Patent US3834138A successfully refreshed from Google Patents.
US3834138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener
Assignee: Oregon Tool Inc
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Filing: 1972-10-04
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Granted: 1974-09-10
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Expires: 1992-10-04
Abstract
Abstract A fastener for fastening working elements to a flexible carrier belt including a stem with an insertable end portion adapted to fit through aligned slots in a washer and the carrier belt which end is fastened under tension to the working element. The belt, at the location of the slot, is undercut to form a cog like notch and the washer is bowed to fit the notch. The trailing end of the stem is flared so as to mate with the bowed washer which prevents the stem from being pulled through the carrier belt.
Inventors
- 👤 D Gibson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:58
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/83; A01D34/831; A01D19/00; A01D19/12; A01D19/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
228 words
A belt assembly wherein working elements are fastened by rigid fasteners to a flexible V-belt comprising; a flexible Vbelt having semi-circular cog-like notches on the underside extended across the full width of the belt with the apex of the notches located at the approximate neutral axis of the belt, said belt having slots extending from the apex of the notches through to the top side of the belt, bowed semi-circular washers nested in the semi-circular cog-like notches having slots aligned with the slots in the belt and a width covering a substantial portion of the width of the belt at said notches, fastening elements having flat stem portions inserted through the aligned slots in the washers and the flexible belt and having flat flared end portions integral with the stem portions that are larger than the slots in the washers to prevent passage of the fastening elements therethrough, resilient pads on the top side of the belt having slots aligned with the slots in the belt, the stem portions of the fastening elements protruded through the slots in the resilient pads, and fastening means fastening working elements to the protruded stem portions with the resilient pads compressed to place a tension load on the fastening element which is resisted at the interface between the semi-circular bowed washer and the portion of the belt defined by the semi-circular notch.
Claim 2
Dependent Claim
228 words
A belt assembly wherein working elements are fastened by rigid fasteners to a flexible V-belt comprising; a flexible Vbelt having semi-circular cog-like notches on the underside extended across the full width of the belt with the apex of the notches located at the approximate neutral axis of the belt, said belt having slots extending from the apex of the notches through to the top side of the belt, bowed semi-circular washers nested in the semi-circular cog-like notches having slots aligned with the slots in the belt and a width covering a substantial portion of the width of the belt at said notches, fastening elements having flat stem portions inserted through the aligned slots in the washers and the flexible belt and having flat flared end portions integral with the stem portions that are larger than the slots in the washers to prevent passage of the fastening elements therethrough, resilient pads on the top side of the belt having slots aligned with the slots in the belt, the stem portions of the fastening elements protruded through the slots in the resilient pads, and fastening means fastening working elements to the protruded stem portions with the resilient pads compressed to place a tension load on the fastening element which is resisted at the interface between the semi-circular bowed washer and the portion of the belt defined by the semi-circular notch.
Claim 3
Dependent Claim
221 words
A belt assembly wherein working elements are fastened by rigid fasteners to a flexible belt comprising; a flexible belt having cog-like notches on the underside with the apex of the notches located at the approximate neutral axis of the belt, said belt having slots extending from the apex of the notches through to the top side of the belt, pre-bowed resilient washers forming a normal radius of curvature nested in the cog-like notches having slots aligned with the slots in the belt, fastening elements having flat stem portions inserted through the aligned slots in the washers and the flexible belt and having flat semi-circular flared end portions integral with the stem portions that are larger than the slots in the washers to prevent passage of the fastening elements therethrough and having a greater radius of curvature than the normal radius of curvature of the washer, resilient pads on the top side of the belt having slots aligned with the slots in the belt, the stem portions of the fastening elements protruded through the slots in the resilient pads, and fastening means fastening working elements to the protruded stem portions with the resilient pads compressed to place a tension load on the fastening elements and thereby achieve an interference fit with the bowed washer forced over the flared end of the stem.
Claim 4
Dependent Claim
221 words
A belt assembly wherein working elements are fastened by rigid fasteners to a flexible belt comprising; a flexible belt having cog-like notches on the underside with the apex of the notches located at the approximate neutral axis of the belt, said belt having slots extending from the apex of the notches through to the top side of the belt, pre-bowed resilient washers forming a normal radius of curvature nested in the cog-like notches having slots aligned with the slots in the belt, fastening elements having flat stem portions inserted through the aligned slots in the washers and the flexible belt and having flat semi-circular flared end portions integral with the stem portions that are larger than the slots in the washers to prevent passage of the fastening elements therethrough and having a greater radius of curvature than the normal radius of curvature of the washer, resilient pads on the top side of the belt having slots aligned with the slots in the belt, the stem portions of the fastening elements protruded through the slots in the resilient pads, and fastening means fastening working elements to the protruded stem portions with the resilient pads compressed to place a tension load on the fastening elements and thereby achieve an interference fit with the bowed washer forced over the flared end of the stem.
References Cited (Backward Citations)
US1016798A
Cited
US1402560A
Cited
US1666783A
Cited
US1849406A
Cited
US3651626A
Cited
US3699757A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |