US3774322A - Snow-handling implement with belt-driven impeller and coacting labyrinthian baffle - Google Patents
Snow-handling implement with belt-driven impeller and coacting labyrinthian baffle Download PDFInfo
- Publication number
- US3774322A US3774322A US00191736A US3774322DA US3774322A US 3774322 A US3774322 A US 3774322A US 00191736 A US00191736 A US 00191736A US 3774322D A US3774322D A US 3774322DA US 3774322 A US3774322 A US 3774322A
- Authority
- US
- United States
- Prior art keywords
- impeller
- compartment
- flange
- drive
- snow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 238000007142 ring opening reaction Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000008030 elimination Effects 0.000 abstract 2
- 238000003379 elimination reaction Methods 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H5/00—Removing snow or ice from roads or like surfaces; Grading or roughening snow or ice
- E01H5/04—Apparatus propelled by animal or engine power; Apparatus propelled by hand with driven dislodging or conveying levelling elements, conveying pneumatically for the dislodged material
Definitions
- ABSTRACT To exemplify an implement to which the Plymouth, Wis.
- annular labyrinth baflle which comprises a ring carried by the snow thrower impeller and a stationary annular flange with which the ring coacts for centrifugal discharge of snow from the area about the impeller, thus eliminating mechanical driving connections and close tolerance clearances.
- the impeller rotor has blades mounted directly upon one of its faces, the other face including a pulley flange with which a disk with a complementary flange is unitarily connected to form a pulley.
- the drive through the pulley to theimpeller is independent of the drive to the traction wheels.
- the impeller is driven directly at its periphery, without requiring any drive connection to its shaft.
- FIG. 1 is a diagrammatic perspective view of a snow thrower exemplifying the invention.
- FIG. 2 is an enlarged detail view in cross section along the axis of the propulsion shaft.
- FIG. 3 is an enlarged cut away fragmentary sectional view showing details of the labyrinthian baffle.
- the engine 4 and guide handle 6 are connected with supporting and traction wheels at 8 upon which the traction wheel drive compartment 10 is likewise mounted.
- Ahead of compartment 10 is a belt drive compartment 11 and ahead of compartment 11 is a generally cylindrical impeller compartment or chanber 12 with adjustable chute 14 and deflector l6.
- Attached to the front of chamber 12 is a shroud l8 partially enclosing the augers which are mounted on shaft 22 driven from gear housing 21 and which serve to feed snow through the rear opening 24 of the shroud into the path of blades 26 which are part of the impeller 28. These blades throw the snow up the chute 14 fordischarge in a direction determined by the deflector 16.
- Power from the engine 4 is transmitted from the engine drive shaft 30 by means of pulley 32 and belt 34 to a driven pulley 36 in compartment 11 and splined at 38 to the shaft 40.
- Shaft 40 drives the traction wheel 8.
- the hub 42 of pulley 36 carries a bearing 44 wich is piloted on the shaft 46 to support a sleeve 48 which is fastened to shaft 46 by pin 45 and which provides a hub for the snow thrower impeller 28.
- Another bearing 50 mounted on the gear case 21 supports the forward end of the shaft 46.
- the snow thrower impeller 28 comprises a hollow pulley or body 27 having a forward generally radially extending wall 52 and a rear wall 54, the latter having a frusto-conical peripheral portion 56 coacting with an oppositely formed frusto-conical flange 58 to receive V-belt 60 reeved around pulley 57 mounted on the engine drive shaft 30 in axially spaced parallel relation to the drive pulley 32.
- Projecting axially from the forward wall 52 of the hollow pulley 27 are several (two or three) snow-throwing arms 26 which have trajectories aligned with the chute 14 from which the snow is to be ejected.
- the front wall 52 of pulley 27 is provided with an annular rearwardly turned flange 64 of substantially cylindrical outline.
- the margin 66 of flange 64 extends over shoulder 68 of a ring 70 which is a fixed part of the housing and encircles the periphery 72 of the hollow pulley 27.
- the inner periphery of ring 70 extends substantially radially from the cylindrical portion 72 of the pulley.
- the ring 70 turns rearwardly and thence outwardly again at 74 to its supporting sleeve portions 76 (FIG. 2).
- the flange 64 of the impeller body 27 is provided with small wiper blades 59 spaced widely about the periphery of the flange 64. These blades keep the zone about the impeller free of ice.
- the blades 59 and friction of the rotating impeller on air and snow induce impact and centrifugal forces on the air and snow which prevent snow from moving from the impeller compartment 12 toward and into the belt drive compartment 11.
