US3874801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for marking paved surfaces
Assignee: 3M Co
•
Filing: 1973-04-13
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Granted: 1975-04-01
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Expires: 1993-04-13
Abstract
Abstract A new marking apparatus for applying fusible organic-based particulate marking material through a flame to form a continuous marking on a paved surface. In this apparatus, forced air means forces a fuel-air mixture at high velocity through a chute means directed toward the paved surface. A set of kindling nozzles, also connected to the fuel supply, is disposed circumferentially around the end of the chute means, and ignites the fuel-air mixture passing through the chute means. Marking material is fed from a supply hopper into the chute means.
Inventors
- 👤 Lyall B White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:25
CPC Classifications
E; E01; E01C; E01C23/00; E01C23/16; E01C23/20; E01C23/206
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
190 words
Apparatus for applying a fusible organic-based particulate marking material to paved surfaces to form instantly trafficbearing markings on the paved surfaces, comprising a frame supported by wheels and, mounted on the frame, 1. forced air means, 2. chute means connected to the forced air means and directed toward a paved surface over which the apparatus is moved; 3. a set of kindling nozzles disposed circumferentially around the end of the chute means and connected to the forced air means; 4. container means for particulate marking material disposed above said chute means and connected through metering means to said chute means so as to supply particulate marking material to said chute means; and 5. gaseous fuel means comprising a supply tank and conduit means connected between the supply tank and the chute means and the set of kindling nozzles so as to introduce gaseous fuel into the air stream moving through the chute means and kindling nozzles; the forced air means supplying air through the chute means at a velocity such that a flame ignited at the end of the chute means is spaced from the end of the chute means.
Claim 2
Dependent Claim
190 words
Apparatus for applying a fusible organic-based particulate marking material to paved surfaces to form instantly trafficbearing markings on the paved surfaces, comprising a frame supported by wheels and, mounted on the frame, 1. forced air means, 2. chute means connected to the forced air means and directed toward a paved surface over which the apparatus is moved; 3. a set of kindling nozzles disposed circumferentially around the end of the chute means and connected to the forced air means; 4. container means for particulate marking material disposed above said chute means and connected through metering means to said chute means so as to supply particulate marking material to said chute means; and 5. gaseous fuel means comprising a supply tank and conduit means connected between the supply tank and the chute means and the set of kindling nozzles so as to introduce gaseous fuel into the air stream moving through the chute means and kindling nozzles; the forced air means supplying air through the chute means at a velocity such that a flame ignited at the end of the chute means is spaced from the end of the chute means.
Claim 3
Dependent Claim
20 words
chute means connected to the forced air means and directed toward a paved surface over which the apparatus is moved;
Claim 4
Dependent Claim
20 words
chute means connected to the forced air means and directed toward a paved surface over which the apparatus is moved;
Claim 5
Dependent Claim
25 words
Apparatus of claim 1 in which the forced air means is an air blower that comprises a fan blade enclosed in a generally cylindrical housing.
Claim 6
Dependent Claim
37 words
chute means having a straight passageway connected directly over its whole cross-sectional area to the housing of the air blower means and directed at an inclined angle toward a paved surface over which the apparatus is moved;
Claim 7
Dependent Claim
37 words
chute means having a straight passageway connected directly over its whole cross-sectional area to the housing of the air blower means and directed at an inclined angle toward a paved surface over which the apparatus is moved;
Claim 8
Dependent Claim
49 words
a set of kindling nozzles disposed circumferentially around the end of the chute means, terminating downstream from the end of the chute means, directed inwardly toward the axis of the chute means, and connected to the air blower means through an annular manifold arranged coaxially around the chute means;
Claim 9
Dependent Claim
49 words
a set of kindling nozzles disposed circumferentially around the end of the chute means, terminating downstream from the end of the chute means, directed inwardly toward the axis of the chute means, and connected to the air blower means through an annular manifold arranged coaxially around the chute means;
Claim 10
Dependent Claim
27 words
Apparatus of claim 1 in which the forced air means is connected to the container means so as to apply a positive pressure within the container means.
Claim 11
Dependent Claim
21 words
a set of kindling nozzles disposed circumferentially around the end of the chute means and connected to the forced air means;
Claim 12
Dependent Claim
21 words
a set of kindling nozzles disposed circumferentially around the end of the chute means and connected to the forced air means;
Claim 13
Dependent Claim
32 words
container means for particulate marking material disposed above said chute means and connected through metering means to said chute means so as to supply particulate marking material to said chute means; and
Claim 14
Dependent Claim
32 words
container means for particulate marking material disposed above said chute means and connected through metering means to said chute means so as to supply particulate marking material to said chute means; and
Claim 15
Dependent Claim
34 words
Apparatus of claim 1 in which the downstream ends of the kindling nozzles terminate slightly downstream from the end of the chute means and are directed inwardly toward the axis of the chute means.
Claim 16
Dependent Claim
32 words
container means for particulate marking material disposed above said chute means and connected through metering means to said chute means so as to supply particulate marking material to said chute means; and
Claim 17
Dependent Claim
32 words
container means for particulate marking material disposed above said chute means and connected through metering means to said chute means so as to supply particulate marking material to said chute means; and
Claim 18
Dependent Claim
77 words
gaseous fuel means comprising a supply tank and conduit means connected between the supply tank and the chute means and the set of kindling nozzles so as to introduce gaseous fuel into the air stream moving through the chute means and kindling nozzles; the air blower means supplying air through the chute means at a velocity such that a flame ignited at the end of the chute means is spaced from the end of the chute means.
Claim 19
Dependent Claim
77 words
gaseous fuel means comprising a supply tank and conduit means connected between the supply tank and the chute means and the set of kindling nozzles so as to introduce gaseous fuel into the air stream moving through the chute means and kindling nozzles; the air blower means supplying air through the chute means at a velocity such that a flame ignited at the end of the chute means is spaced from the end of the chute means.
Claim 20
Dependent Claim
32 words
Apparatus for applying a fusible organic-based particulate marking material to paved surfaces to form instantly traffic-bearing markings on the paved surfaces, comprising a frame supported by wheels and, mounted on the frame,
Claim 21
Dependent Claim
32 words
Apparatus for applying a fusible organic-based particulate marking material to paved surfaces to form instantly traffic-bearing markings on the paved surfaces, comprising a frame supported by wheels and, mounted on the frame,
Claim 22
Dependent Claim
77 words
gaseous fuel means comprising a supply tank and conduit means connected between the supply tank and the chute means and the set of kindling nozzles so as to introduce gaseous fuel into the air stream moving through the chute means and kindling nozzles; the forced air means supplying air through the chute means at a velocity such that a flame ignited at the end of the chute means is spaced from the end of the chute means.
Claim 23
Dependent Claim
77 words
gaseous fuel means comprising a supply tank and conduit means connected between the supply tank and the chute means and the set of kindling nozzles so as to introduce gaseous fuel into the air stream moving through the chute means and kindling nozzles; the forced air means supplying air through the chute means at a velocity such that a flame ignited at the end of the chute means is spaced from the end of the chute means.
Claim 24
Dependent Claim
27 words
Apparatus of claim 5 in which the air blower means is connected to the container means so as to apply a positive pressure within the container means.
Claim 25
Dependent Claim
18 words
Apparatus of claim 5 in which the chute means comprises a set of barrels of large cross-sectional area.
Claim 26
Dependent Claim
20 words
Apparatus of claim 5 in which the conduit to the chute means terminates in needle-size openings inside the chute means.
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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) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |