Patent US4404053A successfully refreshed from Google Patents.
US4404053A
Expired / Lapsed
US
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Method of making a javelin
Assignee: Individual
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Filing: 1980-12-15
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Granted: 1983-09-13
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Expires: 2000-12-15
Abstract
Abstract A composite javelin having superior vibration damping characteristics is provided having a hollow or low density body of generally circular cross-section which tapers from small diameter front and rear tip ends to a large diameter more or less in the center, said tapered diameters and general tip and grip features being in conformance with the requirements of the International Olympic Committee. The javelin body can be constructed in either a one or two piece manner and constitutes a plurality of Kevlar® or fiber glass prepreg bias wound plys forming an underlayer and a plurality of bias wound graphite/epoxy prepreg plys forming an overlayer. In the preferred two piece construction, the distribution of weight and composite center of gravity can be adjusted within the body to allow tuning the javelin to an individual athlete's throwing characteristics.
Inventors
- 👤 Victor Saffire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:12
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/56; B29C53/58; A; A63; A63B; A63B65/00; A63B65/02; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29K; B29K2063/00; B29K2105/00; B29K2105/06; B29K2105/08; B29L; B29L2031/00; B29L2031/52; Y; Y10; Y10S; Y10S273/00; Y10S273/07; Y10S273/23; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314; Y10T428/1328; Y10T428/29; Y10T428/2913; Y10T428/2918; Y10T428/2933; Y10T428/2936; Y10T428/2973; Y10T428/2976; Y10T428/30
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
256 words
A method of forming a javelin having a hollow body of generally circular cross-section which tapers from a small diameter rear end through a larger diameter middle section to a reduced diameter at its front end, the interior of said body tapering more or less in the same manner as the exterior of the javelin so as to keep the wall thickness of said body more or less constant, said javelin body comprising a plurality of cross-plied bias wound fiber plies, said method comprising: (a) providing a removable mandrel for receiving said fiber plies; (b) applying a first ply formed of a resin bonded tape onto said mandrel; (c) reversing said mandrel and applying a second ply formed of a resin bonded tape over said first ply of resin bonded tape; (d) alternately reversing said mandrel and applying additional plies of resin bonded tape thereto until a finished underlayer is produced; (e) applying a first ply formed of a resin bonded graphite tape over said underlayer; (f) reversing said mandrel and applying a second ply formed of a resin bonded graphite tape over said first ply of resin bonded graphite tape; (g) alternately reversing said mandrel and applying additional plies of resin bonded graphite tape thereto until a finished javelin body is formed; (h) applying a heat shrinkable tape over said body; (i) removing said body from said mandrel; (j) curing said body; (k) affixing a metal tip to the front end of said body; and (l) wrapping a cord grip around mid-portions of said body.
Claim 2
Independent Claim
256 words
A method of forming a javelin having a hollow body of generally circular cross-section which tapers from a small diameter rear end through a larger diameter middle section to a reduced diameter at its front end, the interior of said body tapering more or less in the same manner as the exterior of the javelin so as to keep the wall thickness of said body more or less constant, said javelin body comprising a plurality of cross-plied bias wound fiber plies, said method comprising: (a) providing a removable mandrel for receiving said fiber plies; (b) applying a first ply formed of a resin bonded tape onto said mandrel; (c) reversing said mandrel and applying a second ply formed of a resin bonded tape over said first ply of resin bonded tape; (d) alternately reversing said mandrel and applying additional plies of resin bonded tape thereto until a finished underlayer is produced; (e) applying a first ply formed of a resin bonded graphite tape over said underlayer; (f) reversing said mandrel and applying a second ply formed of a resin bonded graphite tape over said first ply of resin bonded graphite tape; (g) alternately reversing said mandrel and applying additional plies of resin bonded graphite tape thereto until a finished javelin body is formed; (h) applying a heat shrinkable tape over said body; (i) removing said body from said mandrel; (j) curing said body; (k) affixing a metal tip to the front end of said body; and (l) wrapping a cord grip around mid-portions of said body.
Claim 3
Independent Claim
227 words
A method of forming a javelin having a hollow body of generally circular cross-section which tapers from a small diameter rear end through a larger diameter middle section to reduced diameter at its front end, the interior of said body tapering more or less in the same manner as the exterior of the javelin so as to keep the wall thickness of said body mre or less constant, wherein said javelin body comprises a plurality of cross-plied bias wound fiber plies forming matably engagable front and rear sections, said method comprising: (a) providing a removable mandrel for receiving said fiber plies; (b) applying a first ply formed of a resin bonded tape; onto said mandrel; (c) reversing said mandrel and applying a second ply formed of a resin bonded tape over said first ply of resin bonded tape; (d) alternately reversing said mandrel and applying additional plies of resin bonded tape thereto until a finished front section is produced; (e) curing said front section and removing said front section from said mandrel; (f) forming said rear section on said mandrel according to steps b to e herein; (g) joining said front and rear sections with adjustable coupling means to produce a finished javelin body; (h) applying a metal tip to the front end of said body; and (i) wrapping a cord grip around mid-portions of said body.
Claim 4
Independent Claim
227 words
A method of forming a javelin having a hollow body of generally circular cross-section which tapers from a small diameter rear end through a larger diameter middle section to reduced diameter at its front end, the interior of said body tapering more or less in the same manner as the exterior of the javelin so as to keep the wall thickness of said body mre or less constant, wherein said javelin body comprises a plurality of cross-plied bias wound fiber plies forming matably engagable front and rear sections, said method comprising: (a) providing a removable mandrel for receiving said fiber plies; (b) applying a first ply formed of a resin bonded tape; onto said mandrel; (c) reversing said mandrel and applying a second ply formed of a resin bonded tape over said first ply of resin bonded tape; (d) alternately reversing said mandrel and applying additional plies of resin bonded tape thereto until a finished front section is produced; (e) curing said front section and removing said front section from said mandrel; (f) forming said rear section on said mandrel according to steps b to e herein; (g) joining said front and rear sections with adjustable coupling means to produce a finished javelin body; (h) applying a metal tip to the front end of said body; and (i) wrapping a cord grip around mid-portions of said body.
Claim 5
Dependent Claim
35 words
The method of claim 2 wherein said method further comprises the step of applying a mold release to said mandrel so that said mandrel can be removed from said front and rear sections after curing.
Claim 6
Dependent Claim
73 words
The method of claim 2 wherein said joining of said front and rear sections comprises: (a) threadably engaging joint means with said front section; (b) applying ring means over said joint means such that said ring means rests against the engaged end of said front section; (c) threadably engaging said rear section with the remainder of said joint means so that the engaged end of said rear section rests against said ring means.
Claim 7
Dependent Claim
20 words
The method of claim 2 wherein the cross-ply bias winding angle is ±10° to the central axis of said mandrel.
Claim 8
Dependent Claim
20 words
The method of claim 1 wherein said underlayer has a total thickness in the range of 0.4 to 0.6 mm.
Claim 9
Dependent Claim
20 words
The method of claim 6 wherein said overlayer has a total thickness in the range of 4 to 5 mm.
Claim 10
Dependent Claim
27 words
The method of claim 2 wherein said resin is a diglycidyl ether of bisphenol A having a curing temperature in the range of 250° to 350° F.
Claim 11
Dependent Claim
96 words
The method of claim 1 or 2 wherein said metal tip is a narrow right angle cone having a stud associated with its rear end and adapted to threadably engage an insert provided in the forward end of said body, and wherein the method further comprises the steps of: (a) placing a hollow spacer over said stud, regulating the degree of engagement between said tip and said forward end; and (b) engaging said stud and said insert so that said spacer contacts both said forward end of said body and the rear end of said tip.
Claim 12
Dependent Claim
19 words
The method of claim 9 wherein the method further comprises the step of bonding said tip to said body.
Claim 13
Dependent Claim
20 words
The method of claim 1 wherein the cross-ply bias winding angle is ±10° to the central axis of said mandrel.
Claim 14
Dependent Claim
44 words
The method of claim 4 wherein said method further comprises the step of tuning the javelin by varying the length of the adjustable coupling means which engages said front and rear sections, thereby altering the relative weight distribution between said front and rear sections.
Claim 15
Dependent Claim
36 words
The method of claim 12 wherein said method further comprises the step of locking said ring means onto said joint means, maintaining said lengths of said adjustable coupling means which engage said front and rear sections.
Claim 16
Dependent Claim
24 words
The method of claim 9 wherein said method further comprises the step of tuning the javelin by varying the length of said hollow spacer.
References Cited (Backward Citations)
US298111A
Cited
DE475103C
Cited
US664528A
Cited
US1145127A
Cited
FR539288A
Cited
US1527748A
Cited
US1552442A
Cited
US1569395A
Cited
US1731686A
Cited
US1994089A
Cited
CH178264A
Cited
US2044092A
Cited
US2122023A
Cited
US2196610A
Cited
US2214464A
Cited
GB608240A
Cited
US3269730A
Cited
US3232613A
Cited
US3368271A
Cited
US3491999A
Cited
US3674581A
Cited
US3787051A
Cited
US3889951A
Cited
US3902732A
Cited
US4023799A
Cited
US3981504A
Cited
US3953637A
Cited
US3969557A
Cited
DE2520624A1
Cited
US4015360A
Cited
US4043074A
Cited
US4135035A
Cited
US4070020A
Cited
US4084819A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-12 | 1987-03-14 | 1987-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-12 | 1991-03-14 | 1991-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-12 | 1995-03-14 | 1995-09-13 | $7700.00 | Window Closed / Lapsed |