Patent US3690741A successfully refreshed from Google Patents.
US3690741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Eyelet for track driven vehicle
Assignee: First National Bank of Minneapolis
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Filing: 1971-03-29
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Granted: 1972-09-12
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Expires: 1991-03-29
Abstract
Abstract An improved eyelet for track driven vehicles allowing the track to be driven by the teeth of a drive sprocket extending through the eyelet is disclosed. The eyelet includes a head for mounting inside of the track and a hollow body extending from the head through an aperture in the track to fold over the track on the outside and hold the eyelet in the track. The eyelet head includes a set of parallel sides providing sliding support and a set of parallel sides providing guiding support for a slide rail suspension of the track driven vehicle. Further the head is curled back towards the track itself to grip the track. Also disclosed is a washer which may be used with the eyelet of the present invention also to grip the track. The washer may also include traction teeth extending downward from the outside of the track.
Inventors
- 👤 Neil W Pierson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:56
CPC Classifications
B; B62; B62M; B62M27/00; B62M27/02; B62D; B62D55/00; B62D55/06; B62D55/07; B62D55/08; B62D55/18; B62D55/24; B62M2027/026; B62M2027/027
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
199 words
In an eyelet for the track of a slide rail or bogie wheel suspension track driven vehicle having an apertured head for mounting adjacent the inside surface of the track, a hollow body extending from the head through a preformed aperture in the track and allowing a portion of the body extending through the track to be folded over onto the outside surface of the track to hold the eyelet in the track and allow the track to be driven by teeth of a drive sprocket extending through the eyelet, the improvement comprising a head having at least two sets of parallel sides, the first set of parallel sides arranged transversely to the intended direction of motion of the track to provide a slide and wear surface for the slide rail to reduce friction and wear between the slide rail and the track, the second set of parallel sides arranged parallel to the intended direction of motion of the track, raised smoothly from the first set of sides and the head, and spaced apart to provide a guiding action to and around the slide rail to maintain the longitudinal positioning of the track with respect to the slide rail.
Claim 2
Dependent Claim
199 words
In an eyelet for the track of a slide rail or bogie wheel suspension track driven vehicle having an apertured head for mounting adjacent the inside surface of the track, a hollow body extending from the head through a preformed aperture in the track and allowing a portion of the body extending through the track to be folded over onto the outside surface of the track to hold the eyelet in the track and allow the track to be driven by teeth of a drive sprocket extending through the eyelet, the improvement comprising a head having at least two sets of parallel sides, the first set of parallel sides arranged transversely to the intended direction of motion of the track to provide a slide and wear surface for the slide rail to reduce friction and wear between the slide rail and the track, the second set of parallel sides arranged parallel to the intended direction of motion of the track, raised smoothly from the first set of sides and the head, and spaced apart to provide a guiding action to and around the slide rail to maintain the longitudinal positioning of the track with respect to the slide rail.
Claim 3
Dependent Claim
49 words
The eyelet of claim 1, wherein both the first set of parallel sides and the second set of parallel sides are curled towards the track at the outer edges thereof to provide a gripping action of the eyelet to the track when the eyelet is installed in the track.
Claim 4
Dependent Claim
95 words
The eyelet of claim 2 including a body portion having at least four sides, with the ends of each side extending outwardly of the track of a length substantially equal to but slightly greater than the depth of the track and with the center portion of each side of a length greater than the depth of the track to allow the center portions of the sides to be folded outwardly away from the preformed aperture in the track and be curled over, against and into the track to securely hold the eyelet in the track.
Claim 5
Dependent Claim
76 words
The eyelet of claim 3, wherein the body comprises a hollow rectangular parallelepiped having open ends, wherein the inner edges of the first set of parallel sides are joined with the first two parallel sides of the open parallelepiped at the inside end of the body, and wherein the inner edges of the second set of parallel sides are joined with the remaining two parallel sides of the parallelepiped at the inside end of the body.
Claim 6
Dependent Claim
76 words
The eyelet of claim 1, wherein the body comprises a hollow rectangular parallelepiped having open ends, wherein the inner edges of the first set of parallel sides are joined with the first two parallel sides of the open parallelepiped at the inside end of the body, and wherein the inner edges of the second set of parallel sides are joined with the remaining two parallel sides of the parallelepiped at the inside end of the body.
Claim 7
Dependent Claim
75 words
The eyelet of claim 5, further including a washer having a hollow body for allowing the mounting of the washer around and about the body of the eyelet on the outside of the track, the washer including an outside edge curled towards the track so as to grip and continue to grip the track when the sides of the body of the eyelet are folded over the washer to secure the eyelet to the track.
Claim 8
Dependent Claim
38 words
The eyelet and washer of claim 6, wherein the washer includes integrally formed ice or traction teeth extending outwardly from the washer for providing better traction between the track and the terrain over which the snowmobile is propelled.
Claim 9
Dependent Claim
75 words
The eyelet of claim 1, further including a washer having a hollow body for allowing the mounting of the washer around and about the body of the eyelet on the outside of the track, the washer including an outside edge curled towards the track so as to grip and continue to grip the track when the sides of the body of the eyelet are folded over the washer to secure the eyelet to the track.
Claim 10
Dependent Claim
38 words
The eyelet and washer of claim 8, wherein the washer includes integrally formed ice or traction teeth extending outwardly from the washer for providing better traction between the track and the terrain over which the snowmobile is propelled.
Claim 11
Dependent Claim
95 words
The eyelet of claim 1 including a body portion having at least four sides, with the ends of each side extending outwardly of the track of a length substantially equal to but slightly greater than the depth of the track and with the center portion of each side of a length greater than the depth of the track to allow the center portion of the sides to be folded outwardly away from the preformed aperture in the track and be curled over, against and into the track to securely hold the eyelet in the track.
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |