Trailer tongue pivot hinge

1. A pivot assembly for a tongue of a towing trailer, the assembly comprising:

a trailer arm adapter comprising:

a first engagement face positioned at an angle other than perpendicular relative to a longitudinal axis through the trailer arm adapter;

a first pivot hinge member extending from the first engagement face; and

a first coupling hinge member extending from the first engagement face and opposed to the first pivot hinge member;

a coupler arm adapter comprising:

a second engagement face positioned at an angle other than perpendicular relative to the longitudinal axis through the coupler arm adapter;

a second pivot hinge member extending from the second engagement face; and

a second coupling hinge member extending from the second engagement face and opposed to the second pivot hinge member; and

a pivot member selectively positionable to engage the first pivot hinge member and the second pivot hinge member to pivotally engage the trailer arm adapter to the couple arm adapter.

2. The pivot assembly of claim 1 , further comprising a coupling member selectively positionable to engage the first coupling hinge member and the second coupling hinge member to rigidly couple the trailer arm adapter to the couple arm adapter when the pivot member is engaged.

3. The pivot assembly of claim 2 , where the first engagement face abuts the second engagement face when the pivot member is engaged and the coupling member is engaged.

4. The pivot assembly of claim 1 , further comprising:

a first passage through the trailer arm adapter; and

a second passage through the coupler arm adapter.

5. The pivot assembly of claim 4 , where the first passage is sized to selectively engage a trailer arm of the tongue, and the second passage is sized to selectively engage a coupler arm of the tongue.

6. The pivot assembly of claim 5 , where the first passage is generally square is shape and the second passage is generally square in shape.

7. The pivot assembly of claim 5 , further comprising:

at least one aperture through the trailer arm adapter sized to accept a fastener to secure the trailer arm adapter to the trailer arm; and

at least one aperture through the coupler arm adapter sized to accept a fastener to secure the coupler arm adapter to the coupler arm.

8. The pivot assembly of claim 5 , further comprising:

a first flange extending from the trailer arm adapter positioned to selectively secure the trailer arm adaptor to the trailer arm through welding of the first flange to the trailer arm; and

a second flange extending from the coupler arm adapter positioned to selectively secure the coupler arm adaptor to the coupler arm through welding of the second flange to the coupler arm.

9. A pivoting assembly for a towing trailer comprising:

a trailer arm adapter comprising:

a trailer arm adapter body;

a trailer arm adapter chamber through the trailer arm adapter body sized to selectively receive a trailer arm of the towing trailer;

a first engagement surface positioned at an angle other than perpendicular relative to a longitudinal axis through the trailer arm adapter chamber;

a first hinge member extending from a first side of the trailer arm adapter body; and

a second hinge member extending from a second side of the trailer arm adapter body;

a coupler arm adapter comprising:

a coupler arm adapter body;

a coupler arm adapter chamber through the coupler arm adapter body sized to selectively receive a coupler arm of the towing trailer;

a third hinge member extending from a first side of the coupler arm adapter body; and

a fourth hinge member extending from a second side of the coupler arm adapter body; and

a first connecting member selectively positionable to couple the first hinge member and the third hinge member to pivotally connect the trailer arm adapter to the couple arm adapter.

10. The pivoting assembly of claim 9 , further comprising a second connecting member selectively positionable to couple the second hinge member and the fourth hinge member to rigidly secure the trailer arm adapter to the couple arm adapter when the first connecting member is engaged.

11. The pivoting assembly of claim 10 , further comprising:

a first bore through the first hinge member;

a second bore through the second hinge member;

a third bore through the third hinge member; and

a fourth bore through the fourth hinge member;

wherein the first connecting member is a pivot pin that passes through the first bore and the third bore, and the second connecting member is a pin that passes through the second bore and the fourth bore.

12. The pivoting assembly of claim 9 , where the first chamber is generally square in shape and the second passage is generally square in shape.

13. The pivoting assembly of claim 9 , further comprising:

at least one aperture through the trailer arm adapter body sized to accept a fastener to secure the trailer arm adapter to the trailer arm; and

at least one aperture through the coupler arm adapter body sized to accept a fastener to secure the coupler arm adapter to the coupler arm.

14. The pivoting assembly of claim 9 , further comprising:

a first flange extending from the trailer arm body positioned to selectively secure the trailer arm adaptor to the trailer arm through welding of the first flange to the trailer arm; and

a second flange extending from the coupler arm body positioned to selectively secure the coupler arm adaptor to the coupler arm through welding of the second flange to the coupler arm.

15. The pivoting assembly of claim 9 , where the coupler arm is positionable between a towing position where the coupler arm and the trailer arm are generally aligned along a common longitudinal axis, and a storage position, where the coupler arm and the trailer arm are not aligned along a common longitudinal axis.

16. A method of adjusting the length of a tongue of a towing trailer comprising:

securing a trailer arm adapter to a trailer arm of the tongue, the trailer arm adapter comprising a first angled engagement surface positioned at an angle other than perpendicular relative to a longitudinal axis, a first hinge member extending from a first side of the trailer arm adapter, and a second hinge member extending from a second side of the trailer arm adapter;

securing a coupler arm adapter to a coupler arm of the tongue, the coupler adapter comprising a second angled engagement surface positioned at an angle other than perpendicular relative to the longitudinal axis, a third hinge member extending from a first side of the coupler arm adapter, and a second hinge member extending from a second side of the coupler arm adapter;

positioning a pivoting member to engage the first hinge member and the third hinge member to pivotally connect the trailer arm adapter to the couple arm adapter; and

rotating the coupler arm adapter about the pivot member.

17. The method of claim 16 , further comprising:

positioning the coupler arm generally along a common axis with the trailer arm; and

positioning a securing member to engage the second hinge member and the fourth hinge member to rigidly connect the trailer arm adapter to the couple arm adapter.

18. The method of claim 16 , further comprising:

positioning fasteners through the trailer arm adapter and the trailer arm to secure the trailer arm adapter to the trailer arm; and

positioning fasteners through the coupler arm adapter and the coupler arm to secure the coupler arm adapter to the coupler arm.

19. The method of claim 16 , further comprising severing the tongue of the towing trailer to form the coupler arm from the section of the tongue severed and to form the trailer arm from the remainder of the tongue extending from the towing trailer.

20. The method of claim 16 , further comprising:

manufacturing the trailer arm integrally with the towing trailer; and

manufacturing the coupler arm as a separate member from the towing trailer.