US3775877A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Backplowing snowplow attachment
Assignee: Individual
•
Filing: 1972-09-28
•
Granted: 1973-12-04
•
Expires: 1992-09-28
Abstract
Abstract A conventional snowplow attachment for the front of a small vehicle is provided with controllable means for overcoming the springs of the attachment''s conventional safety-release mechanism, which permits at least the lower edge portion of the blade to pivot to the rear when it encounters an obstacle, to retain the blade''s lower edge portion in such rearwardly and downwardly-inclined position for backplowing purposes.
Inventors
- 👤 E Gove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:53
CPC Classifications
E; E01; E01H; E01H5/00; E01H5/04; E01H5/06; E01H5/063; E01H5/061
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
137 words
A snowplow attachment for a vehicle comprising: a blade supporting frame mountable to a vehicle at its rearward end for vertical swinging movement; laterally elongated plowing blade means carried by the forward end of said frame and having at least a lower scraping edge portion movable between a downwardly and forwardly-inclined position for forward plowing without snow-overriding upward movemEnt of said blade and a downwardly and rearwardly-inclined position for obstacle-overriding upward movement of said blade; means operatively associated with said blade means for urging said edge portion into said plowing position, said urging means being yieldable when said edge portion encounters an obstacle; and controllable means carried by said attachment and operatively associated with said blade means for selectively moving said edge portion into said rearwardly-inclined position to enable backplowing without snow-overriding upward movement of said blade.
Claim 2
Dependent Claim
137 words
A snowplow attachment for a vehicle comprising: a blade supporting frame mountable to a vehicle at its rearward end for vertical swinging movement; laterally elongated plowing blade means carried by the forward end of said frame and having at least a lower scraping edge portion movable between a downwardly and forwardly-inclined position for forward plowing without snow-overriding upward movemEnt of said blade and a downwardly and rearwardly-inclined position for obstacle-overriding upward movement of said blade; means operatively associated with said blade means for urging said edge portion into said plowing position, said urging means being yieldable when said edge portion encounters an obstacle; and controllable means carried by said attachment and operatively associated with said blade means for selectively moving said edge portion into said rearwardly-inclined position to enable backplowing without snow-overriding upward movement of said blade.
Claim 3
Dependent Claim
16 words
The structure defined in claim 1 in which the controllable means includes a linear hydraulic motor.
Claim 4
Dependent Claim
40 words
The structure defined in claim 1 in which the entire blade means is movable as a unit for movement of the lower edge portion thereof and the controllable means is mounted to the frame and connected to said blade means.
Claim 5
Dependent Claim
31 words
The structure defined in claim 3 in which the controllable means includes a linear hydraulic motor having a cylinder and piston and flexible means connecting said piston to the blade means.
Claim 6
Dependent Claim
40 words
The structure defined in claim 1 in which the blade means includes an upper main portion movably carrying the lower edge portion and the controllable means is mounted to said upper main portion and connected to said lower edge portion.
Claim 7
Dependent Claim
27 words
The structure defined in claim 5 in which the controllable means includes a linear hydraulic motor and flexible means connecting said motor to the lower edge portion.
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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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |