US3952431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicular carried plow coupling
Assignee: Gledhill Road Machinery Co
•
Filing: 1975-05-29
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Granted: 1976-04-27
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Expires: 1995-05-29
Abstract
Abstract A coupling between a snow plow and the front of a truck including a housing assembly adapted to be mounted on the truck and a loop and frame member adapted to be mounted on the snow plow. The housing has a convex front surface and a recess in said surface defined by rearwardly converging walls. A hook means is mounted in said recess and is adapted to pivot about an axis between open and closed positions. Means are provided for locking the hook member in its closed position. A frame member is adapted to abut the convex surface on the forward face of the housing member and the loop projects rearwardly from the frame member into the recess where it is held in place by the hook means.
Inventors
- 👤 William Gledhill
- 👤 Philip Leland Sherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:19
CPC Classifications
E; E01; E01H; E01H5/00; E01H5/04; E01H5/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
86 words
The combination of a snow plow and a truck, the truck including a female coupling member attached to its front, the snow plow including a male coupling member carried on its rear, means on said truck for raising and lowering the blade of the snow plow, means on the plow to facilitate limited universal angular movement thereof, the improvement comprising: said female coupling member comprising a housing having a convex, forward force receiving surface having a substantially horizontal axis, said surface including a recess area therein;
Claim 2
Dependent Claim
86 words
The combination of a snow plow and a truck, the truck including a female coupling member attached to its front, the snow plow including a male coupling member carried on its rear, means on said truck for raising and lowering the blade of the snow plow, means on the plow to facilitate limited universal angular movement thereof, the improvement comprising: said female coupling member comprising a housing having a convex, forward force receiving surface having a substantially horizontal axis, said surface including a recess area therein;
Claim 3
Dependent Claim
137 words
latching hook means mounted within said recess area for pivotal movement about a substantially horizontal axis between opened and closed positions, said latching hook means including a latching surface; said male coupling member comprising a rigid, generally planar frame having a loop protruding outwardly thereof extending into and retained in said recess area by latching engagement with said latching surface of said latching hook means, said force receiving surface of said female coupling member and said frame of said male coupling member being juxtaposed for transmitting force from one to the other, said latching surface and the cooperating engaging surface of said loop each being such to facilitate relative movement therebetween for permitting, raising, lowering, and tilting of said snow plow between different desired positions while said male coupling member is engaged with said female coupling member.
Claim 4
Dependent Claim
137 words
latching hook means mounted within said recess area for pivotal movement about a substantially horizontal axis between opened and closed positions, said latching hook means including a latching surface; said male coupling member comprising a rigid, generally planar frame having a loop protruding outwardly thereof extending into and retained in said recess area by latching engagement with said latching surface of said latching hook means, said force receiving surface of said female coupling member and said frame of said male coupling member being juxtaposed for transmitting force from one to the other, said latching surface and the cooperating engaging surface of said loop each being such to facilitate relative movement therebetween for permitting, raising, lowering, and tilting of said snow plow between different desired positions while said male coupling member is engaged with said female coupling member.
Claim 5
Dependent Claim
25 words
The improvement as defined in claim 1 wherein the vertical thickness of said loop is substantially less than the vertical depth of said recess area.
Claim 6
Dependent Claim
39 words
The improvement as defined in claim 1 wherein said loop is of generally circular cross-section and wherein said latching surface of said latching hook means is arcuately contoured to closely engage a portion of the circumference of said loop.
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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) | 1979-04-27 | 1979-10-27 | 1980-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-27 | 1983-10-27 | 1984-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-27 | 1987-10-27 | 1988-04-27 | $7700.00 | Window Closed / Lapsed |