- the aforedescribed structure also affords an air inlet opening 61 and air outlet opening 63 (FIG. 3) for flow of air in the direction of arrows centrifugally induced by rotation of the impeller.
- This air flow also serves to exclude movement of snow from the impeller compartment 12 into the belt drive compartment 11.
- the impeller compartment 12 tends to be at a somewhat reduced pressure. This also helps induce air flow in the direction of arrows 65.
- the impeller body 27 has sufficient axial thickness (because it is hollow) to provide clearance around its periphery for the labyrinthian baffle path provided by the flanges 64, 66, 68 and 70. This is so effective in excluding snow from the belt drive compartment 11 that the usual bearing partition is completely eliminated.
- the rotor 28, instead of being driven by a shaft, is directly belt-driven independently of any shaft, thus eliminating considerable expense in manufacture.
- a snow-handling implement comprising a rotatable part, means for mounting said part for rotating on a predetermined axis, said part having snow-throwing blades projecting to rotate about the axis on which the part rotates, and means engaging the periphery of such part for efi'ecting rotation of said part and blades, a labyrinthian baffle comprising a first flange encircling said part, said part having a lapping flange coacting therewith.
- a snow-throwing implement comprising the combination with means providing a drive compartment and an impeller compartment having discharge means comprising a chute, a first shaft in the drive compartment, a second shaft extending into the impeller compartment, an impeller mounted on the second shaft and free to rotate with respect to the first shaft, said impeller being disposed partly in the impeller compartment and having a groove in the drive compartment, snowpropelling blade means on the impeller in the impeller compartment, and a labyrinthian baffle between said compartments and comprising a relatively stationary annular flange encircling the impeller between said compartments and provided with an axial offset shoulder, and a baffle ring mounted on the impeller and having a peripheral marginal portion extending axially in lapping relation to the shoulder, a belt wholly disposed in the drive compartment and engaged in said groove, and means for actuating the belt.
- a snow-throwing implement comprising the combination with means providing in series a screw feed compartment, an impeller compartment, a belt drive compartment and a traction drive compartment, coaxial shafts leading from said belt drive compartment in opposite directions, one of said shafts having a bearing at one side of the belt drive compartment and the other spanning the impeller compartment and leading to the screw feed compartment, a pair of driven pulleys mounted upon proximate ends of the respective shafts,
- the impeller compartment having a wall encircling the driven pulley which is on the shaft spanning the impeller compartment, said last mentioned pulley having a wall portion having a peripheral flange adjacent a flange with which the wall of the impeller compartment is provided and which encircles the last mentioned pulley.
- a snow thrower having a drive compartment, an impeller compartment, an impeller in said impeller compartment and drive means therefor in the drive compartment
- the improvement for excluding transfer of snow from the impeller compartment to the drive compartment which comprises a baffle ring between said compartments, said impeller having a portion adjacent said ring, said ring and said impeller portion defining a labyrinth which centrifugally excludes snow from moving from the impeller compartment to the drive compartment when the impeller is rotated with respect to said ring.
- baffle ring has an opening
- said impeller having a body within said opening but spaced slightly from the baffle ring, said ring having a shoulder spaced outwardly from said opening, said impeller having a flange in outwardly spaced relation to said shoulder.
- said impeller body comprises a hollow drum with a substantially cylindrical wall within the ring opening, said drum having an end wall with peripheral margin turned to constitute said flange.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims (13)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US19173671A | 1971-10-22 | 1971-10-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3774322A true US3774322A (en) | 1973-11-27 |
Family
ID=22706741
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00191736A Expired - Lifetime US3774322A (en) | 1971-10-22 | 1971-10-22 | Snow-handling implement with belt-driven impeller and coacting labyrinthian baffle |
Country Status (2)
Country | Link |
---|---|
US (1) | US3774322A (en) |
CA (1) | CA963027A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4068397A (en) * | 1977-02-02 | 1978-01-17 | Gilson Brothers Company | Snowblower discharge guide and control arrangement therefor |
US4378644A (en) * | 1981-02-12 | 1983-04-05 | Emerson Electric Co. | Powered snow removal apparatus |
DE3723989A1 (en) * | 1986-07-23 | 1988-02-04 | Honda Motor Co Ltd | Self-propelled snow-clearing machine |
EP0595885A1 (en) * | 1991-07-12 | 1994-05-11 | SUND, Lloyd, P. | Rotary sweeper attachment |
US5735064A (en) * | 1996-05-21 | 1998-04-07 | Holl; Trygve A. | Operational control mechanism |
US20090183395A1 (en) * | 2008-01-17 | 2009-07-23 | Yamaha Motor Power Products Kabushiki Kaisha | Snow blower |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2610414A (en) * | 1949-05-02 | 1952-09-16 | Vanvick Isak | Rotary snowplow |
US2675660A (en) * | 1954-04-20 | Disk type mower | ||
US2776505A (en) * | 1952-11-08 | 1957-01-08 | Harry L Maloney | Rotary snow remover |
US3052048A (en) * | 1960-09-19 | 1962-09-04 | Jari Products Inc | Device for removing snow |
US3303588A (en) * | 1963-09-25 | 1967-02-14 | Wausau Iron Works | Rotary snow plow |
US3319363A (en) * | 1967-05-16 | Snow remover attachment for power lawn mowers |
-
1971
- 1971-10-22 US US00191736A patent/US3774322A/en not_active Expired - Lifetime
-
1972
- 1972-07-11 CA CA146,869A patent/CA963027A/en not_active Expired
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2675660A (en) * | 1954-04-20 | Disk type mower | ||
US3319363A (en) * | 1967-05-16 | Snow remover attachment for power lawn mowers | ||
US2610414A (en) * | 1949-05-02 | 1952-09-16 | Vanvick Isak | Rotary snowplow |
US2776505A (en) * | 1952-11-08 | 1957-01-08 | Harry L Maloney | Rotary snow remover |
US3052048A (en) * | 1960-09-19 | 1962-09-04 | Jari Products Inc | Device for removing snow |
US3303588A (en) * | 1963-09-25 | 1967-02-14 | Wausau Iron Works | Rotary snow plow |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4068397A (en) * | 1977-02-02 | 1978-01-17 | Gilson Brothers Company | Snowblower discharge guide and control arrangement therefor |
US4378644A (en) * | 1981-02-12 | 1983-04-05 | Emerson Electric Co. | Powered snow removal apparatus |
DE3723989A1 (en) * | 1986-07-23 | 1988-02-04 | Honda Motor Co Ltd | Self-propelled snow-clearing machine |
EP0595885A1 (en) * | 1991-07-12 | 1994-05-11 | SUND, Lloyd, P. | Rotary sweeper attachment |
EP0595885A4 (en) * | 1991-07-12 | 1995-03-29 | Lloyd P Sund | Rotary sweeper attachment. |
US5735064A (en) * | 1996-05-21 | 1998-04-07 | Holl; Trygve A. | Operational control mechanism |
US20090183395A1 (en) * | 2008-01-17 | 2009-07-23 | Yamaha Motor Power Products Kabushiki Kaisha | Snow blower |
US7730642B2 (en) * | 2008-01-17 | 2010-06-08 | Yamaha Motor Power Products Kabushiki Kaisha | Snow blower |
Also Published As
Publication number | Publication date |
---|---|
CA963027A (en) | 1975-02-18 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: GENERAL ELECTRIC CREDIT CORPORATION 8131 LBJ FREEW Free format text: SECURITY INTEREST;ASSIGNOR:GILSON BROTHERS COMPANY A CORP OF DE;REEL/FRAME:004335/0243 |
|
AS | Assignment |
Owner name: GILSON BROTHERS COMPANY Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:GENERAL ELECTRIC CREDIT CORPORATION, A NY CORP.;REEL/FRAME:004940/0620 Effective date: 19870903 Owner name: OUTBOARD MARINE CORPORATION, A CORP. OF DE,ILLINOI Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LAWN-BOY, INC., A DE CORP.;REEL/FRAME:004940/0611 Effective date: 19870904 Owner name: LAWN-BOY, INC. Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:GILSON BROTHERS COMPANY;REEL/FRAME:004940/0614 Effective date: 19870906 Owner name: OUTBOARD MARINE CORPORATION, 100 SEAHORSE DRIVE, W Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LAWN-BOY, INC., A DE CORP.;REEL/FRAME:004940/0611 Effective date: 19870904 |
|
AS | Assignment |
Owner name: LAWN-BOY INC., A CORP OF DELAWARE, WISCONSIN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:OUTBOARD MARINE CORPORATION,;REEL/FRAME:005277/0255 Effective date: 19900619 |
|
AS | Assignment |
Owner name: TORO COMPANY, THE, MINNESOTA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LAWN-BOY INC.;REEL/FRAME:007029/0339 Effective date: 19940318 |