Resilient tires and wheels – Tires – resilient – Anti-skid devices
Patent
1991-01-18
1993-06-22
Ball, Michael W.
Resilient tires and wheels
Tires, resilient
Anti-skid devices
152210, 156114, 36 61, B60C 1116, A43C 1514
Patent
active
052213790
ABSTRACT:
A stud for a tire to improve traction on a roadway which includes a hardened pin mounted in a steel jacket and extending therefrom to engage the roadway, wherein the stud is sized for insertion into openings in the tire tread. The pin is retractable into the jacket thereby removing the pin from contact with the road surface and providing non-studded as well as studded service from the same tire. A spring in the stud jacket is used to propel the pin out of the jacket into the extended position when the pin is released from the securing mechanism. The securing mechanism consists of a series of projections on the pin in interaction with a series of grooves in the interior of the stud jacket. The pin is released from the retracted position by manually pressing the pin further into the jacket until the securing mechanism releases it. The spring also acts to ensure that the pin protrudes the proper distance, when in contact with the roadway, from the surface of the tire by providing less force than necessary to keep the pin extended when the pin is extended more than the proper distance and more force than necessary when the pin is extended less than the proper distance. This self adjusting feature of the spring may be necessary to keep the optimum pin extension due to the differences in the wear rate of the pin and the tire tread due to the pin being retracted for prolonged periods of time. The pin is retracted into the jacket manually by pressing the pin back into the jacket until the securing mechanism locks into place.
REFERENCES:
patent: 1307208 (1919-06-01), Muntz
patent: 1361078 (1920-12-01), Lynn
patent: 3889735 (1975-06-01), Salakari
patent: 4619301 (1986-10-01), Hiroki
patent: 4838329 (1989-06-01), Ohuchi
patent: 4844137 (1989-07-01), Finarsson
patent: 4883104 (1989-11-01), Minami
Ball Michael W.
Lorin Francis J.
LandOfFree
Retractable tire stud does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Retractable tire stud, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Retractable tire stud will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1439032