US3555957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Setting bolt or setting nail construction
Assignee: Hilti AG
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Filing: 1968-04-05
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Granted: 1971-01-19
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Expires: 1988-04-05
Abstract
Abstract A bolt or nail for an explosive powder-driven or power-driven bolt setting tool for setting the nails in metallic materials such as iron and steel sheets includes a bolt body having a shank portion in the form of a truncated cone of small pitch angle extending over the entire shank length. The shank is advantageously provided with a knurled surface over at least a portion of its length. The end face of the bolt body is either planar, concave or convex, or conical with an angle of aperture of preferably 120*. The ratio of the shank length to the shank diameter is within the range of approximately 3:1 to 1:1, and preferably about 2:1.
Inventors
- 👤 Werner Hermle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:36
CPC Classifications
F; F16; F16B; F16B19/00; F16B19/14; F16B35/00; F16B35/04; F16B35/041; F16B35/044; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/965; Y10S411/968
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
208 words
A bolt construction of a hard material capable of being driven into a receiving material such as concrete and steel by an explosive force operated setting tool, comprising A body having a generally cylindrical threaded portion defining the head end of the bolt, a hard-material-penetrating shank portion of truncated conical form and of small pitch angle over its entire shank length, the diameter of the shank being reduced in the direction of the leading end of the bolt, the maximum diameter of the shank being less than the minimum diameter of the threaded portion, the shank portion terminating in a blunt penetrating extremity and an intermediate conical transition portion between said threaded portion and said shank portion tapered inwardly towards said shank portion, said shank portion being substantially free of projections to permit it to penetrate into the receiving material but having a plurality of grooves defined in its surface providing means for holding the bolt in the receiving material, the ration of the length of the shank portion to the medium shank diameter being approximately from 3:1 to 1:1 and preferably about 2:1. the ratio of the length of the shank portion to the medium shank diameter being approximately from 3:1 to 1:1 and preferably about 2:1.
Claim 2
Dependent Claim
208 words
A bolt construction of a hard material capable of being driven into a receiving material such as concrete and steel by an explosive force operated setting tool, comprising A body having a generally cylindrical threaded portion defining the head end of the bolt, a hard-material-penetrating shank portion of truncated conical form and of small pitch angle over its entire shank length, the diameter of the shank being reduced in the direction of the leading end of the bolt, the maximum diameter of the shank being less than the minimum diameter of the threaded portion, the shank portion terminating in a blunt penetrating extremity and an intermediate conical transition portion between said threaded portion and said shank portion tapered inwardly towards said shank portion, said shank portion being substantially free of projections to permit it to penetrate into the receiving material but having a plurality of grooves defined in its surface providing means for holding the bolt in the receiving material, the ration of the length of the shank portion to the medium shank diameter being approximately from 3:1 to 1:1 and preferably about 2:1. the ratio of the length of the shank portion to the medium shank diameter being approximately from 3:1 to 1:1 and preferably about 2:1.
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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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |