US4111579A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scaffolding
Assignee: NORTH WESTERN SCAFFOLDING CO Ltd
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Filing: 1977-03-29
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Granted: 1978-09-05
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Expires: 1997-03-29
Abstract
Abstract A scaffold fitting attached to a scaffold tube as a lever secured by a screw which passes through an intermediate aperture in the lever and which can be tightened to urge one end of the layer against a flanged member to clamp the latter directly against the scaffold tube.
Inventors
- 👤 Stephen Vincent Knight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:08
CPC Classifications
E; E04; E04G; E04G7/00; E04G7/02; E04G7/26; E04G7/06; E04G7/12; E04G7/18; Y; Y10; Y10T; Y10T403/00; Y10T403/30; Y10T403/71; Y10T403/7117
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
101 words
A scaffold fitting for clamping a scaffold tube to a flanged member or the like to vice versa comprising a body, means for detachably securing said body to a scaffold tube, a lever, and means aligned with said means for securing the body to the scaffold tube for tightening the lever onto the body to enable a portion of the lever to clamp the flanged member or the like directly against the scaffold tube without applying to the means for securing the body to the scaffold tube a load any greater than the load on the means for tightening the lever.
Claim 2
Dependent Claim
101 words
A scaffold fitting for clamping a scaffold tube to a flanged member or the like to vice versa comprising a body, means for detachably securing said body to a scaffold tube, a lever, and means aligned with said means for securing the body to the scaffold tube for tightening the lever onto the body to enable a portion of the lever to clamp the flanged member or the like directly against the scaffold tube without applying to the means for securing the body to the scaffold tube a load any greater than the load on the means for tightening the lever.
Claim 3
Dependent Claim
58 words
A scaffold fitting according to claim 1 in which said means for securing said body to the scaffold tube comprises a clamping jaw, means pivoting one end of said clamping jaw to one end of said body, and screw and nut means operative between an opposite free end of said jaw and the other end of said body.
Claim 4
Dependent Claim
28 words
A scaffold fitting according to claim 1 in which said tightening means comprises a screw and nut operative between said body and an intermediate portion of said lever.
Claim 5
Dependent Claim
46 words
A scaffold fitting according to claim 1 in which one free end of said lever is arranged to abut directly against the scaffold tube leaving the other end portion of said lever free to clamp the flanged member or the like directly against the scaffold tube.
Claim 6
Dependent Claim
27 words
A scaffold fitting according to claim 4 in which said one free end of said lever is curved to conform to the curvature of the scaffold tube.
Claim 7
Dependent Claim
104 words
A scaffold fitting for clamping a scaffold tube to a flanged member or the like or vice versa comprising a body, means for securing said body to a scaffold tube, a lever, and means for tightening the lever onto the body to enable a portion of the lever to clamp the flanged member or the like directly against the scaffold tube, said tightening means including a screw and nut operative between said body and an intermediate portion of said lever, said screw having a head by which it is hinged to said body to pivot in a plane extending longitudinally of the scaffold tube.
Claim 8
Dependent Claim
104 words
A scaffold fitting for clamping a scaffold tube to a flanged member or the like or vice versa comprising a body, means for securing said body to a scaffold tube, a lever, and means for tightening the lever onto the body to enable a portion of the lever to clamp the flanged member or the like directly against the scaffold tube, said tightening means including a screw and nut operative between said body and an intermediate portion of said lever, said screw having a head by which it is hinged to said body to pivot in a plane extending longitudinally of the scaffold tube.
Claim 9
Dependent Claim
165 words
In a scaffolding system having scaffold tubes and at least one flanged member; a scaffold fitting for clamping a scaffold tube to said flanged member, said fitting comprising a body, means for securing said body to a scaffold tube, a lever having an intermediate aperture between opposite free ends thereof, a screw passing through said aperture in said lever, said body having an inner groove extending transversely to the scaffold tube and a hole communicating with said inner groove, said screw passing through said hole with clearance and having a head received in said groove whereby said screw is hinged to said body to pivot in a plane extending longitudinally of the scaffold tube, and a nut threaded on said screw to tighten said lever onto said body to enable one free end of said lever to abut directly against said scaffold tube and the other free end of said lever to abut said flanged member to clamp the latter directly against said scaffold tube.
Claim 10
Dependent Claim
165 words
In a scaffolding system having scaffold tubes and at least one flanged member; a scaffold fitting for clamping a scaffold tube to said flanged member, said fitting comprising a body, means for securing said body to a scaffold tube, a lever having an intermediate aperture between opposite free ends thereof, a screw passing through said aperture in said lever, said body having an inner groove extending transversely to the scaffold tube and a hole communicating with said inner groove, said screw passing through said hole with clearance and having a head received in said groove whereby said screw is hinged to said body to pivot in a plane extending longitudinally of the scaffold tube, and a nut threaded on said screw to tighten said lever onto said body to enable one free end of said lever to abut directly against said scaffold tube and the other free end of said lever to abut said flanged member to clamp the latter directly against said scaffold tube.
Claim 11
Dependent Claim
30 words
A scaffold fitting according to claim 7 in which said body has a central semi-cylindriform protrusion, said groove being formed inside said protrusion and said hole being through said protrusion.
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) | 1981-09-04 | 1982-03-06 | 1982-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-04 | 1986-03-06 | 1986-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-04 | 1990-03-06 | 1990-09-05 | $7700.00 | Window Closed / Lapsed |