Patent EP0148641A2 successfully refreshed from Google Patents.
EP0148641A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Differentials
Assignee: Knight Mechadyne Ltd
•
Filing: 1984-12-28
•
Granted: —
•
Expires: 2004-12-28
Abstract
Abstract A limited slip differential for driving two coaxial shafts (2, 4) comprises a driving gear carrier (6) in which first and second worm members (10C) and (10A) are rotatably mounted on pins (11) parallel to the shafts (2) and (4). The worms (10A and 10C) are extended to form respective helical pinions (24C) und (24A) meshing respectively with helical sun gears (18) and (20) on the shafts (2) and (4). The worms (1 OA) and (10C) both mesh with a worm wheel (12) [mounted on a transverse pin (14) in the carrier (6)] on opposite sides thereof and form a reversible worm drive therewith.
Inventors
- 👤 David John Knight
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 12:06
CPC Classifications
F; F16; F16H; F16H48/00; F16H48/20; F16H48/28; F16H48/29
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
A limited slip differential for a vehicle, comprising: a gear carrier (6) mountable for rotation about an axis (X-X) of the carrier: first and second worm members (10A, 10C) mounted for rotation within the carrier (6) with their axes parallel to the carrier axis (X-X): an idler worm wheel (12) mounted for rotation in the carrier (6) between, and meshing with, helical worm formations on worm portions of both the worm members (10A and 10C), each worm portion'forming a reversible but frictional worm drive with the worm wheel (12); and first and second sun gear wheels (18, 20) coaxial with the carrier axis (X-X) and meshing directly or indirectly with planet pinion portions (24C, 24A) of the respective worm members (10C, 10A).
Claim 2
Dependent Claim
122 words
A limited slip differential for a vehicle, comprising: a gear carrier (6) mountable for rotation about an axis (X-X) of the carrier: first and second worm members (10A, 10C) mounted for rotation within the carrier (6) with their axes parallel to the carrier axis (X-X): an idler worm wheel (12) mounted for rotation in the carrier (6) between, and meshing with, helical worm formations on worm portions of both the worm members (10A and 10C), each worm portion'forming a reversible but frictional worm drive with the worm wheel (12); and first and second sun gear wheels (18, 20) coaxial with the carrier axis (X-X) and meshing directly or indirectly with planet pinion portions (24C, 24A) of the respective worm members (10C, 10A).
Claim 3
Dependent Claim
47 words
A limited slip differential according to claim 1 characterised in that the pinion portion (24) of each worm member (10) is formed as a continuation of the helical worm formation of the worm portion and meshes with correspondingly helical teeth on the respective sun gear wheel (18,20).
Claim 4
Dependent Claim
26 words
A limited slip differential according to claim 1 or 2 characterised in that the helix angle of the helical formations of the worms is substantially 43.1°.
Claim 5
Dependent Claim
55 words
A limited slip differential according to any of claims 1 to 3, characterised in that there are two said first worm members (10A, 10D), two said second worm members (10C, 10B) and two said worm wheels (12 and 16), said worm wheels being mounted for rotation in said casing (6) about a common transverse axis.
Claim 6
Dependent Claim
31 words
A limited slip differential according to claim 4 characterised in that said worm wheels (12 and 16) are rotatably mounted on a common transverse pin (14) with a spacer block therebetween.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.