Patent US3855732A successfully refreshed from Google Patents.
US3855732A
Expired / Lapsed
US
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Threshold strip for sliding doors having replaceable bearing track
Assignee: ROLLYSON ALUMINUM PROD
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Filing: 1973-10-15
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Granted: 1974-12-24
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Expires: 1993-10-15
Abstract
Abstract A threshold strip for sliding doors having bearing tracks for supporting and guiding the doors, the tracks being removable and replaceable.
Inventors
- 👤 J Sheaf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:31
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/54; E06B3/58; E06B3/62; E05; E05D; E05D15/00; E05D15/06; E05D15/0621; E05D15/066; E05D15/0686; E06B3/32; E06B3/34; E06B3/42; E06B3/46; E06B3/4609; E05Y; E05Y2201/00; E05Y2201/60; E05Y2201/622; E05Y2201/684; E05Y2800/00; E05Y2800/20; E05Y2800/205; E05Y2800/242; E05Y2800/67; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; E06B2003/6217; E06B2003/6229; E06B2003/6238; E06B2003/6244; E06B2003/625; E06B2003/6258
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
175 words
A threshold strip for supporting a sliding door comprising a longitudinally extending body with side edges having a longitudinally extending upwardly-opening track-receiving groove formed therein intermediate the side edges, a track removably mounted on said body, a longitudinally extending depending tongue on said track so shaped relative to the groove that it can be slipped downwardly into the groove to be retained therein by friction or be withdrawn upwardly out of the groove for removal, a longitudinally extending support portion on said track above said tongue with a longitudinally extending bearing surface at its upper edge, in which the groove is of substantially U-form in transverse cross-section and the depending tongue is of cooperating similar cross-section so that it can be slipped downwardly into the groove or be pulled upwardly therefrom, and including longitudinally extending support flanges on the track at a level between the depending tongue and the support portion and extending laterally outwardly in opposite directions to provide support surfaces which rest on the strip body at opposite sides of the groove therein.
Claim 2
Dependent Claim
175 words
A threshold strip for supporting a sliding door comprising a longitudinally extending body with side edges having a longitudinally extending upwardly-opening track-receiving groove formed therein intermediate the side edges, a track removably mounted on said body, a longitudinally extending depending tongue on said track so shaped relative to the groove that it can be slipped downwardly into the groove to be retained therein by friction or be withdrawn upwardly out of the groove for removal, a longitudinally extending support portion on said track above said tongue with a longitudinally extending bearing surface at its upper edge, in which the groove is of substantially U-form in transverse cross-section and the depending tongue is of cooperating similar cross-section so that it can be slipped downwardly into the groove or be pulled upwardly therefrom, and including longitudinally extending support flanges on the track at a level between the depending tongue and the support portion and extending laterally outwardly in opposite directions to provide support surfaces which rest on the strip body at opposite sides of the groove therein.
Claim 3
Dependent Claim
108 words
A threshold strip according to claim 1 in which said threshold strip and track are both of metal and in which said flanges have their support surfaces located at a selected level so that the lower edge of the tongue will not contact with the bottom of the groove when said support surfaces engage the body and said tongue being of a width less than that of the groove to provide a U-shape space between the tongue and the groove, and a non-metallic channel member in said U-shape space fitting upwardly around the depending tongue beneath said support flanges and engaging the sides and bottom of the groove.
Claim 4
Dependent Claim
59 words
A threshold strip according to claim 2 in which the removable track is a metal extrusion with the support portion having the bearing surface provided by a rib at its upper edge which projects laterally outwardly from the support portion, said flanges being also formed on said support portion and laterally projecting therefrom at a level below said rib.
Claim 5
Dependent Claim
40 words
In combination with the threshold strip of claim 3, a door slidably mounted thereon by means including support rollers which rest on said bearing rib, said rollers being grooved and fitTing over a transversely curved upper edge on said rib.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |