US3818688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composite integrated rake and apparatus and method of manufacture thereof
Assignee: Individual
•
Filing: 1972-06-27
•
Granted: 1974-06-25
•
Expires: 1992-06-27
Abstract
Abstract An article of manufacture in the form of a composite integrated rake having a series of parallel or radially aligned resin bonded tines each integral at a common end to a resin bonded stockhead. Each of the tines have substantially unidirectional reinforcement comprising parallel rovings of filamentary material contiguous with a part of the stockhead. The stockhead comprises, in combination with contiguous tine rovings, superimposed unidirectional filamentary rovings transposed in a direction transverse to the direction of the contiguous tine rovings. The method of manufacturing the rake includes the reciprocal passage of resin dipped rovings deposited in spaced slots forming rake tines in combination with transversely disposed resin dipped rovings deposited before and/or after depositing of the tine roving to form the integrated stockhead of the rake, followed by curing of the composite rake structure.
Inventors
- 👤 W Drummond
- 👤 W Hegedus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:45
CPC Classifications
A; A01; A01D; A01D7/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
77 words
In a composite integrated rake structure, said rake comprising a resin bonded stockhead, a series of resin bonded rake tines projecting from said stockhead and integrally formed therewith, each of said tines having coextensive substantially unidirectional reinforcement comprising rovings of filamentary material one end of which penetrates said stockhead, said stockhead including said penetrating ends of said tine rovings in combination with superimposed unidirectional filamentary rovings disposed therein in a substantially transverse direction relative to the former.
Claim 2
Dependent Claim
77 words
In a composite integrated rake structure, said rake comprising a resin bonded stockhead, a series of resin bonded rake tines projecting from said stockhead and integrally formed therewith, each of said tines having coextensive substantially unidirectional reinforcement comprising rovings of filamentary material one end of which penetrates said stockhead, said stockhead including said penetrating ends of said tine rovings in combination with superimposed unidirectional filamentary rovings disposed therein in a substantially transverse direction relative to the former.
Claim 3
Dependent Claim
18 words
The composite integrated rake structure of claim 1 characterized in that said tines have imparted thereto a curvature.
Claim 4
Dependent Claim
27 words
The composite integrated rake structure of claim 2 characterized in that the radius of curvature of said tines is within the range of 6 to 30 inches.
Claim 5
Dependent Claim
25 words
The composite integrated rake structure of claim 1 characterized in that a portion of the projecting ends of said tines have imparted thereto a curvature.
Claim 6
Dependent Claim
24 words
The composite integrated rake structure of claim 4 characterized in that the radius of curvature is within the range of 2 to 4 inches.
Claim 7
Dependent Claim
17 words
The composite integrated rake structure of claim 1 characterIzed by a filler material added to said resin.
Claim 8
Dependent Claim
20 words
The composite integrated rake structure of claim 1 characterized in that said filamentary materials comprise resin impregnated glass fiber rovings.
Claim 9
Dependent Claim
20 words
The composite integrated rake structure of claim 1 characterized in that said filamentary materials comprise resin impregnated carbon fiber rovings.
Claim 10
Dependent Claim
32 words
The composite integrated rake structure of claim 1 characterized in that said penetrating ends of said tine unidirectional filamentary material are sandwiched between said transverse superimposed unidirectional filamentary material in said stockhead.
Claim 11
Dependent Claim
18 words
The composite integrated rake structure of claim 1 characterized in that said resin is a thermoplastic resin material.
Claim 12
Dependent Claim
18 words
The composite integrated rake structure of claim 1 characterized in that said resin is a thermoset resin material.
Claim 13
Dependent Claim
94 words
In a composite integrated rake structure, said rake comprising a resin bonded stockhead, a series of resin bonded rake tines projecting from said stockhead and integrally formed therewith, each of said tines having coextensive substantially unidirectional reinforcement comprising rovings of filamentary material one end of which penetrates said stockhead, said stockhead including said penetrating ends of said tine unidirectional filamentary material in combination with superimposed strand filamentary material disposed therein in a direction substantially transverse relative to said unidirectional rovings, said filamentary materials being unitarily resin bonded to produce said composite integrated rake structure.
Claim 14
Dependent Claim
94 words
In a composite integrated rake structure, said rake comprising a resin bonded stockhead, a series of resin bonded rake tines projecting from said stockhead and integrally formed therewith, each of said tines having coextensive substantially unidirectional reinforcement comprising rovings of filamentary material one end of which penetrates said stockhead, said stockhead including said penetrating ends of said tine unidirectional filamentary material in combination with superimposed strand filamentary material disposed therein in a direction substantially transverse relative to said unidirectional rovings, said filamentary materials being unitarily resin bonded to produce said composite integrated rake structure.
Claim 15
Dependent Claim
87 words
In a composite integrated rake structure, said rake comprising a series of radially disposed resin bonded tines each integrally joined at one end to a resin bonded stockhead, each of said tines having coextensive substantially undirectional reinforcement comprising rovings of filamentary material one end of which penetrates said stockhead, said stockhead including said penetrating ends of said tine rovings in combination with superimposed unidirectional filamentary rovings disposed in a substantially transverse direction relative to the former, said rovings resin bonded to produce said composite integrated rake structure.
Claim 16
Dependent Claim
87 words
In a composite integrated rake structure, said rake comprising a series of radially disposed resin bonded tines each integrally joined at one end to a resin bonded stockhead, each of said tines having coextensive substantially undirectional reinforcement comprising rovings of filamentary material one end of which penetrates said stockhead, said stockhead including said penetrating ends of said tine rovings in combination with superimposed unidirectional filamentary rovings disposed in a substantially transverse direction relative to the former, said rovings resin bonded to produce said composite integrated rake structure.
Claim 17
Dependent Claim
23 words
The composite integrated rake structure of claim 13 characterized in that said stockhead transverse rovings are a series of spaced groups of rovings.
Claim 18
Dependent Claim
33 words
The composite integrated rake structure of claim 14 characterized in that said spaced stockhead transverse rovings are arcuate in extent, the radii of which are common with that of said radially disposed tines.
Claim 19
Dependent Claim
29 words
The composite integral rake structure of claim 13 characterized in that said spaced stockhead transverse rovings transverse over and under said tine rovings to form a composite sandwich stockhead.
Claim 20
Dependent Claim
29 words
The composite integral rake structure of claim 13 characterized in that said stockhead comprises stand mat filamentary material transposed in a direction substantially transverse relative to said unidirectional rovings.
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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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |