US3575448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener
Assignee: Doosan Bobcat North America Inc
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Filing: 1969-06-12
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Granted: 1971-04-20
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Expires: 1989-06-12
Abstract
Abstract A fastener consisting of two members secured together by welding, with a third member securely clamped between the two members by the shrinkage of the weld as it cools.
Inventors
- 👤 Vincent Licari
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:09
CPC Classifications
F; F16; F16B; F16B5/00; F16B5/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
100 words
A fastener construction for firmly securing a first member to a second weldable member comprising a surface on the first member located so that force exerted on said surface has a component urging the said first member into engagement with the second member, a third member having a portion thereon in engagement with the said surface on the first member, the said third member having another portion thereof adjacent to but spaced from the second member, and a weld joining the second and third members and clamping the first member therebetween by the shrinkage of the weld as it cools.
Claim 2
Dependent Claim
100 words
A fastener construction for firmly securing a first member to a second weldable member comprising a surface on the first member located so that force exerted on said surface has a component urging the said first member into engagement with the second member, a third member having a portion thereon in engagement with the said surface on the first member, the said third member having another portion thereof adjacent to but spaced from the second member, and a weld joining the second and third members and clamping the first member therebetween by the shrinkage of the weld as it cools.
Claim 3
Dependent Claim
75 words
A fastener construction as specified in claim 1 in which the first member has a circular opening therein and the said surface on the said first member surrounds such opening and is circular with a frustoconical surface, and the said third member is located in the said opening and is also circular, and the portion thereon which engages the first member is a mating external frustoconical surface in engagement with the said first frustoconical surface.
Claim 4
Independent Claim
114 words
The method of firmly securing together two members, one of which is weldable, which comprises providing a surface on the member other than the weldable member which is engaged by a third member to urge it against tHe weldable member, placing a third weldable member in engagement with the said surface in a position leaving a space between the said third member and the weldable member, and welding the said third member and the weldable member and thereby securing the said other member to the weldable member by the shrinkage of the weld as it cools exerting a clamping force on the said other member between the said third member and the weldable member.
Claim 5
Independent Claim
114 words
The method of firmly securing together two members, one of which is weldable, which comprises providing a surface on the member other than the weldable member which is engaged by a third member to urge it against tHe weldable member, placing a third weldable member in engagement with the said surface in a position leaving a space between the said third member and the weldable member, and welding the said third member and the weldable member and thereby securing the said other member to the weldable member by the shrinkage of the weld as it cools exerting a clamping force on the said other member between the said third member and the weldable member.
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |