Patent US3841776A successfully refreshed from Google Patents.
US3841776A
Expired / Lapsed
US
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Trafficable surface for mechanical parking apparatus, ramps lifting platforms or the like
Assignee: Individual
•
Filing: 1973-02-05
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Granted: 1974-10-15
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Expires: 1993-02-05
Abstract
Abstract A trafficable surface for mechanical parking apparatus, ramps, lifting platforms or the like, in which there is provided a plurality of carriers of inverted U-section. Lower margins of the side walls of each carrier are deflected laterally. One deflected margin is of channel form and receives the opposite margin of the adjacent carrier, whereby the carriers are interlocked together.
Inventors
- 👤 K Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:54
CPC Classifications
E; E04; E04H; E04H6/00; E04H6/42
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
A trafficable surface to carry a road vehicle comprising an assembly of substantially similar carriers having substantially similar profile, in which each carrier is of sheet metal and of substantially U-shape, each carrier having a Back wall incorporating at least one upwardly projecting rib which extends the height of the carrier and increases the rigidity of the carrier; downwardly-directed side walls integral with the back wall; and edge strips at the lower edges of the side walls, which edge strips are bent in similar directions, the outwardly directed edge strips of the respective carriers being of channel form and embracing the inwardly-directed edge strips of the adjacent carriers.
Claim 2
Dependent Claim
108 words
A trafficable surface to carry a road vehicle comprising an assembly of substantially similar carriers having substantially similar profile, in which each carrier is of sheet metal and of substantially U-shape, each carrier having a Back wall incorporating at least one upwardly projecting rib which extends the height of the carrier and increases the rigidity of the carrier; downwardly-directed side walls integral with the back wall; and edge strips at the lower edges of the side walls, which edge strips are bent in similar directions, the outwardly directed edge strips of the respective carriers being of channel form and embracing the inwardly-directed edge strips of the adjacent carriers.
Claim 3
Dependent Claim
27 words
The trafficable surface according to claim 1, wherein the side wall of each carrier having the outwardly-directed edge strip is somewhat higher than the other side wall.
Claim 4
Dependent Claim
42 words
The trafficable surface according to claim 1, wherein the channel-form edge strips clamp the other edge strips, each side wall of each carrier defining an acute angle with the vertical channel-carrying side wall being more steeply angled than the other side wall.
Claim 5
Dependent Claim
26 words
The trafficable surface according to claim 3, wherein an edge part of the channel form edge strip is turned over to engage the other edge strip.
Claim 6
Dependent Claim
30 words
The trafficable surface according to claim 3, wherein the angle defined between each side wall of each carrier and the vertical is approximately 15* to 30*, preferably 20* to 25*.
Claim 7
Dependent Claim
95 words
The trafficable surface according to claim 3, wherein the inwardly-directed edge strip of each carrier is tightly embraced by the channel form edge strip of an adjacent carrier, in which the side wall having the channel form edge strip, before assembly, defines a somewhat larger angle with respect to the vertical than the other side wall such that a plurality of carriers connected together by way of the edge strips only, have an upwardly-directed curvature, with the curvature being substantially removed during installation so that the side walls of adjacent carriers press against one another.
Claim 8
Dependent Claim
45 words
The trafficable surface according to claim 1, wherein each carrier is mounted at its ends on a pair of similarly profiled elements, each of which is of substantially Z-form with a substantially vertical back wall and being provided with a flange to support the carriers.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |