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US3736032A
Expired / Lapsed
US
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Pneumatic drive sprocket for tracked vehicles
Assignee: Uniroyal Inc
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Filing: 1970-01-28
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Granted: 1973-05-29
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Expires: 1990-01-28
Abstract
Abstract A pneumatic drive sprocket for tracked vehicles which includes a belted radial tire casing having radially projecting lugs or teeth disposed in spaced-apart relationship about the circumference of the tire and which are adapted to engage the track for driving purposes. The utilization of such a drive sprocket enables the vehicle to obtain the shock absorbing and flotation characteristics of pneumatic tires while permitting accurate, consistent and positive driving engagement with the track due to the fact that the pitch length between the teeth is not appreciably changed upon contact with the ground because of the essentially circumferentially inextensible nature of the radial belted tire.
Inventors
- 👤 C Mosshart
- 👤 E F Burton
- 👤 W C Macklem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:15
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/18; B62D55/24; B62D55/04; B62D55/12; Y; Y10; Y10S; Y10S474/00; Y10S474/901
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
202 words
A pneumatic drive sprocket for use with a vehicle having an endless track including multiple sprocket openings, comprising; A. a pneumatic radial tire casing, and a circumferentially substantially non-extensible belt disposed in surrounding relationship to the crown region of said casing; B. a circumferential track-contacting member integrally secured to said belted radial pneumatic tire casing in surrounding superimposed relation to said belt; and C. a plurality of rubber teeth 1. provided on said track-contacting member and extending transversely thereof along lines substantially parallel to the axis of rotation of the sprocket, 2. projecting radially of said track-contacting member, 3. spaced from each other circumferentially of said trackcontacting member at a substantially constant pitch length, with the widths of the spaces between said teeth being at least approximately equal to the widths of said teeth, and 4. adapted upon rotation of the sprocket to extend sequentially into the respective sprocket openings of the track for driving engagement with the track; D. the belted radial tire casing construction ensuring that, under normal operating conditions with a track running over the sprocket, the pitch distance between said teeth remains substantially constant throughout the circumference of the sprocket, and throwing off of the track is avoided.
Claim 2
Dependent Claim
202 words
A pneumatic drive sprocket for use with a vehicle having an endless track including multiple sprocket openings, comprising; A. a pneumatic radial tire casing, and a circumferentially substantially non-extensible belt disposed in surrounding relationship to the crown region of said casing; B. a circumferential track-contacting member integrally secured to said belted radial pneumatic tire casing in surrounding superimposed relation to said belt; and C. a plurality of rubber teeth 1. provided on said track-contacting member and extending transversely thereof along lines substantially parallel to the axis of rotation of the sprocket, 2. projecting radially of said track-contacting member, 3. spaced from each other circumferentially of said trackcontacting member at a substantially constant pitch length, with the widths of the spaces between said teeth being at least approximately equal to the widths of said teeth, and 4. adapted upon rotation of the sprocket to extend sequentially into the respective sprocket openings of the track for driving engagement with the track; D. the belted radial tire casing construction ensuring that, under normal operating conditions with a track running over the sprocket, the pitch distance between said teeth remains substantially constant throughout the circumference of the sprocket, and throwing off of the track is avoided.
Claim 3
Dependent Claim
6 words
projecting radially of said track-contacting member,
Claim 4
Dependent Claim
6 words
projecting radially of said track-contacting member,
Claim 5
Dependent Claim
45 words
A drive system for a tracked vehicle having a driven axle, comprising; A. a plurality of wheels each mounted on said axle for rotation therewith; B. an equal number of pneumatic drive sprockets each mounted on a respective one of said wheels and each including
Claim 6
Dependent Claim
45 words
A drive system for a tracked vehicle having a driven axle, comprising; A. a plurality of wheels each mounted on said axle for rotation therewith; B. an equal number of pneumatic drive sprockets each mounted on a respective one of said wheels and each including
Claim 7
Dependent Claim
20 words
a circumferential track-contacting member integraLly secured to said belted radial pneumatic tire casing in surrounding superimposed relationship to said belt,
Claim 8
Dependent Claim
20 words
a circumferential track-contacting member integraLly secured to said belted radial pneumatic tire casing in surrounding superimposed relationship to said belt,
Claim 9
Dependent Claim
165 words
a plurality of rubber teeth a. provided on said track-contacting member and extending transversely thereof along lines substantially parallel to the axis of rotation of the sprocket, b. projecting radially of said track-contacting member, and c. spaced from each other circumferentially of said track-contacting member at a substantially constant pitch length, with the widths of the spaces between said teeth being at least approximately equal to the widths of said teeth; and C. an equal number of endless tracks each including multiple sprocket openings and running over a respective one of said track-contacting members; D. said teeth of each sprocket being adapted, upon rotation of that sprocket, to extend sequentially into the respective sprocket openings of the associated track for driving engagement with the latter; and E. the belted radial tire construction insuring that, under normal operating conditions, the pitch distance between said teeth of each sprocket remains substantially constant throughout the circumference of the sprocket, and throwing off of the associated track is avoided.
Claim 10
Dependent Claim
165 words
a plurality of rubber teeth a. provided on said track-contacting member and extending transversely thereof along lines substantially parallel to the axis of rotation of the sprocket, b. projecting radially of said track-contacting member, and c. spaced from each other circumferentially of said track-contacting member at a substantially constant pitch length, with the widths of the spaces between said teeth being at least approximately equal to the widths of said teeth; and C. an equal number of endless tracks each including multiple sprocket openings and running over a respective one of said track-contacting members; D. said teeth of each sprocket being adapted, upon rotation of that sprocket, to extend sequentially into the respective sprocket openings of the associated track for driving engagement with the latter; and E. the belted radial tire construction insuring that, under normal operating conditions, the pitch distance between said teeth of each sprocket remains substantially constant throughout the circumference of the sprocket, and throwing off of the associated track is avoided.
Claim 11
Dependent Claim
36 words
spaced from each other circumferentially of said track-contacting member at a substantially constant pitch length, with the widths of the spaces between said teeth being at least approximately equal to the widths of said teeth, and
Claim 12
Dependent Claim
36 words
spaced from each other circumferentially of said track-contacting member at a substantially constant pitch length, with the widths of the spaces between said teeth being at least approximately equal to the widths of said teeth, and
Claim 13
Dependent Claim
66 words
adapted upon rotation of the sprocket to extend sequentially into the respective sprocket openings of the track for driving engagement with the track; D. the belted radial tire casing construction ensuring that, under normal operating conditions with a track running over the sprocket, the pitch distance between said teeth remains substantially constant throughout the circumference of the sprocket, and throwing off of the track is avoided.
Claim 14
Dependent Claim
66 words
adapted upon rotation of the sprocket to extend sequentially into the respective sprocket openings of the track for driving engagement with the track; D. the belted radial tire casing construction ensuring that, under normal operating conditions with a track running over the sprocket, the pitch distance between said teeth remains substantially constant throughout the circumference of the sprocket, and throwing off of the track is avoided.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |