US3689017A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Props
Assignee: A R I PROPAFLOR Ltd
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Filing: 1970-12-14
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Granted: 1972-09-05
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Expires: 1990-12-14
Abstract
Abstract A prop for supporting floor panels comprising a base plate from which upstands a shank carrying at its upper end a head plate to receive the load. The shank and the base plate have a spigot and socket connection such that by turning the vertical axis of the base plate, the head plate is caused to gyrate and the plane of its load bearing surface to take up any desired inclination to the horizontal.
Inventors
- 👤 Ronald William Stanley Harvey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:41
CPC Classifications
E; E21; E21D; E21D15/00; E21D15/02; E04; E04F; E04F15/00; E04F15/02; E04F15/024; E04F15/02447; E04F15/02464; E04F15/0247; E04F15/02482; E21D15/48; E21D15/50; E21D15/54
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
209 words
A prop for supporting floor panels comprising: a base plate having a lower support surface on which said prop rests, a shank upstanding from said base plate, said shank having an upper end, a head plate having a top surface designed tO support said floor panels, said head plate being connected to said upper end of said shank; a spigot and socket connection positioned between said base plate and said head plate for altering the plane of said top surface of said head plate relative to the plane of said lower support surface of said base plate by rotation of said shank relative to at least one of said plates, said spigot and socket connection comprising a male truncated cone having an angle of convergence Alpha and a corresponding female truncated cone also having an angle of convergence Alpha , said male truncated cone rotatably fitting within said female truncated cone, said male and female cones being arranged so that their axes make acute angles with the upright axis of said shank; whereby, when said lower support surface rests on a surface not parallel to said floor panel, said spigot can be rotated relative to said socket to bring said plane of said head plate parallel to said floor.
Claim 2
Dependent Claim
209 words
A prop for supporting floor panels comprising: a base plate having a lower support surface on which said prop rests, a shank upstanding from said base plate, said shank having an upper end, a head plate having a top surface designed tO support said floor panels, said head plate being connected to said upper end of said shank; a spigot and socket connection positioned between said base plate and said head plate for altering the plane of said top surface of said head plate relative to the plane of said lower support surface of said base plate by rotation of said shank relative to at least one of said plates, said spigot and socket connection comprising a male truncated cone having an angle of convergence Alpha and a corresponding female truncated cone also having an angle of convergence Alpha , said male truncated cone rotatably fitting within said female truncated cone, said male and female cones being arranged so that their axes make acute angles with the upright axis of said shank; whereby, when said lower support surface rests on a surface not parallel to said floor panel, said spigot can be rotated relative to said socket to bring said plane of said head plate parallel to said floor.
Claim 3
Dependent Claim
29 words
A prop according to claim 1 wherein said male and female truncated cones are arranged so that their axes make said angle Alpha with upright axes of said shank.
Claim 4
Dependent Claim
21 words
A prop according to claim 1 wherein said spigot and socket connection is positioned between said base plate and said shank.
Claim 5
Dependent Claim
22 words
A prop according to claim 1 comprising upright adjusting means for adjusting the distance between said base plate and said head plate.
Claim 6
Dependent Claim
32 words
A prop according to claim 3 which comprises an annular rib provided on said shank, said rib having a lower bearing surface designed to support said shank on said female truncated cone.
Claim 7
Dependent Claim
66 words
A prop according to claim 4 wherein said shank includes an upper part, a threaded length of said upper part, a lower part connected to said male truncated cone, an internal threaded length on said lower part in which said threaded length on said upper part is threaded, whereby the length of said shank can be adjusted by screwing said upper part relative said lower part.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |