US4567623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Leaf and debris collector
Assignee: Individual
•
Filing: 1984-09-26
•
Granted: 1986-02-04
•
Expires: 2004-09-26
Abstract
Abstract An improved leaf and debris collection apparatus is described which features a centrifugal fan mounted on a wagon and driven by an engine, the inlet side of the fan being connected to an inlet head just above ground level and its outlet side connected to an outlet plenum, comprising an outlet port for attachment of a disposable bag. A punch is provided for punching a large number of holes in the disposable bag so that air pressure is not collected within, so that the disposable bag can be used to collect the leaves and debris. In a preferred embodiment, the plenum has holes formed therein for release of air pressure, and the bag is disposed vertically beneath the plenum.
Inventors
- 👤 John H. Walton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:02
CPC Classifications
A; A47; A47L; A47L9/00; A47L9/10; A47L9/14; A47L9/1418; A47L5/00; A47L5/12; A47L5/14; E; E01; E01H; E01H1/00; E01H1/08; E01H1/0809; E01H1/0827; E01H1/0836; Y; Y10; Y10T; Y10T83/00; Y10T83/929; Y10T83/9314
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
208 words
A machine adapted to be mounted on wheels for the collection and disposal of leaves and other debris comprising: a frame mounted on wheels for movement across the ground; an enclosed fan mounted on said frame for developing a suction at an inlet port and a pressure at an outlet port; an engine mounted on said frame for driving said fan; an intake hood mounted on said frame; a plenum mounted on said frame, said plenum having an inlet port and an outlet port; piping means connecting said inlet port of said fan to said intake hood; a non-enclosed disposable bag adapted to be supported on the vehicle and detachably secured to said outlet port of said plenum to receive the air and leaves and other debris passing therethrough, said disposable bag having a plurality of spaced holes therein whereby air can be exhausted from said bag without loss of leaves and other debris blowing thereinto; and said plenum having a number of holes therein for reducing air pressure in said plenum to lower the pressure sufficiently at said outlet port of said plenum so that said disposable bag is not stretched excessively by the air passing into said disposable bag in the absence of bag enclosing structure.
Claim 2
Dependent Claim
208 words
A machine adapted to be mounted on wheels for the collection and disposal of leaves and other debris comprising: a frame mounted on wheels for movement across the ground; an enclosed fan mounted on said frame for developing a suction at an inlet port and a pressure at an outlet port; an engine mounted on said frame for driving said fan; an intake hood mounted on said frame; a plenum mounted on said frame, said plenum having an inlet port and an outlet port; piping means connecting said inlet port of said fan to said intake hood; a non-enclosed disposable bag adapted to be supported on the vehicle and detachably secured to said outlet port of said plenum to receive the air and leaves and other debris passing therethrough, said disposable bag having a plurality of spaced holes therein whereby air can be exhausted from said bag without loss of leaves and other debris blowing thereinto; and said plenum having a number of holes therein for reducing air pressure in said plenum to lower the pressure sufficiently at said outlet port of said plenum so that said disposable bag is not stretched excessively by the air passing into said disposable bag in the absence of bag enclosing structure.
Claim 3
Dependent Claim
62 words
A machine according to claim 1 including flexible duct means having a hand operable auxiliary intake hood connected to one end thereof, and means for connecting the other end of said flexible duct means to said inlet port of said fan when said first-named piping means is disconnected from said inlet port of said fan to render said first-named intake hood inoperative.
Claim 4
Dependent Claim
79 words
A machine according to claim 1 or 2 including a flexible hose assembly adapted to be connected to said second-named piping means, and valve means associated with said second-named piping means for connecting said outlet port of said fan to said flexible hose assembly and for concurrently blocking flow of air from said outlet port of said fan to said inlet of said plenum whereby the flow of air from said fan is directed through said flexible hose assembly.
Claim 5
Dependent Claim
242 words
A machine adapted to be mounted on a vehicle for the collection and disposal of leaves and other debris comprising: an enclosed fan mounted on the vehicle for developing a suction at an inlet port and a pressure at an outlet port; an engine mounted on the vehicle for driving said fan; an intake hood mounted on the vehicle; a plenum vertically mounted on the vehicle, said plenum having an inlet port and an outlet port; piping means connecting said inlet port of said fan to said intake hood; piping means conecting said outlet port of said fan to said inlet port of said plenum; means on said plenum adjacent said outlet port thereof for attachment of a disposable bag for containment of leaves and other debris; a non-enclosed disposable bag adapted to be vertically supported on the vehicle and detachably secure to said outlet port at the bottom of said plenum to receive the air and leaves and other debris passing therethrough, said disposable bag having a plurality of spaced holes therein whereby air can be exhausted from said bag without loss of leaves and other debris blowing thereinto; and said plenum having a number of holes therein for reducing air pressure in said plenum to lower the pressure sufficiently at said outlet port of said plenum so that said disposable bag is not stretched excessively by the air passing into said disposable bag in the absence of bag enclosing structure.
Claim 6
Dependent Claim
242 words
A machine adapted to be mounted on a vehicle for the collection and disposal of leaves and other debris comprising: an enclosed fan mounted on the vehicle for developing a suction at an inlet port and a pressure at an outlet port; an engine mounted on the vehicle for driving said fan; an intake hood mounted on the vehicle; a plenum vertically mounted on the vehicle, said plenum having an inlet port and an outlet port; piping means connecting said inlet port of said fan to said intake hood; piping means conecting said outlet port of said fan to said inlet port of said plenum; means on said plenum adjacent said outlet port thereof for attachment of a disposable bag for containment of leaves and other debris; a non-enclosed disposable bag adapted to be vertically supported on the vehicle and detachably secure to said outlet port at the bottom of said plenum to receive the air and leaves and other debris passing therethrough, said disposable bag having a plurality of spaced holes therein whereby air can be exhausted from said bag without loss of leaves and other debris blowing thereinto; and said plenum having a number of holes therein for reducing air pressure in said plenum to lower the pressure sufficiently at said outlet port of said plenum so that said disposable bag is not stretched excessively by the air passing into said disposable bag in the absence of bag enclosing structure.
References Cited (Backward Citations)
US3147510A
Cited
US3241173A
Cited
US3460185A
Cited
US3461479A
Cited
US3710412A
Cited
US3790986A
Cited
US3918119A
Cited
US3813725A
Cited
US3903565A
Cited
US3940827A
Cited
US3968938A
Cited
US4467494A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |