Patent US4505979A successfully refreshed from Google Patents.
US4505979A
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Pin for connecting machine elements with each other
Assignee: Novartis Corp
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Filing: 1984-04-16
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Granted: 1985-03-19
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Expires: 2004-04-16
Abstract
Abstract In order to provide a pin for connecting machine parts with one another, which is of optimally light weight, the pin is of a compound structure comprising a core of filler-reinforced synthetic plastics resin and a metallic envelope. As filler there are used quartz sand or carbon fibers. The envelope is preferably seated on the core under circumferential tensile bias. The manufacture of the pin takes place, for instance, by pressing the filler and a matrix resin system directly into a suitably prepared envelope.
Inventors
- 👤 Christoph Ruegg
- 👤 Peter Voirol
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:44
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/02; B29C43/18; B29C43/003; C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/06; F; F16; F16J; F16J1/00; F16J1/10; F16J1/14; F16J1/16; B29K; B29K2105/00; B29K2105/06; B29K2105/12; B29K2105/16; B29K2307/00; B29K2709/00; B29L; B29L2001/00; B29L2001/002; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32861; Y10T403/45; Y10T403/451; Y10T403/49; Y10T403/4933; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2927; Y10T428/2933; Y10T428/2935; Y10T428/294; Y10T428/2973; Y10T428/2975
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
74 words
A pin having a central longitudinal pin axis and being adapted for connecting machine elements with each other, which pin comprises a metal shell and a core therein, said core consisting essentially of fully hardened, oil-fast matrix system of a polyimide resin system having a glass transition temperature above 200° C. and at least about 55 percent by volume of the total core volume of a reinforcing granular fillter material embedded in said system.
Claim 2
Dependent Claim
74 words
A pin having a central longitudinal pin axis and being adapted for connecting machine elements with each other, which pin comprises a metal shell and a core therein, said core consisting essentially of fully hardened, oil-fast matrix system of a polyimide resin system having a glass transition temperature above 200° C. and at least about 55 percent by volume of the total core volume of a reinforcing granular fillter material embedded in said system.
Claim 3
Dependent Claim
17 words
The pin of claim 1, wherein said particulate filler is selected from quartz sand and amorphous quartz.
Claim 4
Dependent Claim
25 words
The pin of claim 1, wherein the thickness of the shell is in the range of from about 1 to 10% of the pin diameter.
Claim 5
Dependent Claim
24 words
The pin of claim 1, wherein the thickness of the shell is in the range of from 3 to 6% of the pin diameter.
Claim 6
Dependent Claim
59 words
The pin of claim 1, wherein the polyimide resin system is the fully cured resin obtained from a monomer mixture essentially consisting of 40 to 70 parts by weight of p, p'-bis(imidyl)-diphenylmethane, and, the balance, to make up 100 parts by weight, of a reactive thinner monomer selected from the group consisting of polyfunctional allyl cyanate and aryl cyanate.
Claim 7
Dependent Claim
53 words
The pin of claim 5, wherein the monomer mixture contains additionally a minor amount of a third monomer component selected from an acrylate of a polyhydric aliphatic alcohol having from 2 to 4 hydroxyl groups, a methacrylate of a polyhydric aliphatic alcohol having from 2 to 4 hydroxyl groups, and an aromatic diamine.
Claim 8
Dependent Claim
22 words
The pin of claim 6, wherein the aromatic diamine is selected from the group consisting of diamino diphenyl methane and diamino-diphenyl sulfone.
Claim 9
Dependent Claim
13 words
The pin of claim 5, wherein said aryl cyanate is bisphenol A cyanate.
Claim 10
Dependent Claim
13 words
The pin of claim 5, wherein said polyfunctional allyl cyanate is 3,3'-diallyl-bisphenol A.
Claim 11
Dependent Claim
34 words
The pin of claim 5, wherein the uncured monomer mixture affording the polymide resin system further comprises as initiator an organic compound containing an unstable C-C bond and being decomposable by heating into radicals.
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) | 1988-03-18 | 1988-09-17 | 1989-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-18 | 1992-09-17 | 1993-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-18 | 1996-09-17 | 1997-03-19 | $7700.00 | Window Closed / Lapsed |