US3561307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastening device
Assignee: Individual
•
Filing: 1968-04-04
•
Granted: 1971-02-09
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Expires: 1988-04-04
Abstract
Abstract A plastic mold-in wall plug is provided which has a thin wall tubular section and an adjacent thick wall section having an inner threaded bore whereby when the plug is molded into a cement structure or the like and fastening means are screwed thereinto and tightened, the stress created in the wall plug will be distributed over a large portion of the cement surrounding the wall plug and this distribution will be away from the cement surface thereby eliminating the risk of bursting off a portion of the concrete.
Inventors
- 👤 Louis Aackersberg Mortensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:17
CPC Classifications
F; F16; F16B; F16B33/00; F16B33/006; E; E04; E04B; E04B1/00; E04B1/38; E04B1/41; E04B1/4114; E04B1/4121; F16B37/00; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/947
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
203 words
A one piece synthetic plastic mold-in wall plug comprising an elongated thin walled axially rigid tubular section having a smooth inner surface, an adjacent thick walled section having an inner internally threaded bore, said thin walled and said thick walled sections both defining circumferentially continuous surfaces, said thick walled section being connected to said thin walled section and the axis of said tubular member and the axis of said bore being substantially coaxial, the thickness of said thick walled section, for at least a portion of its length, being substantially greater than the thickness of said tubular section, and said thick walled section for at least a portion of its length extending radially outwardly beyond said thin walled section, whereby said thick walled section comprising means for preventing the removal of the plug when it is molded into a cement structure and whereby when the plug is molded into a cement structure or the like and fastening means are screwed thereinto and tightened, the stress created in the thick walled section will be distributed at a substantial distance from the surface of the wall over a relatively large portion of the cement surrounding said section and in directions throughout a large angular range.
Claim 2
Dependent Claim
203 words
A one piece synthetic plastic mold-in wall plug comprising an elongated thin walled axially rigid tubular section having a smooth inner surface, an adjacent thick walled section having an inner internally threaded bore, said thin walled and said thick walled sections both defining circumferentially continuous surfaces, said thick walled section being connected to said thin walled section and the axis of said tubular member and the axis of said bore being substantially coaxial, the thickness of said thick walled section, for at least a portion of its length, being substantially greater than the thickness of said tubular section, and said thick walled section for at least a portion of its length extending radially outwardly beyond said thin walled section, whereby said thick walled section comprising means for preventing the removal of the plug when it is molded into a cement structure and whereby when the plug is molded into a cement structure or the like and fastening means are screwed thereinto and tightened, the stress created in the thick walled section will be distributed at a substantial distance from the surface of the wall over a relatively large portion of the cement surrounding said section and in directions throughout a large angular range.
Claim 3
Dependent Claim
39 words
A wall plug according to claim 1 wherein said thick wall section has a substantially conical exterior surface tapering inwardly away from said tubular section and has a shoulder portion extending between said tubular section and said conical surface.
Claim 4
Dependent Claim
22 words
A wall plug according to claim 2, wherein said thick walled section shoulder is planar and extends substantially in the radial direction.
Claim 5
Dependent Claim
22 words
A wall plug according to claim 3, further comprising a metallic section having an inner conical surface adjacently surrounding said conical surface.
Claim 6
Dependent Claim
13 words
A wall plug according to claim 2, wherein said shoulder portion is curvilinear.
Claim 7
Dependent Claim
42 words
A wall plug according to claim 2, wherein said shoulder comprises a planar portion extending radially outwardly from said tubular section and a second conical section tapering outwardly away from said tubular section joining said planar portion to said first conical section.
Claim 8
Dependent Claim
21 words
A wall plug according to claim 6 including a metallic ring having an interior conical surface adjacent said shoulder conical surface.
Claim 9
Dependent Claim
24 words
A wall plug according to claim 1 wherein said thick wall section has a conical exterior surface tapering outwardly away from said tubular section.
Claim 10
Dependent Claim
149 words
A one-piece synthetic mold-in wall plug comprising an elongated thin walled axially rigid tubular section having a smooth inner surface, an adjacent thick wAlled section having an inner internally threaded bore, said thin walled and said thick walled sections both defining circumferentially continuous surfaces, said thick walled section being connected to said thin walled section and the axis of said tubular member and the axis of said bore being substantially coaxial, the thickness of said thick walled section, for at least a portion of its length, being substantially greater than the thickness of said tubular section, said thick walled section having a substantially conical exterior surface tapering inwardly away from said tubular section and having an external shoulder portion extending between said tubular section and said conical surface, and a metallic section having an inner conical surface adjacently surrounding at least a portion of said thick walled conical surface.
Claim 11
Dependent Claim
149 words
A one-piece synthetic mold-in wall plug comprising an elongated thin walled axially rigid tubular section having a smooth inner surface, an adjacent thick wAlled section having an inner internally threaded bore, said thin walled and said thick walled sections both defining circumferentially continuous surfaces, said thick walled section being connected to said thin walled section and the axis of said tubular member and the axis of said bore being substantially coaxial, the thickness of said thick walled section, for at least a portion of its length, being substantially greater than the thickness of said tubular section, said thick walled section having a substantially conical exterior surface tapering inwardly away from said tubular section and having an external shoulder portion extending between said tubular section and said conical surface, and a metallic section having an inner conical surface adjacently surrounding at least a portion of said thick walled conical surface.
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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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |