US3735510A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for removing snow
Assignee: Dendix Brushes Ltd
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Filing: 1971-12-08
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Granted: 1973-05-29
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Expires: 1991-12-08
Abstract
Abstract A device for removing snow comprises a chamber having a forwardfacing horizontal slit in it from which air, supplied by a compressor, leaves, preferably with a velocity of at least 50 miles per hour, and lifts, by up to a few inches, snow on the surface to be cleared. Rotary displacing means, for example an auger or rotary brush, on the device displaces the lifted snow away from the path of movement of the device. The slit extends along substantially the whole length of the rotary displacing means, substantially parallel to the axis of rotation, and air from the slit passes, substantially perpendicular to said axis, under said rotary displacing means to lift the snow in front of the latter.
Inventors
- 👤 L Godfrey
- 👤 J Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:42
CPC Classifications
E; E01; E01H; E01H5/00; E01H5/04; E01H5/08; E01H5/09; E01H5/098; E01H1/00; E01H1/08; E01H1/0809; E01H1/0818; E01H5/092; F; F02; F02B; F02B1/00; F02B1/02; F02B1/04
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
192 words
A device for removing snow comprising a rotary snow displacement means mounted for rotation about an axis which is horizontal when the device travels over a flat horizontal surface and capable of displacing snow lying on said surface, a chamber behind said snow displacement means, portions of the chamber defining a slit in the wall thereof which has an effective width less than 0.1 inch and is close to the bottom of said snow displacement means and extends over substantially the whole length of said snow displacement means and is substantially parallel to the axis of rotation thereof, and an air compressor which is connected to the chamber and is capable of supplying to the chamber air which leaves the chamber through the slit with a velocity of at least 50 miles per hour, in a direction substantially perpendicular to the axis of rotation of said snow displacement means, and passes under said snow displacement means whereby snow on said surface is lifted by from a part of an inch to a few inches and is then displaced by said snow displacement means away from the path of movement of said device.
Claim 2
Independent Claim
192 words
A device for removing snow comprising a rotary snow displacement means mounted for rotation about an axis which is horizontal when the device travels over a flat horizontal surface and capable of displacing snow lying on said surface, a chamber behind said snow displacement means, portions of the chamber defining a slit in the wall thereof which has an effective width less than 0.1 inch and is close to the bottom of said snow displacement means and extends over substantially the whole length of said snow displacement means and is substantially parallel to the axis of rotation thereof, and an air compressor which is connected to the chamber and is capable of supplying to the chamber air which leaves the chamber through the slit with a velocity of at least 50 miles per hour, in a direction substantially perpendicular to the axis of rotation of said snow displacement means, and passes under said snow displacement means whereby snow on said surface is lifted by from a part of an inch to a few inches and is then displaced by said snow displacement means away from the path of movement of said device.
Claim 3
Dependent Claim
35 words
A device according to claim 1, in which the air compressor is capable of supplying to the chamber air which has a pressure of from 2 to 10 pounds per square inch in the chamber.
Claim 4
Dependent Claim
73 words
A device according to claim 1, in which the chamber is a horizontal tube having a cylindrical exterior, the device further comprising a tubular member which concentrically and closely surrounds the tube and which has portions defining a slit along it, and means for turning one of the tube and the tubular member with respect to the other about their common axis to bring the two slits into registry to a desired extent.
Claim 5
Dependent Claim
72 words
A device according to claim 1, wherein said snow displacement means comprises an auger, the device further comprising a chute near and having an entrance behind said auger, means adjacent said chute entrance for projecting up the chute snow which has been displaced by the auger, and a blade mounted behind the auger for scooping up snow, the lower edge of the blade being above the surface to be cleared of snow.
Claim 6
Dependent Claim
19 words
A device according to claim 4, in which the projecting means comprises a rotary impeller separate from the auger.
Claim 7
Dependent Claim
35 words
A device according to claim 1, in which said snow displacement means comprises an auger having flexible resilient material on it which sweeps the surface to be cleared of snow in use of the device.
Claim 8
Dependent Claim
17 words
A device according to claim 6, in which said flexible resilient material is steel wire in tufts.
