Patent US4439052A successfully refreshed from Google Patents.
US4439052A
Expired / Lapsed
US
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Device for coupling together laterally directed scaffold elements to uprights in a scaffold or the like
Assignee: WALLTHER ENGINEERING AB
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Filing: 1980-10-15
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Granted: 1984-03-27
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Expires: 2000-10-15
Abstract
Abstract A device for coupling together laterally directed scaffold elements (11) and uprights in a scaffold (12) or the like. Each coupling device (1) includes an engagement member (2) which is connected to the upright and is open upwards at least in the position of use. Said member is provided with a wall (6) which extends with spacing from the upright and which delimits a space (4) situated between the upright and the wall. A hook-shaped member (9) is situated at least at one end of said scaffold element (11) and is adapted to hook into the engagement member. A first clamping member (14) is movable in relation to the scaffold member and is adapted to bear against the upright and the engagement member. A second clamping member (22/31) is adapted, in a locking position to be forcibly gripped between the first clamping member and the scaffold element. Thereby the clamping member is pressed towards the upright (3) and the scaffold element (11) is pressed in the direction out from the upright and as a result is clamped by means of the hook-shaped member (9) in the engagement member (2).
Inventors
- 👤 Harry Wallther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:47
CPC Classifications
E; E04; E04G; E04G7/00; E04G7/30; E04G7/302; E04G7/306; E04G7/307; F; F16; F16B; F16B7/00; F16B7/22; Y; Y10; Y10T; Y10T403/00; Y10T403/30
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
207 words
A device for coupling together laterally directed scaffold elements and uprights in a scaffold or the like, each coupling device including an engagement member which is connected to the upright and is open upwards at least in the position of use, said engagement member having a wall which extends with spacing from the upright and which defines a space situated between the upright and the wall, a hook-shaped member which is situated at least at one end of said scaffold element and which is adapted to hook into said engagement member, a first clamping member which is movable in relation to the scaffold element and which comprises at least one clamping surface, said first clamping member being arranged with at least said one clamping surface to bear against the upright, and a second clamping member which is adjustable between a release position and a locking position and which is adapted, in the locking position, to be forcibly gripped between said first clamping member and said scaffold element so that said first clamping member is pressed towards the upright and the scaffold element is pressed in the direction out from the upright and as a result is clamped by means of said hook-shaped member in the engagement member.
Claim 2
Independent Claim
207 words
A device for coupling together laterally directed scaffold elements and uprights in a scaffold or the like, each coupling device including an engagement member which is connected to the upright and is open upwards at least in the position of use, said engagement member having a wall which extends with spacing from the upright and which defines a space situated between the upright and the wall, a hook-shaped member which is situated at least at one end of said scaffold element and which is adapted to hook into said engagement member, a first clamping member which is movable in relation to the scaffold element and which comprises at least one clamping surface, said first clamping member being arranged with at least said one clamping surface to bear against the upright, and a second clamping member which is adjustable between a release position and a locking position and which is adapted, in the locking position, to be forcibly gripped between said first clamping member and said scaffold element so that said first clamping member is pressed towards the upright and the scaffold element is pressed in the direction out from the upright and as a result is clamped by means of said hook-shaped member in the engagement member.
Claim 3
Dependent Claim
78 words
A device as claimed in claim 1, wherein said scaffold element comprises a transverse slit, and said second clamping member comprises a wedge which is adapted to be introduced into the slit in the assembled state of the device and as a result to be pressed against at least one portion of said first clamping member so that the same is pressed in the direction of the upright, and said scaffold element is pressed in the opposite direction.
Claim 4
Dependent Claim
57 words
A device as claimed in claim 2, wherein said first clamping member comprises upper and lower clamping surfaces of which the upper clamping surfaces are adapted to bear against a wall of the upright above the engagement member while the lower clamping surfaces are adapted to bear against a wall of the upright below the engagement member.
Claim 5
Independent Claim
65 words
A device as claimed in any one of claims 1 to 3, wherein said first clamping member is composed of two end pieces which comprise said clamping surfaces and which are situated each at its own side of an end portion of the scaffold element and upper and lower transverse pieces which extend between said two end pieces respectively above and below said end portion.
Claim 6
Independent Claim
47 words
A device as claimed in any one of claims 1 to 3, wherein said wall of the engagement member and said intervening space extend continuously around the periphery of the upright enabling a plurality of scaffold elements to engage the engagement member while extending in different directions.
Claim 7
Dependent Claim
14 words
A device as claimed in claim 5, wherein said engagement member is substantially bowl-shaped.
Claim 8
Dependent Claim
42 words
A device as claimed in claim 4, wherein said transverse piece is adapted to be situated in the assembled state of the device, close to one edge of said transverse slit, the wedge being adapted to be pressed against said transverse piece.
Claim 9
Dependent Claim
87 words
A device as claimed in claim 1, wherein said second clamping member comprises a unit mounted eccentrically around a pin in the scaffold element with a curved clamping surface which is adapted to cooperate with an associated edge surface on said first clamping member so that the same is pressed by means of the curved clamping surface into the locking position of said second clamping member but can be moved down by means of a pivotal movement around the pin for release of said first clamping member.
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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) | 1987-03-27 | 1987-09-26 | 1988-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-27 | 1991-09-26 | 1992-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-27 | 1995-09-26 | 1996-03-27 | $7700.00 | Window Closed / Lapsed |