US3568562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clamp with predetermined clamping force
Assignee: Monogram Industries Inc
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Filing: 1969-01-10
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Granted: 1971-03-09
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Expires: 1989-01-10
Abstract
Abstract The clamp with predetermined clamping force disclosed herein is provided with first and second opposed wires having hooks thereon for engagement through aligned holes in sheet material intended to be clamped. A tee is extendable relatively to the wires between the wires to engage the hooks at the edges of the holes. The clamp body engages the sheets opposite to the hooks so that the force by which the hooks are pulled into the body is the sheet clamping force. This force is created by stressing springs, and the amount of spring stress or deflection is indicated by the position of the spring housing body with respect to the main clamp body so that when they are moved to a predetermined position, a predetermined amount of clamping force is obtained.
Inventors
- 👤 Malcolm P Harwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:49
CPC Classifications
B; B25; B25B; B25B31/00; B25B31/005
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
198 words
A clamp arranged to apply several predetermined clamping forces at several definite marked locations, said clamp comprising: a clamp body, said clamp body having a face adapted to be in a contactual relationship with a first side of material to be clamped; first and second elongated members each having a hook thereon, said hooks on said elongated members facing away from each other with a spreader member positionable between said elongated members adjacent said hooks, said elongated members extending into said clamp body; a clamp screw, said elongated members being secured to said clamp screw; a nut on said clamp screw, the improvement comprising: a spring housing positioned around said clamp screw and engaged by said nut, said spring housing being movable with respect to said clamp body; and a spring member within said spring housing, said spring member engaging said spring housing and thrusting against said clamp body so that by tightening said nut said spring member is deflected to exert a force between said clamp body and said clamp screw, The amount of deflection of said spring member is a function of the clamping force on the material engaged by said clamp body and said hooks.
Claim 2
Dependent Claim
198 words
A clamp arranged to apply several predetermined clamping forces at several definite marked locations, said clamp comprising: a clamp body, said clamp body having a face adapted to be in a contactual relationship with a first side of material to be clamped; first and second elongated members each having a hook thereon, said hooks on said elongated members facing away from each other with a spreader member positionable between said elongated members adjacent said hooks, said elongated members extending into said clamp body; a clamp screw, said elongated members being secured to said clamp screw; a nut on said clamp screw, the improvement comprising: a spring housing positioned around said clamp screw and engaged by said nut, said spring housing being movable with respect to said clamp body; and a spring member within said spring housing, said spring member engaging said spring housing and thrusting against said clamp body so that by tightening said nut said spring member is deflected to exert a force between said clamp body and said clamp screw, The amount of deflection of said spring member is a function of the clamping force on the material engaged by said clamp body and said hooks.
Claim 3
Dependent Claim
53 words
The clamp of claim 1 wherein said spring housing has a lip thereon, and a mark is positioned with respect to said clamp body so that when said spring is deflected so that said spring housing lip is aligned with said mark, said clamp applies a predetermined force upon the member being clamped.
Claim 4
Dependent Claim
27 words
The clamp of claim 2 wherein a force control washer is interposed between said clamp and said body and said mark is on said force control washer.
Claim 5
Dependent Claim
38 words
The clamp of claim 3 where said force control washer has first and second marks thereon, said first and second marks representing first and second predetermined clamping forces applicable by said clamp on the member to be clamped.
Claim 6
Dependent Claim
44 words
The clamp of claim 3 wherein said force control washer has a shoulder thereon and said spring housing is crimped around said shoulder to retain said force control washer with respect to said spring housing to retain said spring member within said spring housing.
Claim 7
Dependent Claim
17 words
The clamp of claim 3 wherein said spring member comprises at least one truncated hollow conical spring.
Claim 8
Dependent Claim
30 words
The clamp of claim 6 wherein said spring member comprises a plurality of truncated hollow conical springs arranged in series interposed between said spring housing and said force control washer.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |