Patent US4138830A successfully refreshed from Google Patents.
US4138830A
Expired / Lapsed
US
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Snow thrower with combined discharge vane support and strike-off wall
Assignee: SIMPLICITY MANUFACTURING COMPANY PORT WASHINGTON WI A CORP OF WI
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Filing: 1978-02-24
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Granted: 1979-02-13
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Expires: 1998-02-24
Abstract
Abstract A compact, lightweight snow thrower having a power driven impeller rotating about a horizontal, transverse axis to throw snow upwardly and forwardly through a chute which is substantially coextensive in width with the axial length of the impeller. A plurality of laterally spaced upright vanes are disposed in and pivotally connected to the upper end of the chute for the purpose of directing the discharge of snow. The chute includes a front wall portion which serves as a support for the discharge directing vanes and as a strike-off wall preventing jamming of the discharge chute when the snow thrower encounters deep snow. Snow thrown by the impeller against the front wall portion tends to fall down because of its vertical disposition.
Inventors
- 👤 Alan L. Chase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:24
CPC Classifications
E; E01; E01H; E01H5/00; E01H5/04; E01H5/045
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
167 words
In a snow thrower having a powered impeller at the front thereof rotatable about a horizontal transverse axis, a discharge chute coextensive with and disposed above the impeller and discharge directing vanes in the discharge chute for directing snow thrown therethrough by the impeller, the improvement characterized by wall means defining a housing including laterally spaced sidewalls, the lower portions of which support opposite ends of said impeller and the upper ends of which form the sidewall portions of said chute, a rear wall curving upwardly from a scraper edge and having an upper portion forming the rear wall portion of said chute and a front wall portion adjacent the front end of said sidewalls forming the front wall of said chute, said front wall portion extending substantially vertically when the snow thrower is in its normal working position, and a plurality of laterally spaced upright vanes having their upper front and upper rear parts pivotally connected to the upper portions of said front and rear walls.
Claim 2
Dependent Claim
167 words
In a snow thrower having a powered impeller at the front thereof rotatable about a horizontal transverse axis, a discharge chute coextensive with and disposed above the impeller and discharge directing vanes in the discharge chute for directing snow thrown therethrough by the impeller, the improvement characterized by wall means defining a housing including laterally spaced sidewalls, the lower portions of which support opposite ends of said impeller and the upper ends of which form the sidewall portions of said chute, a rear wall curving upwardly from a scraper edge and having an upper portion forming the rear wall portion of said chute and a front wall portion adjacent the front end of said sidewalls forming the front wall of said chute, said front wall portion extending substantially vertically when the snow thrower is in its normal working position, and a plurality of laterally spaced upright vanes having their upper front and upper rear parts pivotally connected to the upper portions of said front and rear walls.
Claim 3
Dependent Claim
19 words
The snow thrower of claim 1, wherein said front wall portion is disposed above the front of said impeller.
Claim 4
Dependent Claim
27 words
The snow thrower of claim 1, wherein the lower edge of said front wall portion is approximately at the same height as the top of said impeller.
Claim 5
Dependent Claim
28 words
The snow thrower of claim 1 wherein the lower edge of said front wall portion is a substantial distance forwardly of the lower front edges of said vanes.
Claim 6
Dependent Claim
60 words
The snow thrower of claim 1 wherein said rear wall portion extends upwardly and forwardly at a predetermined angle to a transverse vertical plane and wherein the front and rear edges of said vanes slope at the same angle, said front edges of said vanes diverging from said front wall portion in a downward direction from their pivot connection therewith.
Claim 7
Dependent Claim
24 words
The snow thrower of claim 5 wherein said angle is at least 30 degrees when said snow thrower is in its normal operating position.
Claim 8
Dependent Claim
23 words
The snow thrower of claim 1 wherein the upper ends of said vanes are substantially coterminous with the upper end of said chute.
Claim 9
Dependent Claim
18 words
The snow thrower of claim 1 wherein said front wall portion is releasably secured to said sidewall portions.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |