Patent US4275514A successfully refreshed from Google Patents.
US4275514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Snowplow extensions
Assignee: Individual
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Filing: 1980-01-28
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Granted: 1981-06-30
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Expires: 2000-01-28
Abstract
Abstract An attachment for snowplows comprising two sheets of steel, fiberglass, or plastic type material that are curved in contour with the snowplow moldboard and attached thereto in such a manner as to make the snowplow adjustable to various widths.
Inventors
- 👤 Nicholas J. Maura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:47
CPC Classifications
E; E01; E01H; E01H5/00; E01H5/04; E01H5/06; E01H5/065
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
152 words
A snowplow and snowplow extensions combination comprising: spring-loaded curved moldboard having a bottom edge and a top edge and a replacement cutter located along said bottom edge with a molded in track extending along the length of said replacement cutter, a guiding track attached to said top edge and having spaced adjustment holes; a pair of extension wings having a top guide slidable engaging said guiding track, a bottom guide slidable engaging said molded in track, said extension wings being curved in contour with said curved moldboard; said top guide having a handle attached for ease in sliding and upright plow guides mounted to the outside corners of said top guide, said top guide having spaced adjustment holes therein, a manual operable position adjustment holding pin for extending through said adjustment holes of said guiding track and top guide when aligned to thereby manually fasten and hold said extension wings in position.
Claim 2
Dependent Claim
152 words
A snowplow and snowplow extensions combination comprising: spring-loaded curved moldboard having a bottom edge and a top edge and a replacement cutter located along said bottom edge with a molded in track extending along the length of said replacement cutter, a guiding track attached to said top edge and having spaced adjustment holes; a pair of extension wings having a top guide slidable engaging said guiding track, a bottom guide slidable engaging said molded in track, said extension wings being curved in contour with said curved moldboard; said top guide having a handle attached for ease in sliding and upright plow guides mounted to the outside corners of said top guide, said top guide having spaced adjustment holes therein, a manual operable position adjustment holding pin for extending through said adjustment holes of said guiding track and top guide when aligned to thereby manually fasten and hold said extension wings in position.
Claim 3
Dependent Claim
89 words
The combination recited in claim 1 further comprising side plate holders mounted to outer extension wing sides and receiving a pair of side plates at right angles to said wing sides for holding snow, said side plates having bars extending therefrom for being received by said side plate holders and being held in place by pins extending through said side plate holders and said bars; said side plates having one edge curved in contour with and abutting said extension wings and having another edge rounded on the bottom portion.
Claim 4
Dependent Claim
87 words
The combustion recited in claim 1 further comprising a hydraulic power system for sliding said extension wings including double acting hydraulic cylinders mounted to the backside of said snowplow moldboard and having piston rods mounted to said extension wings via mounting brackets attached to said wings, and hydraulic cylinders being operated by a two way control valve connected to said hydraulic cylinders via fluid lines, said valve being adapted to be in fluid communication with an existing vehicle pump to provide power for said double acting cylinders.
References Cited (Backward Citations)
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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) | 1984-06-29 | 1984-12-29 | 1985-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-29 | 1988-12-29 | 1989-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-29 | 1992-12-29 | 1993-06-30 | $7700.00 | Window Closed / Lapsed |