Patent US4073077A successfully refreshed from Google Patents.
US4073077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Snowplow blade extension
Assignee: Individual
•
Filing: 1977-01-03
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Granted: 1978-02-14
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Expires: 1997-01-03
Abstract
Abstract Snowplow blades can be immediately varied in length at one or both ends by providing extensions of the same shape as the blade, which extensions carry studs which are received in sockets, preferably lengthwise of the back of the blade. The studs are pinned in the sockets for quick and easy fastening and removal.
Inventors
- 👤 Albert E. Essel, deceased
- 👤 executrix by Virginia G. Essel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:30
CPC Classifications
E; E01; E01H; E01H5/00; E01H5/04; E01H5/06; E01H5/065
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
88 words
The combination of a snowplow blade on a motorized vehicle, with a tubular socket which extends longitudinally of the blade on its back surface and which is an immovable part of the blade structure, and with a removable extension of a shape corresponding to that of the blade and from which projects a longitudinal stud fitting the socket for removably holding the extension in a working position beyond an end of the blade, and a locking device for preventing unintended motion of the stud out of the socket.
Claim 2
Dependent Claim
88 words
The combination of a snowplow blade on a motorized vehicle, with a tubular socket which extends longitudinally of the blade on its back surface and which is an immovable part of the blade structure, and with a removable extension of a shape corresponding to that of the blade and from which projects a longitudinal stud fitting the socket for removably holding the extension in a working position beyond an end of the blade, and a locking device for preventing unintended motion of the stud out of the socket.
Claim 3
Dependent Claim
14 words
The combination of claim 1, with an extension for each end of the blade.
Claim 4
Dependent Claim
27 words
The combination of claim 1, in which the socket has an opening extending completely through and the stud is long enough to extend completely through the opening.
Claim 5
Dependent Claim
32 words
The combination of claim 3, in which the locking device is a pin, and in which the stud has a transverse hole to receive the pin for latching the stud against removal.
Claim 6
Dependent Claim
16 words
The combination of claim 4 in which a spring clip holds the pin against accidental displacement.
Claim 7
Dependent Claim
17 words
The combination of claim 5, in which there are two parallel sockets and studs for each extension.
Claim 8
Dependent Claim
20 words
The combination of claim 6 including a hammer pad on the extension for receiving blows for loosening a stuck extension.
Claim 9
Dependent Claim
14 words
The combination of claim 6, with an extension for each end of the blade.
Claim 10
Dependent Claim
14 words
The combination of claim 7, with an extension for each end of the blade.
Claim 11
Dependent Claim
17 words
The combination of claim 5 in which the pin and clip are chained to the snowplow blade.
References Cited (Backward Citations)
CA796483A
Cited
US2746181A
Cited
US2840932A
Cited
US3034237A
Cited
US3039209A
Cited
AT261668B
Cited
US3803733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |