US3832747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bolt and method of making the same
Assignee: Plastic Ind Inc
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Filing: 1970-02-24
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Granted: 1974-09-03
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Expires: 1990-02-24
Abstract
Abstract A shank, similar to the shank of a bolt and straight from end to end, is threaded along one end and has its other end knurled or otherwise processed to disturb the surface continuity of the metal, thus providing an irregular surface. A head having a shoulder portion provided with an axial opening is then pushed downwardly into position over the knurled end of the shank. Inward radial pressure is then exerted on the shoulder portions of the shank to cause the metal around the axial opening thereof to be displaced or flow into the adjacent irregularities of the shank. This permanently secures the head to the shank, just as if the two had been integrally formed. The inward radial pressure exerted against the shoulder of the head not only permanently unites the shoulder with the shank but also shapes the shoulder in accordance with any desired cross-sectional shape thereof, such as square, hexagonal, etc.
Inventors
- 👤 E Nankivell
- 👤 J Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:54
CPC Classifications
B; B21; B21K; B21K1/00; B21K1/44; B21K1/46; B21K1/56; B21K25/00; F; F16; F16B; F16B35/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
211 words
The method of making on a custom basis a malleable metal headed steel bolt of any desired length and size which comprises: 1. cutting a straight bolt shank to the desired length from steel round rod material with the bolt shank having opposing end portions; 2. threading one end portion of the bolt shank; 3. disrupting the peripheral surface of the other end portion of the bolt shank; 4. die-casting a bolt head from a die-casting malleable metal; the die cast bolt head having a finished head and a shoulder portion of circular cross section and provided with an axial recess of a cross sectional size to snugly receive the disrupted end portion of the bolt shank; 5. applying equal radially inward force against the entire outer peripheral surface of the shoulder portion of the head to cause the metal of the recess wall thereof to flow into the adjacent surface disruptions of the shank end portion and thus permanently fix the head to the said end portion of the bolt shank and to simultaneously alter the outer peripheral shoulder configuration in to a polygonal cross sectional shape thereby causing the die casting metal of the shoulder to flow into the surface irregularities of the shank end portion of the bolt.
Claim 2
Independent Claim
211 words
The method of making on a custom basis a malleable metal headed steel bolt of any desired length and size which comprises: 1. cutting a straight bolt shank to the desired length from steel round rod material with the bolt shank having opposing end portions; 2. threading one end portion of the bolt shank; 3. disrupting the peripheral surface of the other end portion of the bolt shank; 4. die-casting a bolt head from a die-casting malleable metal; the die cast bolt head having a finished head and a shoulder portion of circular cross section and provided with an axial recess of a cross sectional size to snugly receive the disrupted end portion of the bolt shank; 5. applying equal radially inward force against the entire outer peripheral surface of the shoulder portion of the head to cause the metal of the recess wall thereof to flow into the adjacent surface disruptions of the shank end portion and thus permanently fix the head to the said end portion of the bolt shank and to simultaneously alter the outer peripheral shoulder configuration in to a polygonal cross sectional shape thereby causing the die casting metal of the shoulder to flow into the surface irregularities of the shank end portion of the bolt.
Claim 3
Dependent Claim
8 words
threading one end portion of the bolt shank;
Claim 4
Dependent Claim
8 words
threading one end portion of the bolt shank;
Claim 5
Dependent Claim
13 words
disrupting the peripheral surface of the other end portion of the bolt shank;
Claim 6
Dependent Claim
13 words
disrupting the peripheral surface of the other end portion of the bolt shank;
Claim 7
Dependent Claim
48 words
die-casting a bolt head from a die-casting malleable metal; the die cast bolt head having a finished head and a shoulder portion of circular cross section and provided with an axial recess of a cross sectional size to snugly receive the disrupted end portion of the bolt shank;
Claim 8
Dependent Claim
48 words
die-casting a bolt head from a die-casting malleable metal; the die cast bolt head having a finished head and a shoulder portion of circular cross section and provided with an axial recess of a cross sectional size to snugly receive the disrupted end portion of the bolt shank;
Claim 9
Dependent Claim
93 words
applying equal radially inward force against the entire outer peripheral surface of the shoulder portion of the head to cause the metal of the recess wall thereof to flow into the adjacent surface disruptions of the shank end portion and thus permanently fix the head to the said end portion of the bolt shank and to simultaneously alter the outer peripheral shoulder configuration in to a polygonal cross sectional shape thereby causing the die casting metal of the shoulder to flow into the surface irregularities of the shank end portion of the bolt.
Claim 10
Dependent Claim
93 words
applying equal radially inward force against the entire outer peripheral surface of the shoulder portion of the head to cause the metal of the recess wall thereof to flow into the adjacent surface disruptions of the shank end portion and thus permanently fix the head to the said end portion of the bolt shank and to simultaneously alter the outer peripheral shoulder configuration in to a polygonal cross sectional shape thereby causing the die casting metal of the shoulder to flow into the surface irregularities of the shank end portion of the bolt.
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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) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |