Patent US3638503A successfully refreshed from Google Patents.
US3638503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dust boot for tread brake units
Assignee: Westinghouse Air Brake Co
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Filing: 1969-10-03
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Granted: 1972-02-01
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Expires: 1989-10-03
Abstract
Abstract A split- or seam-type cone-shaped replaceable dust boot for surrounding the brake rod of a tread brake assembly wherein the boot is disposed in surrounding relation to the brake rod so as to be readily removable and replaceable without disassembly or removal of the associated brake assembly parts. This seam-type dust boot is installed in surrounding relation to the brake rod while the edges of the split seam are separated, following which these edges are secured together in a sealed relationship by overlapping and interlocking ribs on the mating edges. If desired, a slide-fastener element may be employed to effectuate the interlocking of the ribs on the mating edges.
Inventors
- 👤 Joseph G Stipanovic
- 👤 Earl E Allan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:37
CPC Classifications
F; F16; F16D; F16D49/00; B; B61; B61H; B61H13/00; B61H13/34; F16J; F16J3/00; F16J3/04; F16J3/041; F16J3/045; Y; Y10; Y10S; Y10S24/00; Y10S24/30; Y10S24/38; Y10S24/39; Y10T; Y10T24/00; Y10T24/45; Y10T24/45152; Y10T74/00; Y10T74/21; Y10T74/219
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
160 words
A hollow truncated cone-shaped resilient boot having two opposing ends and a radially outwardly extending flange at each of said ends, wherein the improvement comprises: A. the development of said hollow truncated cone-shaped boot constitutes a sheet of material perimetrically defined by said two opposing ends and a pair of opposing edges each having a tab disposed as an extension of the respective edge and extending through said flange on one of said ends, and b. releasable locking spaced-apart ribs on each of said opposing edges terminating at one end at the exterior end of the corresponding tab and at the opposite end adjacent the flange at the other of said pair of ends, said ribs on each of said opposing edges movable into releasable interlocking engagement with said ribs on the other opposing edge to form said hollow truncated cone-shaped boot and comprise a seam extending from one of said opposing ends to the other and through said flanges.
Claim 2
Dependent Claim
160 words
A hollow truncated cone-shaped resilient boot having two opposing ends and a radially outwardly extending flange at each of said ends, wherein the improvement comprises: A. the development of said hollow truncated cone-shaped boot constitutes a sheet of material perimetrically defined by said two opposing ends and a pair of opposing edges each having a tab disposed as an extension of the respective edge and extending through said flange on one of said ends, and b. releasable locking spaced-apart ribs on each of said opposing edges terminating at one end at the exterior end of the corresponding tab and at the opposite end adjacent the flange at the other of said pair of ends, said ribs on each of said opposing edges movable into releasable interlocking engagement with said ribs on the other opposing edge to form said hollow truncated cone-shaped boot and comprise a seam extending from one of said opposing ends to the other and through said flanges.
Claim 3
Dependent Claim
46 words
A hollow truncated cone-shaped flexible boot, as recited in claim 12, further characterized in that one-half the width of said tabs is substantially twice the thickness of the other half, and said one-half of said tab width includes parallel grooves forming therebetween said plurality of ribs.
Claim 4
Dependent Claim
56 words
A hollow truncated cone-shaped flexible boot, as recited in claim 2, further characterized by a slide-fastener element movable in one direction to effect interlocking engagement of the ribs on one of said edges with the ribs on the other edge and movable in the opposite direction to effect disengagement of said ribs on said respective edges.
Claim 5
Dependent Claim
33 words
A hollow truncated cone-shaped flexible boot, as recited in claim 2, further characterized in that the height of said ribs is substantially equal to the thickness of said other half of said tabs.
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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |