Patent US3918215A successfully refreshed from Google Patents.
Patent US4184223A successfully refreshed from Google Patents.
US4184223A
Expired / Lapsed
US
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Sweeper bristle element
Assignee: Individual
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Filing: 1978-05-25
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Granted: 1980-01-22
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Expires: 1998-05-25
Abstract
Abstract A sweeper bristle element adapted for use on a railway roadbed or track cleaner employing a rotating drum with element support means. The sweeper bristle element is comprised of a solid elastomeric stem preferably made of 80 durometer rubber. The stem extends substantially the length of the element and has upper and lower portions. A solid weighting mass forming a forward wearing surface and preferably made from 60 durometer rubber is attached to the lower portion of the stem. The upper portion of the stem engages the element support means and rotation of the drum imparts a centrifugal force on the stem and the knob causing loose material which contacts the element to be driven away from the element. The stem and knob may be reinforced by fabric or spring steel. In a preferred embodiment, the knob and stem form a laminated, integral structure.
Inventors
- 👤 John G. Price
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:45
CPC Classifications
A; A46; A46D; A46D1/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
165 words
A sweeper bristle element adapted for use on a railway roadbed or track cleaner employing a rotating drum with element support means, said sweeper bristle element comprising: (a) a solid one-piece elastomeric stem extending substantially the length of said element, said stem having an upper portion and a lower portion with a forward surface terminating with a flat end portion; and (b) a solid one-piece elastomeric substantially planar knob with a lower flat end portion, said knob being integral with and laminated to said solid elastomeric stem, said knob attached to the forward surface of the lower portion of said stem, said flat end portion of the knob being aligned with said flat end portion of said stem, said knob forming a forward wearing and driving surface whereby said upper portion engages said element support means and rotation of said drum imparts a centrifugal force on said stem and especially said knob, causing loose material which contacts said knob to be driven away from element.
Claim 2
Dependent Claim
165 words
A sweeper bristle element adapted for use on a railway roadbed or track cleaner employing a rotating drum with element support means, said sweeper bristle element comprising: (a) a solid one-piece elastomeric stem extending substantially the length of said element, said stem having an upper portion and a lower portion with a forward surface terminating with a flat end portion; and (b) a solid one-piece elastomeric substantially planar knob with a lower flat end portion, said knob being integral with and laminated to said solid elastomeric stem, said knob attached to the forward surface of the lower portion of said stem, said flat end portion of the knob being aligned with said flat end portion of said stem, said knob forming a forward wearing and driving surface whereby said upper portion engages said element support means and rotation of said drum imparts a centrifugal force on said stem and especially said knob, causing loose material which contacts said knob to be driven away from element.
Claim 3
Dependent Claim
51 words
The sweeper bristle element as claimed in claim 1 wherein said solid elastomeric stem is formed of a first elastomer having an 80 durometer measured on a Shore, type-A, durometer gauge and said knob is formed of a second elastomer having a 60 durometer measured on a Shore, type-A, durometer gauge.
Claim 4
Dependent Claim
21 words
The sweeper bristle element as claimed in claim 2 wherein said first elastomer is a composition blend of rubber and plastic.
Claim 5
Dependent Claim
15 words
The sweeper bristle element as claimed in claim 2 wherein said first elastomer is rubber.
Claim 6
Dependent Claim
21 words
The sweeper bristle element as claimed in claim 2 wherein said second elastomer is a composition blend of rubber and plastic.
Claim 7
Dependent Claim
15 words
The sweeper bristle element as claimed in claim 2 wherein said second elastomer is rubber.
Claim 8
Dependent Claim
38 words
The sweeper bristle element as claimed in claim 1 wherein the lower portion of said stem comprises approximately one-third of the length of said stem and said elastomeric knob extends along the entire length of said lower portion.
Claim 9
Dependent Claim
14 words
The sweeper bristle element as claimed in claim 1 wherein said stem is reinforced.
References Cited (Backward Citations)
US2767526A
Cited
US3015121A
Cited
US3134122A
Cited
US3256545A
Cited
US3353200A
Cited
US3402416A
Cited
US3384915A
Cited
US3871139A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-21 | 1983-07-23 | 1984-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-21 | 1987-07-23 | 1988-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-21 | 1991-07-23 | 1992-01-22 | $7700.00 | Window Closed / Lapsed |