US3837755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-piece rod for control and structural members
Assignee: Grumman Corp
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Filing: 1973-10-17
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Granted: 1974-09-24
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Expires: 1993-10-17
Abstract
Abstract A multi-piece rod employing a thin central tubular member in combination with end members. The end members are provided with circumferential grooves and advantageously a knurled section. The circumferential grooves have a critical diameter and configuration for receiving the tubular member to effect attachment therebetween.
Inventors
- 👤 R Benoit
- 👤 W Peters
- 👤 J Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:08
CPC Classifications
F; F16; F16B; F16B7/00; F16B7/06; F16C; F16C7/00; F16C7/06; F16B17/00; F16B17/004; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T403/00; Y10T403/49
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
175 words
An assembly of a tubular member permanently attached to an end member, to provide a minimum wall thickness of the tubular member for the required strength, comprising: a groove in the end member receiving a deformed portion of said tubular member and having a major diameter wherein the ratio of the major diameter of the end member to groove diameter is between 1.03 and 1.48, the ratio of the width of the groove to the depth of the groove is between 4.90 and 8.67, the ratio of the depth of the groove to the radius of the lower corners of the groove is between 0.75 and 3.50, the angle which the sidewalls of the groove make with the surface formed by the major diameter of the groove is between 40* and 65* and the tube wall thickness of the tubular member has a relationship to the radius formed at the corner where the groove meets the surface formed by the major diameter of the end member such that their ratio is between 0.70 and 4.10.
Claim 2
Dependent Claim
175 words
An assembly of a tubular member permanently attached to an end member, to provide a minimum wall thickness of the tubular member for the required strength, comprising: a groove in the end member receiving a deformed portion of said tubular member and having a major diameter wherein the ratio of the major diameter of the end member to groove diameter is between 1.03 and 1.48, the ratio of the width of the groove to the depth of the groove is between 4.90 and 8.67, the ratio of the depth of the groove to the radius of the lower corners of the groove is between 0.75 and 3.50, the angle which the sidewalls of the groove make with the surface formed by the major diameter of the groove is between 40* and 65* and the tube wall thickness of the tubular member has a relationship to the radius formed at the corner where the groove meets the surface formed by the major diameter of the end member such that their ratio is between 0.70 and 4.10.
Claim 3
Dependent Claim
25 words
An assembly as in claim 1 further comprising a knurled section on the end member in engagement with the inner surface of the tubular member.
Claim 4
Dependent Claim
13 words
An assembly as in claim 1 wherein the end member includes two grooves.
Claim 5
Dependent Claim
22 words
An assembly as in claim 3 wherein a knurled section is formed between the grooves on the surface of the end 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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |