Clevis link for toggle mechanism of ram air turbine actuator

Abstract

A clevis for use in a toggle mechanism of a ram air turbine actuator is provided comprising a first side; a second side parallel to the first side; a first set of parallel pivot holes; second set of parallel pivot holes; a set of parallel through holes; and a helicoil blind hole. The second side rigidly connected to the first side via at least one brace perpendicular to the first side and the second side. The helicoil blind hole being located in the first side and extending into the at least one brace. The first side having a first hole of the first set of parallel pivot holes, a first hole of the second set of parallel pivot holes, and a first hole of the set of parallel through holes. The second side having the hole pattern reflective of the first side, composed of second holes.

What is claimed is: 
     
       1. A clevis for use in a toggle mechanism of a ram air turbine actuator comprising:
 a first side; 
 a second side parallel to the first side, the second side rigidly connected to the first side via at least one brace perpendicular to the first side and the second side; 
 a first set of parallel pivot holes, a first hole of the first set of parallel pivot holes being located in the first side and a second hole of the first set of parallel pivot holes being located in the second side; 
 a second set of parallel pivot holes, a first hole of the second set of parallel pivot holes being located in the first side and a second hole of the second set of parallel pivot holes being located in the second side; 
 a set of parallel through holes, a first hole of the set of parallel through holes being located in the first side and a second hole of the set of parallel through holes being located in the second side; and 
 a helicoil blind hole, the helicoil blind hole being located in the first side and extending into the at least one brace. 
 
     
     
       2. The clevis of  claim 1 , wherein:
 the second hole of the first set of parallel pivot holes is a blind hole, wherein the blind hole opens towards the first side. 
 
     
     
       3. A toggle mechanism of a ram air turbine actuator comprising:
 a clevis including:
 a first side; 
 a second side parallel to the first side, the second side rigidly connected to the first side via at least one brace perpendicular to the first side and the second side; 
 a first set of parallel pivot holes, a first hole of the first set of parallel pivot holes being located in the first side and a second hole of the first set of parallel pivot holes being located in the second side; 
 a second set of parallel pivot holes, a first hole of the second set of parallel pivot holes being located in the first side and a second hole of the second set of parallel pivot holes being located in the second side; 
 a set of parallel through holes, a first hole of the set of parallel through holes being located in the first side and a second hole of the set of parallel through holes being located in the second side; 
 a helicoil blind hole, the helicoil blind hole being located in the first side and extending into the at least one brace; 
 
 a cross rod operably connected to the clevis and located in the set of parallel through holes; and 
 a cap screw located in the helicoil blind hole, the cap screw securing the cross rod to the clevis. 
 
     
     
       4. The toggle mechanism of  claim 3 , wherein:
 the second hole of the first set of parallel pivot holes is a blind hole, wherein the blind hole opens towards the first side. 
 
     
     
       5. The toggle mechanism of  claim 3 , wherein:
 the cross rod has a first section, a second section, and a midsection between the first section and the second section, the midsection includes a flange having a through hole. 
 
     
     
       6. The toggle mechanism of  claim 5 , wherein:
 the first section has a first diameter, the second section has a second diameter, and the midsection has a third diameter, the third diameter being larger than at least one of the first diameter and the second diameter. 
 
     
     
       7. The toggle mechanism of  claim 5 , wherein:
 the midsection includes a clearance notch. 
 
     
     
       8. The toggle mechanism of  claim 5 , further comprising:
 a lock piston operably connected to the clevis through a link, the link being operably connected to the first set of parallel pivot holes via a pivot pin, wherein the pivot pin is secured in the first set of parallel pivot holes by the flange. 
 
     
     
       9. The toggle mechanism of  claim 3 , further comprising:
 a bracket operably connected to the clevis at the second set of parallel pivot holes via a biasing mechanism. 
 
     
     
       10. The toggle mechanism of  claim 5 , wherein:
 the cap screw secures the cross rod to the clevis via the through hole. 
 
     
     
       11. A method of manufacturing a toggle mechanism of a ram air turbine actuator comprising:
 forming a first side of a clevis; 
 forming a second side of a clevis; 
 rigidly connecting the second side to the first side via at least one brace perpendicular to the first side and the second side, the first side being parallel to the second side; 
 forming a first set of parallel pivot holes, a first hole of the first set of parallel pivot holes being located in the first side and a second hole of the first set of parallel pivot holes being located in the second side; 
 forming a second set of parallel pivot holes, a first hole of the second set of parallel pivot holes being located in the first side and a second hole of the second set of parallel pivot holes being located in the second side; 
 forming a set of parallel through holes, a first hole of the set of parallel through holes being located in the first side and a second hole of the set of parallel through holes being located in the second side; 
 drilling a helicoil blind hole, the helicoil blind hole being located in the first side and extending into the at least one brace; 
 inserting a cross rod into the set of parallel through holes within the clevis; and 
 installing a cap screw in the helicoil blind hole, the cap screw securing the cross rod to the clevis. 
 
     
     
       12. The method of  claim 11 , wherein:
 the second hole of the first set of parallel pivot holes is a blind hole, wherein the blind hole opens towards the first side. 
 
     
     
       13. The method of  claim 11 , wherein:
 the cross rod has a first section, a second section, and a midsection between the first section and the second section, the midsection includes a flange having a through hole. 
 
     
     
       14. The method of  claim 13 , wherein:
 the first section has a first diameter, the second section has a second diameter, and the midsection has a third diameter, the third diameter being larger than at least one of the first diameter and the second diameter. 
 
     
     
       15. The method of  claim 13 , wherein:
 the midsection includes a clearance notch. 
 
     
     
       16. The method of  claim 13 , further comprising:
 operably connecting a lock piston to the clevis through a link, the link being operably connected to the first set of parallel pivot holes via a pivot pin, wherein the pivot pin is secured in the first set of parallel pivot holes by the flange. 
 
     
     
       17. The method of  claim 11 , further comprising:
 operably connecting a bracket to the clevis at the second set of parallel pivot holes via a biasing mechanism. 
 
     
     
       18. The method of  claim 13 , wherein:
 the cap screw secures the cross rod to the clevis via the through hole.