Patent US4404770A successfully refreshed from Google Patents.
US4404770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sliding door construction for closing an opening in a wall
Assignee: Markus Hermetische Deuren BV
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Filing: 1981-05-05
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Granted: 1983-09-20
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Expires: 2001-05-05
Abstract
Abstract A sliding door construction including a door provided with rollers at its upper edge, which rollers are supported for rolling along a V-shaped portion of a guide rail having recesses adjacent the locations of the rollers in the closed position of the door for moving the door slightly downwards and towards the wall just before reaching its closed position. The guide rail is provided at one block for arresting the sliding movement of the door and a detachable cover for concealing the rollers and the upper edge of the door from view.
Inventors
- 👤 Jan J. G. Markus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:28
CPC Classifications
E; E05; E05D; E05D15/00; E05D15/06; E05D15/10; E05D15/1021; E05F; E05F5/00; E05F5/003; E05D15/1042; E05D2015/1055; E05Y; E05Y2201/00; E05Y2201/60; E05Y2201/622; E05Y2201/638; E05Y2201/684; E05Y2800/00; E05Y2800/26; E05Y2800/298; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
174 words
A sliding door construction for closing an opening in a wall, which door construction comprises: (a) a door; (b) a guide rail having a longitudinal V-shaped portion; (c) a plurality of rollers carried by the upper edge of the door and disposed in the V-shaped portion for supporting the door on the guide rail for sliding movement along a plane parallel to and spaced from the wall; (d) the V-shaped portion including recesses for engaging the rollers to move the door downwardly and towards the wall into a closed position; (e) the upper edge of the door including a first C-shaped slot; (f) a plurality of bolts, each bolt including a shaft portion and a head portion, with the head portions being disposed in the first C-shaped slot and the rollers being rotatably mounted on the shaft portions; (g) at least one ball bearing carried by the upper edge of the door; and (h) means carried by the guide rail and engageable by the ball bearing for arresting the sliding movement of the door.
Claim 2
Dependent Claim
174 words
A sliding door construction for closing an opening in a wall, which door construction comprises: (a) a door; (b) a guide rail having a longitudinal V-shaped portion; (c) a plurality of rollers carried by the upper edge of the door and disposed in the V-shaped portion for supporting the door on the guide rail for sliding movement along a plane parallel to and spaced from the wall; (d) the V-shaped portion including recesses for engaging the rollers to move the door downwardly and towards the wall into a closed position; (e) the upper edge of the door including a first C-shaped slot; (f) a plurality of bolts, each bolt including a shaft portion and a head portion, with the head portions being disposed in the first C-shaped slot and the rollers being rotatably mounted on the shaft portions; (g) at least one ball bearing carried by the upper edge of the door; and (h) means carried by the guide rail and engageable by the ball bearing for arresting the sliding movement of the door.
Claim 3
Dependent Claim
19 words
The door construction of claim 1 wherein the ball bearing is supported on the shaft portion of a bolt.
Claim 4
Dependent Claim
42 words
The door construction of claim 1 further including at least one extension pin, the guide rail including at least one longitudinal recess, and wherein the extension pin may be inserted within corresponding longitudinal recesses of adjacent guide rails for coupling same together.
Claim 5
Dependent Claim
25 words
The door construction of claim 1 further including a detachable cover for concealing the guide rail, the rollers and the upper edge of the door.
Claim 6
Dependent Claim
19 words
The door construction of claim 4 further including resilient means for detachably securing the cover to the guide rail.
Claim 7
Dependent Claim
23 words
The door construction of claim 4 wherein the cover includes at least one bent section for enclosing an end of the guide rail.
Claim 8
Dependent Claim
18 words
The door construction of claim 1 wherein the arresting means includes at least one block of resilient material.
Claim 9
Dependent Claim
22 words
The door construction of claim 7 wherein the block of resilient material includes an oblique side for engagement by the ball bearing.
Claim 10
Dependent Claim
21 words
The door construction of claim 7 wherein the block of resilient material includes a recess for engagement by the ball bearing.
Claim 11
Dependent Claim
29 words
The door construction of claim 7 wherein the guide rail further includes a second C-shaped slot and the block of resilient material is disposed within the second C-shaped slot.
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) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |