein: housing and a diaphragm plate connected to said diaphragm; actuator stem includes a thrust element connected to said actuator stem, said diaphragm plate being abuttable with said thrust element to transfer downwardly directed force to said actuator stem, said diaphragm plate being movable upwardly with respect to said thrust member. .Iaddend. .Iadd.7.  A valve actuator for use on a valve having a flowpath therein adapted for handling fluids under pressure and serviceable while the flowpath is in a pressurized state, said actuator comprising: pressure isolating relationship to the flowpath of the valve with which the actuator is to be used; between a first and second position; relationship to the flowpath of the valve; and each actuator stem for urging each stem in an inward direction toward a selected one of its first and second positions such that inward movement of said stem actuator means causes inward movement of each actuator stem; when each actuator stem moves in an outward direction such that said stem actuator means is free to be removed outwardly, relatively away from said engagement with each actuator stem while the flowpath of the valve remains in the pressurized state; means for urging each actuator stem toward the other of the selected first and second positions. .Iaddend. .Iadd.18. A valve actuator for use on a valve having a flowpath therein adapted for handling fluids under pressure and serviceable while the flowpath is in a pressurized state, said actuator comprising: pressure isolation relationship to the flowpath of the valve with which the actuator is to be used while the flowpath of the valve is in the pressurized state; assembly including a diaphragm connected to said actuator housing and a diaphragm plate connected to said diaphragm; spring to said actuator stem; actuator stem and; with respect to said actuator stem and said spring while the flowpath of the valve remains in the pressurized state. .Iaddend.