Patent US2448131A successfully refreshed from Google Patents.
US4828441A
Expired / Lapsed
US
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Locked threaded insert for high stress application
Assignee: RTX Corp
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Filing: 1987-07-08
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Granted: 1989-05-09
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Expires: 2007-07-08
Abstract
Abstract A threaded insert 22 is restrained from rotation by deformation into a recess 28. The recess 28 is only located in line with a directional stress pattern 34 in the receiving member 18 whereby stress concentration is avoided at high stress locations.
Inventors
- 👤 Thomas Frasca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:16
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/12; F16B37/122; F01; F01D; F01D25/00; F01D25/24; F01D25/243; F16B33/00; F16B33/002; F16B37/04; F16B37/06; F16B37/062; F16B37/065; F16B39/00; F16B39/02; F16B39/025; F05; F05D; F05D2250/00; F05D2250/20; F05D2250/28; F05D2250/281; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/972
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
113 words
A threaded insert arrangement for securing a threaded insert to a plate having a high directional stress therein, for later holding at attachment thereto comprising: a plate having a directional stress therein parallel to the surface of said plate; a cylindrical opening through said plate; an insert having a cylindrical body, an internal longitudinally extending threaded bore, and a shoulder extending radially beyond said cylindrical body for abutment with said plate; a restraining recess in said plate contiguous with said cylindrical opening and centered about a line which intersects the central axis parallel to said directional stress; and a portion of said insert located so as to be deformable into said restraining recess.
Claim 2
Dependent Claim
113 words
A threaded insert arrangement for securing a threaded insert to a plate having a high directional stress therein, for later holding at attachment thereto comprising: a plate having a directional stress therein parallel to the surface of said plate; a cylindrical opening through said plate; an insert having a cylindrical body, an internal longitudinally extending threaded bore, and a shoulder extending radially beyond said cylindrical body for abutment with said plate; a restraining recess in said plate contiguous with said cylindrical opening and centered about a line which intersects the central axis parallel to said directional stress; and a portion of said insert located so as to be deformable into said restraining recess.
Claim 3
Dependent Claim
33 words
A threaded insert arrangement as in claim 1: said restraining recess comprising a recess only partly through the thickness of said plate, and having an edge in the form of a partial cylinder.
Claim 4
Dependent Claim
52 words
A threaded insert arrangement as in claim 1: said insert having an unthreaded extension extending beyond said threads at the end opposite said shoulder; said extension located adjacent said retaining recess when said insert is placed within said cylindrical opening; and at least a portion of said extension deformed into said recess.
Claim 5
Dependent Claim
15 words
A threaded insert arrangement as in claim 3: said unthreaded extension comprising a cylindrical extension.
Claim 6
Dependent Claim
44 words
A threaded insert arrangement as in claim 1: a second restraining recess contiguous with said cylindrical opening located 180 degrees from the other restraining recess, whereby both recesses are and centered about a line which intersects the central axis parallel to said directional stress.
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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) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |