# US 5,707,257 A · Elliptical battery post and terminal

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- Number: US 5,707,257 A
- Document ID: US5707257A
- Status: Granted
- Kind: A
- Application number: 08/792,178
- Filed: 1997-01-30
- Granted: 1998-01-13
- Earliest claimed: 1997-01-30
- Assignees: Yazaki Corporation
- Inventors: Nobuhiko Kotajima; Takeshi Takahashi
- Web page: https://patentgrep.com/patent/US5707257A

## CPC

- H01R 11/289: {characterised by the shape or the structure of the battery post}
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS

## Abstract

A battery connection comprises a battery post protruding from a battery and a battery cable terminal for clamping connection with the battery post. The battery post is an elliptical cylinder projecting perpendicularly from the surface of the battery, and the battery cable terminal has a mating elliptical clamping ring. When the clamping ring is fitted over the post and tightened therearound, the elliptical shapes of the post and terminal substantially prevent twisting of the terminal relative to the post and so inhibit loosening of the terminal. The smoothly curved, cornerless elliptical shape of the post allows the ring to slide around the perimeter of the post as the ring is tightened so that the normal contact force between the ring and the post is substantially constant around the perimeter thereof.

## Claims

### Claim 1

In combination, a battery having a battery post projecting from a surface thereof and a battery cable terminal for connection with the post, characterized in that:
the battery post comprises an elliptical cylinder and the terminal comprises a split elliptical clamping ring for encircling the elliptical cylinder, means for drawing adjacent ends of the clamping ring toward one another to tighten the clamping ring around the elliptical cylinder, and means for connecting the clamping ring to an electric cable.

### Claim 2 (depends on 1)

A battery and terminal combination according to claim 1 wherein the elliptical cylinder projects perpendicularly from the battery surface.

### Claim 3 (depends on 1)

A battery and terminal combination according to claim 1 wherein the post further comprises a base from which the elliptical cylinder projects, the base lying substantially parallel with the battery surface and extending outwardly beyond a perimeter of the cylinder.

### Claim 4

A battery cable terminal for use in combination with an elliptical battery post, the terminal comprising:
an elliptical clamping ring for encircling the battery post, the clamping ring being split along an axial line to define first and second ends proximate one another;
means for drawing the first and second ends of the clamping ring toward one another to tighten the clamping ring around the battery post; and
means for connecting the clamping ring to an electric cable.

### Claim 5 (depends on 4)

A battery cable terminal according to claim 4 further comprising first and second arms extending from the first and second ends of the clamping ring respectively.

### Claim 6 (depends on 5)

A battery cable terminal according to claim 5 wherein each of the arms has a hole formed therein, and the means for drawing the ends of the clamping ring toward one another comprises a bolt for passing through the holes and a nut for threaded engagement with the bolt and tightenable to urge the arms toward one another.

### Claim 7 (depends on 5)

A battery cable terminal according to claim 5 wherein the means for connecting the clamping ring to an electric cable comprises crimping tabs disposed at an end of one of the arms for engagement with the cable.