Trigger return and drop pendulum

• US 8,966,802 B1
• Filed: 11/14/2013
• Issued: 03/03/2015
• Est. Priority Date: 11/14/2013
• Status: Active Grant

• Current Assignee: Smith & Wesson
• Original Assignee: Smith & Wesson Corporation (Smith & Wesson Brands, Inc.)
• Inventors: Findlay, David S.
• Primary Examiner(s): DAVID, MICHAEL D
• Application Number:
  US14/080,036
• Time in Patent Office: 474 Days
• Field of Search: 42/690.1, 42/690.2, 42 7001- 7007
• US Class Current: 42/69.01
• CPC Class Codes: F41A 19/10 Triggers; Trigger mountings
• CPC Class Codes: F41A 19/12 Sears; Sear mountings

Abstract

A trigger assembly has a sear with a stop surface engageable with a reciprocating component for holding the reciprocating component in a cocked configuration. The sear also has a sear cam engageable with a lever movably mounted within the assembly. A trigger is movable into and out of engagement with the lever. Pulling the trigger moves it out of engagement with the lever and releases the sear. A trigger return pendulum has a trigger cam engageable with the trigger, a lever cam engageable with the lever, and a head cam follower engageable with the reciprocating component. Motion of the reciprocating component acting through the head cam follower of the trigger return pendulum forces the lever cam into engagement with the lever and the trigger cam into engagement with the trigger to return the lever and the trigger to a configuration of engagement between the trigger and the lever.

Claims

1. A trigger assembly for a firearm having a reciprocating component, said trigger assembly comprising:

a sear movably mounted within said assembly, said sear having a stop surface engageable with said reciprocating component for holding said reciprocating component in a cocked configuration, said sear further comprising a sear cam;

a lever movably mounted within said assembly, said lever having a contact surface, said sear cam engaging said lever;

a trigger movably mounted within said assembly, said trigger having an action surface movable into and out of engagement with said contact surface upon motion of said trigger;

a spring acting on said lever and biasing said contact surface out of engagement with said action surface;

a trigger return pendulum movably mounted within said assembly, said trigger return pendulum having a trigger cam engageable with said trigger, a lever cam engageable with said lever, and a head cam follower engageable with said reciprocating component;

wherein

motion of said reciprocating component acting through said head cam follower of said trigger return pendulum forces said lever cam into engagement with said lever and said trigger cam into engagement with said trigger to return said lever and said trigger to a configuration of engagement between said action surface and said contact surface.

2. The trigger assembly according to claim 1, wherein said sear is pivotably mounted on a sear fulcrum.

3. The trigger assembly according to claim 2, wherein said stop surface is angularly oriented relatively to a line of motion of said reciprocating component to permit said reciprocating component to pivot said sear about said sear fulcrum upon motion of said reciprocating component along said line of motion against said stop surface.

4. The trigger assembly according to claim 2, wherein said lever is pivotably mounted on a lever fulcrum.

5. The trigger assembly according to claim 4, wherein said sear cam engages said lever on one side of said lever fulcrum and said contact surface is positioned on said one side of said lever fulcrum.

6. The trigger assembly according to claim 4, wherein said trigger is pivotably mounted on a trigger fulcrum.

7. The trigger assembly according to claim 6, wherein said trigger comprises an actuation arm and a projection extending transversely thereto, said projection being engageable with said trigger cam.

8. The trigger assembly according to claim 6, wherein said trigger return pendulum is pivotably mounted on a trigger return pendulum fulcrum.

9. The trigger assembly according to claim 8, wherein said lever cam engages said lever on an opposite side of said lever fulcrum from said contact surface.

10. The trigger assembly according to claim 8, wherein said trigger return pendulum fulcrum is positioned at one end of said trigger return pendulum, said lever cam is positioned at an opposite end of said trigger return pendulum, and said trigger cam is positioned between said ends of said trigger return pendulum.

11. The trigger assembly according to claim 8, further comprising first and second sideplates attached to one another in spaced apart relation, said sear, said lever, said trigger and said trigger return pendulum being mounted between said sideplates.

12. The trigger assembly according to claim 11, wherein said sear fulcrum, said lever fulcrum, said trigger fulcrum and said trigger return pendulum fulcrum each comprises a respective pin extending between said sideplates.

