Patent US3597017A successfully refreshed from Google Patents.
US3597017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for tensioning an endless track belt
Assignee: YAMAKA HATSUDOKI KK
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Filing: 1969-05-14
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Granted: 1971-08-03
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Expires: 1989-05-14
Abstract
Abstract A tensioning device comprises a bracket attached to the frame of an endless-belt traction vehicle and provided with a slit extending in the lengthwise direction thereof, a pivoting member adjustably secured to the bracket with its body partly inserted into said slit, and means for setting said pivoting member in place by moving said pivoting member along the length of said slit. Said pivoting member extends in a direction perpendicular to the length of said slit and rotatably supports a rear arm for rotatably bearing the rear axle of a wheel or wheels over which the endless track belt is stretched.
Inventors
- 👤 Kenzo Tanaka
- 👤 Yutaka Masaoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:04
CPC Classifications
B; B62; B62D; B62D55/00; B62D55/08; B62D55/30; B62M; B62M27/00; B62M27/02; B62M2027/027
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
226 words
A device for tensioning an endless track belt of a vehicle comprising: a. a bracket attached to the rear portion of a frame of said vehicle and having a vertical wall provided with a slit extending in the lengthwise direction of said frame; b. a pivoting member having a head engageable with one surface of said vertical wall and a body passing through said slit at a right angle: c. an adjusting member supported by the vehicle frame and adjusting the position of said pivoting member along said slit; d. means for rigidly attaching said head of said pivoting member to said vertical wall, said attaching means including a threaded portion formed at the end portion of said body of the pivoting member a nut adjustably screwed to said threaded portion, a washer fitted to said body of the pivoting member and engageable with the other surface of said vertical wall and hollow spacer into which said body of the pivoting member is inserted and clamped between said nut and said washer; e. a rear arm for rotatably bearing at its free end a rear axle of at least one wheel over which an endless track belt is stretched, said rear arm being pivoted on said pivoting member by said hollow spacer; and f. means for urging said rear arm to force said rear axle downward.
Claim 2
Independent Claim
226 words
A device for tensioning an endless track belt of a vehicle comprising: a. a bracket attached to the rear portion of a frame of said vehicle and having a vertical wall provided with a slit extending in the lengthwise direction of said frame; b. a pivoting member having a head engageable with one surface of said vertical wall and a body passing through said slit at a right angle: c. an adjusting member supported by the vehicle frame and adjusting the position of said pivoting member along said slit; d. means for rigidly attaching said head of said pivoting member to said vertical wall, said attaching means including a threaded portion formed at the end portion of said body of the pivoting member a nut adjustably screwed to said threaded portion, a washer fitted to said body of the pivoting member and engageable with the other surface of said vertical wall and hollow spacer into which said body of the pivoting member is inserted and clamped between said nut and said washer; e. a rear arm for rotatably bearing at its free end a rear axle of at least one wheel over which an endless track belt is stretched, said rear arm being pivoted on said pivoting member by said hollow spacer; and f. means for urging said rear arm to force said rear axle downward.
Claim 3
Dependent Claim
43 words
A device characterized substantially in accordance with claim 1, in which there is provided a sliding bearing member consisting of at least one hollow cylinder of ice-repellent and frictionless plastic material interposed between said hollow spacer and a boss of said rear arm.
Claim 4
Dependent Claim
40 words
A device characterized substantially in accordance with claim 1, in which said slit includes an aperture formed at the forward end thereof, said aperture having such a size as to allow the head of the pivoting member to pass therethrough.
Claim 5
Dependent Claim
68 words
A device characterized substantially in accordance with claim 1, in which said means for urging said rear arm comprises a supporting member securely interposed between said nut and spacer with its bore traversed by said body, and a torsional coiled spring member surrounding said body, one end of said spring member being attached to said vehicle frame and the other end thereof being attached to said rear arm.
Claim 6
Dependent Claim
34 words
A device characterized substantially in accordance with claim 4, in which said supporting member is hat-shaped and provided with an annular flange at which the end of said spring member contacts said supporting member.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |