US4433813A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for forming wood fibres
Assignee: Individual
•
Filing: 1980-08-05
•
Granted: 1984-02-28
•
Expires: 2000-08-05
Abstract
Abstract A method of forming wood fibres for use in the production of a riding surface comprises feeding wood chips having a length, in the grain direction, of from 18 mm to 35 mm, to a milling machine adjusted to break the wood chips into wood fibres, the lengths of the fibres produced by the milling machine being substantially in accordance with the following percentages, by volume, of the total volume: -Wood fibre length Percentage of Total Fibre -0 mm-5 mm 10%-20% - 5 mm-15 mm 40%-55% -15 mm-35 mm 35%-50% - It is found that a surface formed from a compacted layer, several inches deep, of fibres produced by the above method has excellent characteristics for horse riding and these characteristics are not unduly affected by variations in weather conditions.
Inventors
- 👤 Rodney Whatton
- 👤 Timothy W. Gilder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:21
CPC Classifications
B; B02; B02C; B02C13/00; B02C13/02; B02C13/04; B02C21/00; B02C21/02; B27; B27L; B27L11/00; B27L11/08
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
92 words
A method of forming wood fibres for use in the production of a riding surface comprising feeding wood chips having a length, in the grain direction, of from 18 mm to 35 mm, to a milling machine adjusted to break the wood chips into wood fibres, the lengths of the fibres produced by the milling machine being substantially in accordance with the following percentages by volume, of the total volume: ______________________________________
Wood fibre length
Percentage of Total Fibre
______________________________________
0 mm-5 mm 10%-20%
5 mm-15 mm 40%-55%
15 mm-35 mm 35%-50%
______________________________________
Claim 2
Independent Claim
92 words
A method of forming wood fibres for use in the production of a riding surface comprising feeding wood chips having a length, in the grain direction, of from 18 mm to 35 mm, to a milling machine adjusted to break the wood chips into wood fibres, the lengths of the fibres produced by the milling machine being substantially in accordance with the following percentages by volume, of the total volume: ______________________________________
Wood fibre length
Percentage of Total Fibre
______________________________________
0 mm-5 mm 10%-20%
5 mm-15 mm 40%-55%
15 mm-35 mm 35%-50%
______________________________________
Claim 3
Dependent Claim
42 words
A method of forming wood fibres according to claim 1, comprising the preliminary step of feeding timber into a wood chipping machine adjusted to produce said wood chips having a length, in the grain direction, of from 18 mm to 35 mm.
Claim 4
Dependent Claim
18 words
A method according to claim 1, wherein the mean length of the wood chips is substantially 25 mm.
Claim 5
Dependent Claim
25 words
A method according to claim 1, comprising the further step of adding liquid to the wood chips, before milling, to adjust the moisture content thereof.
Claim 6
Dependent Claim
20 words
A method according to claim 4, wherein the moisture content is adjusted to be in the region of 45% .
Claim 7
Dependent Claim
54 words
A method according to claim 1, wherein the milling machine comprises a plurality of coaxially rotating elements each having mounted at the periphery thereof a plurality of hamers which, as the elements rotate, cooperate with a closely encircling peripheral surface to break the wood chips into fibres before passing the fibres through a screen.
Claim 8
Dependent Claim
15 words
A method according to claim 6, wherein the screen has a 25 mm mesh size.
Claim 9
Dependent Claim
24 words
A method according to claim 1, wherein at least a major proportion of the timber from which said wood chips are formed is hardwood.
Claim 10
Dependent Claim
27 words
A method according to claim 1, wherein at least a proportion of the timber from which said wood chips are formed comprises whole natural timber including bark.
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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) | 1987-02-27 | 1987-08-29 | 1988-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-27 | 1991-08-29 | 1992-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-27 | 1995-08-29 | 1996-02-28 | $7700.00 | Window Closed / Lapsed |