# US 10,308,070 B1 · Internally threaded axle tube and spindle assembly

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- Number: US 10,308,070 B1
- Document ID: US10308070B1
- Status: Granted
- Kind: B1
- Application number: 15/888,602
- Filed: 2018-02-05
- Granted: 2019-06-04
- Earliest claimed: 2017-04-13
- Assignees: UA Holdings, Inc.
- Applicants: Axle Tech Inc.
- Inventors: Todd Carroll
- Web page: https://patentgrep.com/patent/US10308070B1

## CPC

- B60B 35/08: of closed hollow section
- B60B 27/0094: {one or more of the bearing races are formed by the hub}
- B60B 27/06: adapted to be fixed on axle
- B60B 35/006: {with mounting plates or consoles fitted to axles}
- B60B 35/14: composite or split, e.g. half- axles; Couplings between axle parts or sections
- B60B 35/16: Axle housings
- B60B 35/04: straight
- B60B 35/12: Torque-transmitting axles (independent suspension aspects B60G)
- B60B 2310/302: by welding
- B60B 2320/10: Assembling; disassembling
- B60B 2900/113: Production or maintenance time
- B60B 2900/541: Servicing
- B60B: VEHICLE WHEELS (making wheels or wheel parts by rolling B21H1/00, by forging, hammering or pressing B21K1/28); CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION

## Abstract

An internally threaded axle tube and spindle assembly, where the spindle can be easily removed for service or replacement. The spindle may have a threaded projection corresponding to the internal threads in the axle tube. The spindle may be screwed into place for use, then unscrewed for service or replacement.

## Claims

### Claim 1

An axle tube assembly comprising:
an axle tube body with:
a first end and a second end; and
internal threads along an interior surface of the axle tube body at the first end and at the second end; and
a bevel along an outer edge of the first end and a bevel along an outer edge of the second end, the bevels oriented such that the axle tube body tapers inward toward the first end and toward the second end;
a spindle assembly removably connected to the first end of the axle tube body and a spindle assembly removably connected to the second end of the axle tube body, where each spindle assembly comprises:
a spindle body;
an exteriorly threaded cylinder extending coaxially outward from the spindle body, where the internal threads of the axle tube body correspond to the exteriorly threaded cylinder such that the spindle body is capable of being secured to the axle body by screwing the exteriorly threaded cylinder into the axle tube body;
a bevel along an outer edge of the spindle body adjacent the exteriorly threaded cylinder, the bevel oriented such that the spindle body tapers inward toward the outer edge and the bevel forms a V with the bevel of the axle tube body; and
a removable weld in the V formed by the bevel of the spindle body and the bevel of the axle tube body, such that the weld directly connects the spindle body to the axle tube body, where the weld is removable by grinding.

### Claim 2 (depends on 1)

The axle tube assembly of claim 1 where the spindle body has a threaded end, where the exteriorly threaded cylinder extends from the spindle body opposite the threaded end.

### Claim 3 (depends on 2)

The axle tube assembly of claim 2 where the spindle body comprises:
a first bearing journal adjacent the threaded end;
a spacer adjacent the first bearing journal;
a second bearing journal adjacent the spacer; and
a collar adjacent the second bearing journal, where the exteriorly threaded cylinder is adjacent the collar;
where the threaded end, the first bearing journal, the spacer, the second bearing journal, the collar, and the exteriorly threaded cylinder are coaxial.

### Claim 4 (depends on 3)

The axle tube assembly of claim 3 where the threaded end, the first bearing journal, the spacer, the second bearing journal, the collar, and the exteriorly threaded cylinder have an axial bore therethrough.

### Claim 5 (depends on 1)

The axle tube assembly of claim 1 further comprising a collar, where the exteriorly threaded cylinder is adjacent the collar.

### Claim 6 (depends on 5)

The axle tube assembly of claim 5 where the collar has a flange and where the flange has a diameter generally the same as a diameter of the axle tube body.