Patent US3746368A successfully refreshed from Google Patents.
US3746368A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicular carried plow coupling
Assignee: Gledhill Road Machinery Co
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Filing: 1971-12-22
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Granted: 1973-07-17
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Expires: 1991-12-22
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
- 👤 W Gledhill
- 👤 P Sherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:44
CPC Classifications
B; B62; B62D; B62D49/00; B62D49/04; E; E01; E01H; E01H5/00; E01H5/04; E01H5/06; E02; E02F; E02F3/00; E02F3/04; E02F3/627; E02F3/96; E02F3/968
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
148 words
A coupling including a housing assembly adapted to be mounted on a vehicle and a loop and frame member adapted to be mounted on a road grading blade, the housing having a force receiving surface on its forward face, said surface being convex and having a substantially horizontal axis, a recess in said surface defined by rearwardly converging walls, a latching hook means positioned in said recess and adapted to pivot about an axis between open and closed position, said hook axis being substantially parallel with said horizontal axis, means for locking said hook member in its closed position, said loop and frame member being coupled with said housing by said loop extending into said recess and being held in place by said latching hook means, the force receiving surface of said housing being juxtaposed to the said frame member for transmitting force from one to the other.
Claim 2
Dependent Claim
148 words
A coupling including a housing assembly adapted to be mounted on a vehicle and a loop and frame member adapted to be mounted on a road grading blade, the housing having a force receiving surface on its forward face, said surface being convex and having a substantially horizontal axis, a recess in said surface defined by rearwardly converging walls, a latching hook means positioned in said recess and adapted to pivot about an axis between open and closed position, said hook axis being substantially parallel with said horizontal axis, means for locking said hook member in its closed position, said loop and frame member being coupled with said housing by said loop extending into said recess and being held in place by said latching hook means, the force receiving surface of said housing being juxtaposed to the said frame member for transmitting force from one to the other.
Claim 3
Dependent Claim
58 words
The coupling of claim 1 including a rearwardly converging mouth within said recess defined by a sloped surface on the forward face of said hook means and a plate extending upwardly from the bottom of the recess, the relief between the plate and the bottom of the recess having its minimum at the forwardmost portion of the plate.
Claim 4
Dependent Claim
24 words
The coupling of claim 1 wherein the hook means includes a second recess having a profile closely approximating the upper surface of the loop.
Claim 5
Dependent Claim
102 words
The coupling of claim 3 wherein the forwardmost surface of the hook recess is curved away from the loop to each side of the center of said forwardmost surface. the rearmost surface of the hook recess tapering away from the loop to each side of the center of said rearmost surface, the taper providing less clearance with the loop at its maximum rearmost surface hook recess clearance than the curved surface at its maximum forwardmost surface hook recess clearance,, the surface of the hook recess between the forwardmost and rearmost surfaces defining a smooth surface merging from one shape to the other.
Claim 6
Dependent Claim
30 words
The coupling of claim 1 including a protuberance on the outer surface of the hook portion, the locking means comprising a pivotable block means movable into position above said protuberance.
Claim 7
Dependent Claim
30 words
The coupling of claim 5 including a camming surface on said hook means, said camming surface being engageable by said block means to cam the hook means to open position.
Claim 8
Dependent Claim
29 words
The coupling of claim 1 including a camming surface on said hook means, pivotable block means for engaging said camming surface and moving said hook means to open position.
Claim 9
Dependent Claim
24 words
The coupling of claim 7 wherein the hook means includes a second recess having a profile closely approximating the upper surface of the loop.
Claim 10
Dependent Claim
96 words
The coupling of claim 8 wherein the forwardmost surface of the hook recess is curved away from the loop to each side of the center of said forwardmost surface, the rearmost surface of the hook recess tapering away from the Loop to each side of the center of said rearmost surface, the taper providing less clearance with the loop at its maximum than the curved surface at its maximum forwardmost surface hook recess, the surface of the hook recess between the forwardmost and rearmost surfaces defining a smooth surface merging from one shape to the other.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |