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FIFTH WHEEL HITCH JAM NUT TOOL

IP.com Disclosure Number: IPCOM000250614D
Publication Date: 2017-Aug-09
Document File: 2 page(s) / 80K

Publishing Venue

The IP.com Prior Art Database

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This is the abbreviated version, containing approximately 53% of the total text.

FIFTH WHEEL HITCH JAM NUT TOOL Introduction During installation of fifth wheel to vehicle often times one or more of the jam nuts must be loosened to allow lateral adjustment. Referring to Fig 1. Loosening nut 1 allows the anchor bushing 2 to move within a slot in base plate 3. This permits alignment needed for insertion of the T-bolts 4 to the mating structure which is rigidly mounted. Not loosening one or more jam nuts can make installation difficult or impossible. Additionally, for maintenance purposes, it is recommend that these jam nuts are checked periodically for tightness. The jam nut is situated such that a conventional spanner wrench cannot be effective. There are also other components (not shown in detail) that do not allow usage of a socket type tool. It is recommended that the jam nut be tightened to a specific torque. The torque amount is such that a relatively long lever is needed to apply such torque without the aid of power equipment. A tool is needed to allow access and sufficient rotation of the jam nut. The tool must have sufficient strength to permit torque required without deformation to the tool. The tool must not deform jam nut particularly at the corners (often referred to as stripping). The tool must work for all 4 locations of the fifth wheel assembly. The tool must function for both clockwise and counterclockwise directions. The tool must account for dimensional variations of the jam nut. Additionally, it is preferred that, when coupled with a torque wrench, the angular relationship between the torque wrench and tool would allow simplified calculation of resulting torque to jam nut whereby the torque setting must be adjusted to account for the increase in effective length. Description The proposed tool is a single component having a uniform thickness intended to be used primarily as an adaptor. Referring to Fig 2. One end, referred to as the jaw 5, has an upper finger 6 and a lower finger 7 which insert onto opposing flat surfaces of the hexagonal jam nut 8. The opposing end, referred to as the base 9, has a...