Claim 9
Dependent Claim
45 words
A device according to claim 4, in which the auger displaces snow towards the center of its length and in which the auger comprises two axially aligned parts, the device further comprising a gear box between the two parts for driving both parts in unison.
Claim 10
Dependent Claim
30 words
A device according to claim 1, in which said snow displacement means comprises a rotary brush with its axis of rotation inclined to the direction of travel of the device.
Claim 11
Dependent Claim
19 words
A device according to claim 1, including at least one air cushion device for supporting said snow displacement means.
Claim 12
Independent Claim
192 words
A device for removing snow comprising a rotAry snow displacement means mounted for rotation about an axis which is horizontal when the device travels over a flat horizontal surface and capable of displacing snow lying on said surface, a chamber behind said snow displacement means, portions of the chamber defining a slit in the wall thereof which has a effective width less than 0.1 inch and is close to the bottom of said snow displacement means and extends over substantially the whole length of said snow displacement means and is substantially parallel to the axis of rotation thereof, and an air compressor which is connected to the chamber and is capable of supplying to the chamber air which leaves the chamber through the slit with a velocity of at least 50 miles per hour, in a direction substantially perpendicular to the axis of rotation of said snow displacement means, and passes under said snow displacement means whereby snow on said surface is lifted by from a part of an inch to a few inches and is then displaced by said snow displacement means away from the path of movement of said device.
Claim 13
Independent Claim
192 words
A device for removing snow comprising a rotAry snow displacement means mounted for rotation about an axis which is horizontal when the device travels over a flat horizontal surface and capable of displacing snow lying on said surface, a chamber behind said snow displacement means, portions of the chamber defining a slit in the wall thereof which has a effective width less than 0.1 inch and is close to the bottom of said snow displacement means and extends over substantially the whole length of said snow displacement means and is substantially parallel to the axis of rotation thereof, and an air compressor which is connected to the chamber and is capable of supplying to the chamber air which leaves the chamber through the slit with a velocity of at least 50 miles per hour, in a direction substantially perpendicular to the axis of rotation of said snow displacement means, and passes under said snow displacement means whereby snow on said surface is lifted by from a part of an inch to a few inches and is then displaced by said snow displacement means away from the path of movement of said device.
Claim 14
Independent Claim
209 words
A device for removing snow comprising a rotary snow displacement means mounted for rotation about an axis which is horizontal when the device travels over a flat horizontal surface and capable of displacing snow lying on said surface, a chamber behind said snow displacement means, portions of the chamber defining a slit in the wall thereof which is close to the bottom of said snow displacement means and extends over substantially the whole length of said snow displacement means and is substantially parallel to the axis of rotation thereof, a chute having an entrance adjacent said snow displacement means for carrying away snow which has been displaced by said snow displacement means and projecting it in a sideways-directed stream, and an air compressor which is connected to the chamber and is capable of supplying to the chamber air which leaves the chamber through the slit in a direction substantially perpendicular to the axis of rotation of said snow displacement means and passes under said snow displacement means whereby snow on said surface is lifted by from a part of an inch to a few inches and is then displaced by said snow displacement means and travels along said chute and is projected from said device in a sideways-directed stream.
Claim 15
Independent Claim
209 words
A device for removing snow comprising a rotary snow displacement means mounted for rotation about an axis which is horizontal when the device travels over a flat horizontal surface and capable of displacing snow lying on said surface, a chamber behind said snow displacement means, portions of the chamber defining a slit in the wall thereof which is close to the bottom of said snow displacement means and extends over substantially the whole length of said snow displacement means and is substantially parallel to the axis of rotation thereof, a chute having an entrance adjacent said snow displacement means for carrying away snow which has been displaced by said snow displacement means and projecting it in a sideways-directed stream, and an air compressor which is connected to the chamber and is capable of supplying to the chamber air which leaves the chamber through the slit in a direction substantially perpendicular to the axis of rotation of said snow displacement means and passes under said snow displacement means whereby snow on said surface is lifted by from a part of an inch to a few inches and is then displaced by said snow displacement means and travels along said chute and is projected from said device in a sideways-directed stream.
Claim 16
Dependent Claim
31 words
A device according to claim 12 wherein the effective width of said slit is less than 0.1 inch and air leaves it with a velocity at least 50 miles per hour.
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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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |