Patent US4576847A successfully refreshed from Google Patents.
US4576847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Threaded fiber-reinforced plastic member and method of coating the same
Assignee: Asahi Kasei Corp
•
Filing: 1984-11-13
•
Granted: 1986-03-18
•
Expires: 2004-11-13
Abstract
Abstract A threaded member made of fiber-reinforced plastic (FRP) obtained by the present invention which is characterized by having at least the threaded portion coated with a crosslinked nylon resin. Accordingly, the surface of the threaded portion is smooth, exhibiting adequate elasticity and fitness, and exhibiting excellent screwing ability to enable the smooth meshing of a nut with a bolt without jolting. Moreover, the threaded member is also excellent in weathering resistance and chemical resistance.
Inventors
- 👤 Isao Tajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:52
CPC Classifications
B; B29; B29D; B29D1/00; B29D1/005; F; F16; F16B; F16B33/00; F16B33/006; B29K; B29K2063/00; B29K2077/00; B29K2105/00; B29K2105/06; B29K2105/12; B29L; B29L2009/00; Y; Y10; Y10S; Y10S411/00; Y10S411/90; Y10S411/901; Y10S411/904; Y10S411/908; Y10S411/914; Y10T; Y10T428/00; Y10T428/22
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
30 words
A threaded member, comprising a threaded member made of fiber reinforced plastic and a coating of a crosslinked nylon resin on at least the threaded portion of the threaded member.
Claim 2
Dependent Claim
30 words
A threaded member, comprising a threaded member made of fiber reinforced plastic and a coating of a crosslinked nylon resin on at least the threaded portion of the threaded member.
Claim 3
Dependent Claim
18 words
The threaded member according to claim 1, wherein the crosslinked nylon resin is a methoxymethylated nylon 6 resin.
Claim 4
Dependent Claim
19 words
The threaded member according to claim 1, wherein the fiber-reinforced plastic comprises an epoxy resin reinforced with fiber glass.
Claim 5
Dependent Claim
20 words
The threaded member according to claim 3, wherein the threaded portion is formed by cutting threads into the fiber-reinforced plastic.
Claim 6
Dependent Claim
11 words
The threaded member according to claim 4, which is a nut.
Claim 7
Dependent Claim
11 words
The threaded member according to claim 4, which is a bolt.
Claim 8
Independent Claim
53 words
A method for producing a threaded member made of fiber-reinforced plastic, which comprises coating at least the threaded worked portion of a member made of fiber-reinforced plastic with a solution of a crosslinkable nylon resin in an alcoholic solvent, and curing the resin thereby to coat the member with a crosslinked nylon resin.
Claim 9
Independent Claim
53 words
A method for producing a threaded member made of fiber-reinforced plastic, which comprises coating at least the threaded worked portion of a member made of fiber-reinforced plastic with a solution of a crosslinkable nylon resin in an alcoholic solvent, and curing the resin thereby to coat the member with a crosslinked nylon resin.
Claim 10
Dependent Claim
17 words
The method according to claim 7, wherein the crosslinkable nylon resin is a methoxymethylated nylon 6 resin.
Claim 11
Dependent Claim
14 words
The method according to claim 8, wherein the alcoholic solvent is methanol or ethanol.
Claim 12
Dependent Claim
28 words
The method according to claim 9, wherein curing by heating is conducted at a temperature range of from 120° to 160° C. for about 15 to 40 minutes.
Claim 13
Dependent Claim
20 words
The method according to claim 7, wherein an organic acid is added into the solution of the crosslinkable nylon resin.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |