US3909076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust seal for endless tracks of a tractor
Assignee: Komatsu Ltd
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Filing: 1973-02-07
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Granted: 1975-09-30
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Expires: 1993-02-07
Abstract
Abstract Dust seal for endless tracks of a tractor having a pin, a first link secured to the pin and having annular recess, a bushing rotatably engaged with the pin and projected at one end into the recess of the first link to form a counter bore portion, and a second link secured to the bushing, which has an annular sealing member of wear resistance and resiliency forming sealing surfaces at both sides thereof with the end surface of the bushing and with the bottom surface of the recess of the first link and having at least one annular thread and contained in the recess of the first link in compressed state. Thus, the dust seal may have good sealing function and may endure thrust.
Inventors
- 👤 Takeshi Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:05
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/3456; B; B62; B62D; B62D55/00; B62D55/08; B62D55/088; B62D55/0887
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
158 words
A dust seal for endless tracks of a tractor comprising a pin, a first link secured to said pin and having annular recess, a bushing rotatably engaged with said pin and projected at one end into the recess of said first link to form a counter bore portion, and a second link secured to said bushing, wherein said first and second links having a space therebetween and an annular unitary sealing means for wear resistance and resiliency having annular side edges and at least one tread positioned in said counter bore portion in a compressed state, the outer edges of said tread forming a seal with said first link and said side edges forming sealing surfaces with the end surface of said bushing and the end of said recess in said first link and for said sealing means maintaining said space and absorbing the thrust force of the bushing in the direction of the axis of the pin.
Claim 2
Dependent Claim
158 words
A dust seal for endless tracks of a tractor comprising a pin, a first link secured to said pin and having annular recess, a bushing rotatably engaged with said pin and projected at one end into the recess of said first link to form a counter bore portion, and a second link secured to said bushing, wherein said first and second links having a space therebetween and an annular unitary sealing means for wear resistance and resiliency having annular side edges and at least one tread positioned in said counter bore portion in a compressed state, the outer edges of said tread forming a seal with said first link and said side edges forming sealing surfaces with the end surface of said bushing and the end of said recess in said first link and for said sealing means maintaining said space and absorbing the thrust force of the bushing in the direction of the axis of the pin.
Claim 3
Dependent Claim
31 words
A dust seal as set forth in claim 1, wherein said sealing means is made of any of urethane rubber, synthetic resin, natural rubber, and metal of wear resistance having resiliency.
Claim 4
Dependent Claim
16 words
A dust seal as set forth in claim 1, wherein said sealing means comprises two threads.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |