US4237629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for actuating the operation of a snowplow
Assignee: Ing Alfred Schmidt GmbH
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Filing: 1978-08-04
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Granted: 1980-12-09
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Expires: 1998-08-04
Abstract
Abstract A snow plow having a blade movable by a plurality of drive devices actuated by switch members is controllable by a stick shift having a hand grip at one end and contacts at the other end for engagement with the switch members. The stick shift is pivotal from a neutral position in a selected one of a plurality of paths into engagement with the switch members, and includes in combination with its hand grip two additional switches for controlling at least one additional operation of said blade independently of the position of the stick shift.
Inventors
- 👤 Alfred Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:59
CPC Classifications
G; G05; G05G; G05G9/00; G05G9/02; G05G9/04; G05G9/047; E; E01; E01H; E01H5/00; E01H5/04; E01H5/06; E01H5/065; E01H5/066; E02; E02F; E02F9/00; E02F9/20; E02F9/2004; G05G2009/04703; G05G2009/04707; G05G2009/0474; G05G2009/04744; G05G2009/04774
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
131 words
Apparatus for controlling the operation of a snow plow having a blade movable by drive means actuated by switch members, comprising a stick shift having a hand grip at one end and means at the other end for engagement with said switch members, said stick shift being pivotal from a neutral position in a selected one of a plurality of paths into engagement with the switch members, said switch members being connected to said drive means for respectively "raising", "lowering", "adjusting to the right", and "adjusting to the left" said blade and including two additional switch means in combination with said hand grip for controlling at least one additional operation for "plowing under dead weight" and "unlock in adjusting direction" of said blade independently of the position of the stick shift.
Claim 2
Dependent Claim
131 words
Apparatus for controlling the operation of a snow plow having a blade movable by drive means actuated by switch members, comprising a stick shift having a hand grip at one end and means at the other end for engagement with said switch members, said stick shift being pivotal from a neutral position in a selected one of a plurality of paths into engagement with the switch members, said switch members being connected to said drive means for respectively "raising", "lowering", "adjusting to the right", and "adjusting to the left" said blade and including two additional switch means in combination with said hand grip for controlling at least one additional operation for "plowing under dead weight" and "unlock in adjusting direction" of said blade independently of the position of the stick shift.
Claim 3
Dependent Claim
35 words
The apparatus for controlling the operation of a snow plow according to claim 1, wherein said switch members have normally open contacts and remain connected so long as said stick shift is in engagement therewith.
Claim 4
Dependent Claim
40 words
The apparatus for controlling the operation of a snow plow according to claim 2, including spring means for normally biasing said stick shift in neutral position and causing automatic return to said neutral position on release of said stick shift.
Claim 5
Dependent Claim
21 words
The apparatus according to claim 1, wherein said hand grip switch means is a push button mounted on said hand grip.
Claim 6
Dependent Claim
26 words
The apparatus according to claim 4, wherein the push button is a thumb knob mounted on the top end of the hand grip, for thumb operation.
Claim 7
Dependent Claim
26 words
The apparatus according to claim 4, wherein the push button has a normally open contact and remains connected as long as the actuating force acts thereon.
Claim 8
Dependent Claim
32 words
The apparatus according to claim 6, including spring means for normally biasing in open position said push button and causing automatic return to open contact position on release of said push button.
Claim 9
Dependent Claim
35 words
The apparatus according to claim 1 or 4, wherein said hand grip is displaceable axially along said stick shift and said hand grip switch means includes cooperable contacts actuatable by displacement of the hand grip.
Claim 10
Dependent Claim
31 words
The apparatus according to claim 8, wherein said hand grip is movable between a first position in which said contacts are disengaged and a second position wherein said contacts are engaged.
Claim 11
Dependent Claim
33 words
The apparatus according to claim 9, including spring means for normally biasing said hand grip in said first position and for automatically returning said hand grip to said first position on release thereof.
Claim 12
Dependent Claim
22 words
The apparatus according to claim 1, including means for effecting the operation of "adjust" (AR, AL) simultaneously with the operation "plow" (P).
Claim 13
Dependent Claim
25 words
The apparatus according to claim 1, including means for automatically annulling the operation "plow" (P) upon actuation of the operations "raise" (R) or "lower" (L).
Claim 14
Dependent Claim
27 words
The apparatus according to claim 1, including means for controlling the operation of "unlock in adjust direction" (U) simultaneously with the operations "raise" (R) and "lower" (L).
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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) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |