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US3726569A Expired / Lapsed US ⏱️ 0.0 years remaining

Pin fastening for segmented snowmobile tracks

Assignee: JP Stevens and Co Inc
•
Filing: 1971-08-18
•
Granted: 1973-04-10
•
Expires: 1991-08-18
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Abstract

Abstract Segmented snowmobile tracks of elastomeric segments with mating hollow elements on both transverse edges of each segment held together with a pin, such as a steel pin, are provided with positive rigid pin locking means at one or both ends of the hollow segment, the locking means being in the form of rigid elements against which one or both ends of the pin abut. For snowmobile tracks these can be metal inserts which can be forced into the end of the hollow member. The insert may be on one end only, in which case the other end of the hollow hinge member is provided with a small hole which is much smaller than the crosssection of the pin but permits insertion of a suitable tool to drive the pin out. For larger vehicles, such as tracks on trucks and the like, there should be positive stops, such as through bolts on both ends. In the case of a snowmobile track there is sufficient resilience in the elastomer so that the pin can be driven out with a hammer and drift when repair of track segments is necessary.

Inventors

  • 👤 R Maglio
  • 👤 A Peterson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 19:22
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/18; B62D55/20; B62D55/205; B62D55/24; B65; B65G; B65G2207/00; B65G2207/12

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 108 words
In a segmented elastomeric track for a tracked vehicle in which the transverse edges of the segments are provided with integral, hollow, mating members and pinned together with pins, the improvement which comprises, a. pins slightly shorter than the transverse width of the track segment, and b. stopping elements contacting the ends of the pins and anchored in the segments, the stopping elements being rigid plugs having diameters at their ends approximating the diameter of the hollow mating member and provided with a rigid portion of larger diameter and having steep sides, which plug on insertion deforms the elastomer of the segment, forming therein a deep, steep-sided groove.
Claim 2
Dependent Claim 108 words
In a segmented elastomeric track for a tracked vehicle in which the transverse edges of the segments are provided with integral, hollow, mating members and pinned together with pins, the improvement which comprises, a. pins slightly shorter than the transverse width of the track segment, and b. stopping elements contacting the ends of the pins and anchored in the segments, the stopping elements being rigid plugs having diameters at their ends approximating the diameter of the hollow mating member and provided with a rigid portion of larger diameter and having steep sides, which plug on insertion deforms the elastomer of the segment, forming therein a deep, steep-sided groove.
Claim 3
Dependent Claim 62 words
A track according to claim 1, and particularly adaptable for snowmobile purposes, in which the rigid plug is a cylinder of diameter about the same as that of the hollow mating member and a central wedge-shaped flange, the plug being insertable by hammering and when hammered in deforming the plastic of the segment, the wedge-shaped flange forming the deep, steep-sided groove therein.
Claim 4
Dependent Claim 28 words
A track according to claim 2 in which the cylinder is of metal sufficiently rigid to deform the plastic when hammered in to form the deep, steep-sided groove.

References Cited (Backward Citations)

US1975107A Cited
GB396187A Cited
US2368611A Cited
US2435194A Cited
US2481727A Cited
US2911091A Cited
US3036695A Cited
US3602364A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-04-09 1976-10-09 1977-04-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-04-09 1980-10-09 1981-04-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-04-09 1984-10-09 1985-04-10 $7700.00 Window Closed / Lapsed

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