Patent US3874258A successfully refreshed from Google Patents.
US3874258A
Expired / Lapsed
US
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Keyed attachment device for vehicle wheels
Assignee: SEMOLA VINCENT J
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Filing: 1973-05-21
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Granted: 1975-04-01
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Expires: 1993-05-21
Abstract
Abstract A nut device used for retaining a wheel to the hub of a vehicle is coded in configuration so as to mate with a particular key member, it being difficult to unfasten the nut without this special key member. The coding of the nut device is implemented by means of a predetermined lobed configuration forming an inner wall of the head portion thereof in conjunction with a post formed in this head portion having a particular shape and dimension. The coding of the nut member head portion is matched by that of the associated key device which can be used to unfasten the nut member.
Inventors
- 👤 Vincent J Semola
- 👤 Kenneth C Droesbeke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:36
CPC Classifications
B; B25; B25B; B25B13/00; B25B13/48; B25B13/485; F; F16; F16B; F16B23/00; F16B23/0007; F16B37/00; F16B41/00; F16B41/005; Y; Y10; Y10S; Y10S411/00; Y10S411/919
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
178 words
A keyed attachment nut for fastening a wheel to the hub of a vehicle, said hub having threaded studs extending therefrom, said nut being operable by a mating key device, said nut comprising: a base portion having a threaded aperture formed therein for engagement with the threaded portion of one of said studs, and a head portion having a top face, said face having a wall formed therein having an inner surface contoured in the form of a plurality of arcuate lobes providing a first predetermined coded configuration and a post formed therein in a second predetermined coded configuration, the spacing between the outer wall of the post and said inner wall surface forming a channel of non-uniform width therebetween, said key device having a wall portion which fits between the wall and post of said head portion in mating engagement with the inner surface of said head portion, said key device further having an aperture formed therein which fits snugly over the head portion post, whereby said key device can be utilized to rotatably drive said nut.
Claim 2
Dependent Claim
178 words
A keyed attachment nut for fastening a wheel to the hub of a vehicle, said hub having threaded studs extending therefrom, said nut being operable by a mating key device, said nut comprising: a base portion having a threaded aperture formed therein for engagement with the threaded portion of one of said studs, and a head portion having a top face, said face having a wall formed therein having an inner surface contoured in the form of a plurality of arcuate lobes providing a first predetermined coded configuration and a post formed therein in a second predetermined coded configuration, the spacing between the outer wall of the post and said inner wall surface forming a channel of non-uniform width therebetween, said key device having a wall portion which fits between the wall and post of said head portion in mating engagement with the inner surface of said head portion, said key device further having an aperture formed therein which fits snugly over the head portion post, whereby said key device can be utilized to rotatably drive said nut.
Claim 3
Dependent Claim
27 words
The combination of claim 1 wherein the base portion is cylindrical and is of a lesser diameter than the head portion, said head portion being frusto-conically shaped.
Claim 4
Dependent Claim
12 words
The combination of claim 1 wherein said post has a frusto-conical shape.
Claim 5
Dependent Claim
20 words
The combination of claim 3 wherein said post is located in the center of the face of the head portion.
Claim 6
Dependent Claim
21 words
The combination of claim 3 wherein said post is offset away from the center of the face of the head portion.
Claim 7
Dependent Claim
12 words
The combination of claim 1 wherein the post has an elliptical shape.
Claim 8
Dependent Claim
12 words
The combination of claim 1 wherein the post has a square shape.
Claim 9
Dependent Claim
12 words
The combination of claim 1 wherein the post has a triangular shape.
References Cited (Backward Citations)
US2338024A
Cited
US3241408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |