IP Library Granted Patent US 12,590,629
Granted Patent B2
US 12,590,629 · App. 18/734,251 · Granted Mar 31, 2026

Differential housing

Inventors: Kyle G. Tucker (Sherrills Ford, NC); Jeffery D. Horton (Troutman, NC); Christopher R. Stein-Martin (Mooresville, NC); Rodney M. Sanderson (Cleveland, NC)
Assignee: QA1 Precision Products, Inc.
F16H57/037F16H48/08
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Quick Facts
Patent No.
US 12,590,629
App. No.
18/734,251
Granted
Mar 31, 2026
Kind
B2
Abstract

Present embodiments relate to a differential case. More specifically, but without limitation, present embodiments relate to a differential case which will function with differential components of two sizes and a rear axle housing of a different intended size.

Claims (32)

1 . A rear drivetrain assembly, comprising:

a rear differential case having a body with a first end configured for orientation toward a drive shaft and a second end configured for orientation toward a rear axle;

an opening at said first end and defining a first axis;

a flange disposed at said second end of said body;

bearing cap mounts which extend from the second end beyond the flange;

differential components operably positioned at said bearing cap mounts and located at least partially within said body, said differential components also configured to be axially aligned for operation within a rear axle housing wherein said differential components are of a first size and said rear axle housing are intended for use with differential component of a second size different than said first size;

a bolt pattern on said flange, said bolt pattern configured to be coupled to said rear axle housing despite the body having said differential components of a different size than intended for said rear axle housing; and

a bearing disposed in each of said bearing cap mounts, each said bearing supporting said differential components;

said bearings defining a bearing axis, wherein said first axis is disposed lower than said bearing axis.

2 . The rear drivetrain assembly of claim 1 , said differential components comprising a 8.8 inch ring gear.

3 . The rear drivetrain assembly of claim 2 , said rear axle housing being sized for a 9 inch ring gear.

4 . The rear drivetrain assembly of claim 3 , said 8.8 inch ring gear aligned within said rear axle housing.

5 . The rear drivetrain assembly of claim 1 , further comprising a pinion gear disposed within said rear differential case.

6 . The rear drivetrain assembly of claim 1 , further comprising bearing caps positioned on said bearing cap mounts.

7 . A rear drivetrain assembly, comprising:

a differential case intended for use with components of a first size;

a rear axle housing intended for use with components of a second size, said differential case having a flange and bolt pattern for use with said rear axle housing of said second size different than said components of said first size;

said differential case connected to said rear axle housing wherein said components are at least partially located within said rear axle housing such that said components are positioned in operable alignment for use within said rear axle housing;

said differential case having an opening at one end and defining a first axis; and

bearings seated in said differential case, said bearings defining a second axis that is transverse to said first axis and at a higher elevation than said first axis.

8 . The rear drivetrain assembly of claim 7 , further comprising bearing mounts within said differential case and bearing caps connected to said bearing mounts when said bearings are seated in said bearing mounts.

9 . The rear drivetrain assembly of claim 7 , further comprising a pinion gear shaft in said opening of said differential case.

10 . The rear drivetrain assembly of claim 7 , said bearings being axially aligned with lateral portions of said rear axle housing.

11 . The rear drivetrain assembly of claim 7 , said components comprising an 8.8 inch ring gear.

12 . The rear drivetrain assembly of claim 11 , said rear axle housing being formed for use with a 9 inch ring gear.

13 . The rear drivetrain assembly of claim 7 , said differential case having said flange and hole pattern configured for use with said rear axle housing of said second size.

14 . A method of installing a differential case and rear axle housing, comprising the steps of:

providing said differential case with components of a first size and a flange and hole pattern in said flange associated with a second size;

providing a rear axle housing sized for use with components of said second size, different than said first size; and

connecting said differential case to said rear axle housing wherein said components are operably positioned within said rear axle housing such that an axis of a ring gear is aligned with lateral portions of said rear axle housing and a first axis defined by a hole in said differential case is lower than a second axis of said components.

15 . The method of claim 14 , said components comprising bearings and said ring gear.

16 . The method of claim 14 , further comprising positioning a pinion gear shaft in said hole in said differential case.

Assignments (3)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 3, 2025
From: HOLLEY PERFORMANCE PRODUCTS INC.
To: QA1 PRECISION PRODUCTS, INC.
Reel/Frame 070722/0023 →
RECEIVING PARTY DATA CHANGE OF ADDRESS Recorded Jan 2, 2025
From: HOLLEY PERFORMANCE PRODUCTS, INC.
To: HOLLEY PERFORMANCE PRODUCTS, INC.
Reel/Frame 069813/0457 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 24, 2024
From: TUCKER, KYLE G.; HORTON, JEFFERY D.; STEIN-MARTIN, CHRISTOPHER R.; SANDERSON, RODNEY M.
To: HOLLEY PERFORMANCE PRODUCTS, INC.
Reel/Frame 069031/0856 →
Continuity (3)
Continuation 17869396 · Jul 20, 2022
Provisional Application 63224518 · Jul 22, 2021
Related Publication 20240318714A1 · Sep 26, 2024
References Cited (11)
US 1417426A · Torgensen · 1922 [cited by applicant]
US 1846187A · Coulter · 1932 [cited by applicant]
US 7789584B2 · Frankovich · 2010 [cited by examiner]
US D717216S · Dunn et al. · 2014 [cited by applicant]
US 12007015B2 · Tucker · 2024 [cited by examiner]
US 20150087461A1 · Jackson · 2015 [cited by examiner]
AU 2022206796A1 · 2023 [cited by applicant]
Chris Alstons, Chassisworks 8.8 third member, Sep. 21, 2021 (Year: 2021). [cited by applicant]
www.Strangeengineering.net (ford 9″ product with HD pro alum center and the HK pro aluminum differential and a specification pdf therefo) (Year: 2017). [cited by applicant]
Yukon gear and axle third member, https://www.summitracing.com/parts/yga-32138, (Year: 2017). [cited by applicant]
U.S. Appl. No. 63/224,518, filed Jul. 22, 2021 titled Differential Housing. [cited by applicant]