US3960047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual size lug nut
Assignee: CRAGAR INDUSTRIES Inc
•
Filing: 1974-09-09
•
Granted: 1976-06-01
•
Expires: 1994-09-09
Abstract
Abstract A dual size lug nut for securing an automobile wheel to a hub. From a central head portion of the nut, threaded shanks extend in opposite direction. The two shanks have different threads. Thus the nut may be screwed onto either of two sizes of stud bolts, depending on which end of the nut is threaded onto the bolt. In this way the inventory of parts may be reduced, in that a single type or style of nut will serve alternatively either of two sizes of stud bolts. A cap or plug covers the exposed outward facing bore.
Inventors
- 👤 Fenton A. Liffick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:20
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/14; B; B60; B60B; B60B3/00; B60B3/14; B60B3/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
Dual size nut comprising: a body having a central head portion and axially aligned opposite end portions, said end portions having threaded, axial bores of different thread of the same direction said central head portion extending radially beyond the end portions, and having flats on the exterior thereof circumjacent the axis, whereby the nut may be threaded onto a bolt, screw, or stud of either of two threads to secure a wheel to a hub wherein said end portions have external round surfaces adapted to fit within a bolt hole of said wheel.
Claim 2
Dependent Claim
93 words
Dual size nut comprising: a body having a central head portion and axially aligned opposite end portions, said end portions having threaded, axial bores of different thread of the same direction said central head portion extending radially beyond the end portions, and having flats on the exterior thereof circumjacent the axis, whereby the nut may be threaded onto a bolt, screw, or stud of either of two threads to secure a wheel to a hub wherein said end portions have external round surfaces adapted to fit within a bolt hole of said wheel.
Claim 3
Dependent Claim
49 words
Plurality of nuts in accordance with claim 1, in combination with an automobile hub and wheel, said hub having extending, threaded studs, said wheel having holes mounted on said studs, said nuts being threaded onto said studs with the respective said central portions clamping said wheel to said hub.
Claim 4
Dependent Claim
121 words
Dual size lug nut for securing a wheel to a hub having either of two sizes of stud bolts comprising: a body having a central head portion and axially aligned opposite shank portions, said shank portions being of substantially equal axial lengths and having a common external diameter and threaded axial bores of different diameters, said shank portions being adapted to fit within a bolt hole of the wheel when the nut is threaded onto a stud bolt, the exterior periphery of said head portion extending radially beyond said external diameter and comprising a plurality of wrench-receiving flats, said head portion being adapted to clamp the wheel to the hub when either of said shanks is threaded onto a stud bolt.
Claim 5
Dependent Claim
121 words
Dual size lug nut for securing a wheel to a hub having either of two sizes of stud bolts comprising: a body having a central head portion and axially aligned opposite shank portions, said shank portions being of substantially equal axial lengths and having a common external diameter and threaded axial bores of different diameters, said shank portions being adapted to fit within a bolt hole of the wheel when the nut is threaded onto a stud bolt, the exterior periphery of said head portion extending radially beyond said external diameter and comprising a plurality of wrench-receiving flats, said head portion being adapted to clamp the wheel to the hub when either of said shanks is threaded onto a stud bolt.
Claim 6
Dependent Claim
55 words
Nut in accordance with claim 3 including: a cap comprising, a tubular body having an internal diameter slightly greater than said external diameter and a length slightly greater than the axial length of said shanks, a dome closing one end of said body, and means for securing said cap to either of said shank portions.
Claim 7
Dependent Claim
32 words
Nut in accordance with claim 3 wherein: each of said bores is counterbored to a given diameter, and including a circular plug adapted to be fitted snugly into either of the counterbores.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-01 | 1979-12-01 | 1980-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-01 | 1983-12-01 | 1984-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-01 | 1987-12-01 | 1988-06-01 | $7700.00 | Window Closed / Lapsed |