US3765058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hook for opening boxcar doors
Assignee: Individual
•
Filing: 1972-08-16
•
Granted: 1973-10-16
•
Expires: 1992-08-16
Abstract
Abstract A hook designed for engagement with a side edge of a boxcar door to provide means establishing a pulling connection for the door. The hook includes a body member reversely turned at one end for engaging the edge of the door. The other end of the body member has an outturned tongue portion having a slot extending partially into the body member. The slot is arranged to receive a chain for connection to a pulling member such as a lift truck for opening and closing the boxcar door.
Inventors
- 👤 P Scdoris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:39
CPC Classifications
F; F16; F16B; F16B45/00; F16B45/005; Y; Y10; Y10T; Y10T24/00; Y10T24/34; Y10T24/3484; Y10T24/39; Y10T24/3902
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
176 words
A hook for opening boxcar doors comprising a. a body, b. a hook portion on one end of said body arranged for engagement with an edge of a boxcar door, c. a curved portion on the other end of said body extending outwardly in a direction opposite from the hook portion, d. means defining a slot extending longitudinally through a portion of said outwardly curved portion and into said body portion, e. and a pull line arranged for removable attachment in said slot from either side of said body, f. said pull line, when attached in said slot from one side of said body and when a pulling force is exerted thereto in a direction to open the boxcar door, being arranged to cause the hook portion to apply a twisting leverage in one direction to the edge of the door and when attached in said slot from the other side of said body being arranged to cause said hook portion to apply a twisting leverage in the other direction to the edge of the door.
Claim 2
Dependent Claim
176 words
A hook for opening boxcar doors comprising a. a body, b. a hook portion on one end of said body arranged for engagement with an edge of a boxcar door, c. a curved portion on the other end of said body extending outwardly in a direction opposite from the hook portion, d. means defining a slot extending longitudinally through a portion of said outwardly curved portion and into said body portion, e. and a pull line arranged for removable attachment in said slot from either side of said body, f. said pull line, when attached in said slot from one side of said body and when a pulling force is exerted thereto in a direction to open the boxcar door, being arranged to cause the hook portion to apply a twisting leverage in one direction to the edge of the door and when attached in said slot from the other side of said body being arranged to cause said hook portion to apply a twisting leverage in the other direction to the edge of the door.
Claim 3
Dependent Claim
45 words
The hook of claim 1 wherein said hook portion has a right angle projection therein making the inner area of said hook portion correspond to the contour of a boxcar door edge, and a reinforcing rib extending exteriorly over said hook for reinforcing the latter.
Claim 4
Dependent Claim
54 words
The hook of claim 1 including an elastic connecting line having one end connected to the curved end portion of said hook, and means on the other end of said elastic connecting line arranged to connect the line to a projection on the boxcar door for holding the hook in place on the door.
References Cited (Backward Citations)
US1025964A
Cited
US2354746A
Cited
US2660349A
Cited
US3343503A
Cited
US3338186A
Cited
US3494658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-15 | 1977-04-16 | 1977-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-15 | 1981-04-16 | 1981-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-15 | 1985-04-16 | 1985-10-16 | $7700.00 | Window Closed / Lapsed |