13. A trigger assembly for a firearm having a reciprocating component, said trigger assembly comprising:

first and second sideplates arranged in parallel, spaced apart relation;

a sear pin extending between said first and second sideplates;

a sear pivotally mounted on said sear pin, said sear having a stop surface engageable with said reciprocating component for holding said reciprocating component in a cocked configuration, said sear further comprising a sear cam;

a lever pivot pin extending between said first and second sideplates;

a lever pivotally mounted on said lever pivot pin, said lever having a contact surface, said sear cam engaging said lever;

a trigger pivot pin extending between said first and second sideplates;

a trigger pivotally mounted on said trigger pivot pin, said trigger having an action surface movable into and out of engagement with said contact surface upon motion of said trigger;

a spring acting on said lever and biasing said contact surface out of engagement with said action surface;

a trigger return pendulum pin extending between said first and second sideplates;

a trigger return pendulum pivotally mounted on said trigger return pendulum pin, said trigger return pendulum having a trigger cam engageable with said trigger, a lever cam engageable with said lever, and a head cam follower engageable with said reciprocating component;

wherein

motion of said reciprocating component acting through said head cam follower of said trigger return pendulum forces said lever cam into engagement with said lever and said trigger cam into engagement with said trigger to return said lever and said trigger to a configuration of engagement between said action surface and said contact surface.

14. The trigger assembly according to claim 13, wherein said stop surface is angularly oriented relatively to a line of motion of said reciprocating component to permit said reciprocating component to pivot said sear about said sear pin upon motion of said reciprocating component along said line of motion against said stop surface.

15. The trigger assembly according to claim 13, wherein said sear cam engages said lever on one side of said lever pivot pin and said contact surface is positioned on said one side of said lever pivot pin.

16. The trigger assembly according to claim 13, wherein said trigger comprises an actuation arm and a projection extending transversely thereto, said projection being engageable with said trigger cam.

17. The trigger assembly according to claim 13, wherein said lever cam engages said lever on an opposite side of said lever pivot pin from said contact surface.

18. The trigger assembly according to claim 13, wherein said trigger return pendulum pin is positioned at one end of said trigger return pendulum, said lever cam is positioned at an opposite end of said trigger return pendulum, and said trigger cam is positioned between said ends of said trigger return pendulum.

19. A firearm, said firearm comprising:

a reciprocating component;

a trigger assembly comprising;

a sear movably mounted within said assembly, said sear having a stop surface engageable with said reciprocating component for holding said reciprocating component in a cocked configuration, said sear further comprising a sear cam;

a lever movably mounted within said assembly, said lever having a contact surface, said sear cam engaging said lever;

a trigger movably mounted within said assembly, said trigger having an action surface movable into and out of engagement with said contact surface upon motion of said trigger;

a spring acting on said lever and biasing said contact surface out of engagement with said action surface;

a trigger return pendulum movably mounted within said assembly, said trigger return pendulum having a trigger cam engageable with said trigger, a lever cam engageable with said lever, and a head cam follower engageable with said reciprocating component;

wherein

motion of said reciprocating component acting through said head cam follower of said trigger return pendulum forces said lever cam into engagement with said lever and said trigger cam into engagement with said trigger to return said lever and said trigger to a configuration of engagement between said action surface and said contact surface.

20. The firearm according to claim 19, wherein said sear is pivotably mounted on a sear fulcrum.

21. The firearm according to claim 20, wherein said stop surface is angularly oriented relatively to a line of motion of said reciprocating component to permit said reciprocating component to pivot said sear about said sear fulcrum upon motion of said reciprocating component along said line of motion against said stop surface.

22. The firearm according to claim 20, wherein said lever is pivotably mounted on a lever fulcrum.

23. The firearm according to claim 22, wherein said sear cam engages said lever on one side of said lever fulcrum and said contact surface is positioned on said one side of said lever fulcrum.

24. The firearm according to claim 22, wherein said trigger is pivotably mounted on a trigger fulcrum.

25. The firearm according to claim 24, wherein said trigger comprises an actuation arm and a projection extending transversely thereto, said projection being engageable with said trigger cam.

26. The firearm according to claim 24, wherein said trigger return pendulum is pivotably mounted on a trigger return pendulum fulcrum.

27. The firearm according to claim 26, wherein said lever cam engages said lever on an opposite side of said lever fulcrum from said contact surface.

28. The firearm according to claim 26, wherein said trigger return pendulum fulcrum is positioned at one end of said trigger return pendulum, said lever cam is positioned at an opposite end of said trigger return pendulum, and said trigger cam is positioned between said ends of said trigger return pendulum.

29. The firearm according to claim 26, further comprising first and second sideplates attached to one another in spaced apart relation, said sear, said lever, said trigger and said trigger return pendulum being mounted between said sideplates.

30. The firearm according to claim 29, wherein said sear fulcrum, said lever fulcrum, said trigger fulcrum and said trigger return pendulum fulcrum each comprises a respective pin extending between said sideplates.

31. The firearm according to claim 19, wherein said firearm comprises a bolt action rifle and said reciprocating component comprises a firing pin head.

32. The firearm according to claim 19, wherein said firearm comprises a semi-automatic rifle and said reciprocating member comprises a bolt carrier.

33. The firearm according to claim 19, wherein said firearm comprises an automatic rifle and said reciprocating member comprises a bolt carrier.

34. The firearm according to claim 19, wherein said firearm comprises a pistol and said reciprocating member comprises a slide.