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US 5,785,362 AGranted
Cam-operated hatch cover lock
AssigneeIreco, Inc.
InventorRudolph E. Nadherny
Life of this patent
Estimating the term…
Abstract
A hatch cover locking mechanism for securing a roof member onto a hatch opening of a railway hopper car is provided. The hatch cover lock utilizes camming engagement between an operation handle and a keeper member in order to lock or unlock the keeper member over a hinge pin associated with the hatch roof member. A hook rotates along an orientation generally the same as that of the keeper, and the hook retains the hinge pin as desired when the hinge pin is not locked down by the keeper.
Claims25
A cam-operated hatch cover lock for securing an openable roof member of a railway hopper car, the hatch cover lock comprising:
- a housing member, said housing member being adapted to secure the hatch cover lock to a railway hopper car at a location therealong for engaging and receiving a hopper cover narrow member of an openable roof member;
- a receptor location associated with said housing member, said receptor location being adapted to receive the narrow member;
- a retainer hook member adapted to automatically provide access of the narrow member to said receptor location and to automatically retain the narrow member within said receptor location;
- a handle member pivotally mounted to the housing member, said handle member having a pivot axis and a camming surface;
- and
- a keeper member, a cam follower surface of the keeper member, said keeper member being adapted to lock the narrow member within said receptor location upon camming engagement of its said cam follower surface by said camming surface of the handle member, said keeper member having a locking surface adapted to engage and lock down the narrow member when the hatch cover lock is in a locked orientation, said keeper member being pivotable about an axis generally perpendicular to said pivot axis of the handle member, and said locking surface faces away from said handle member.
3 more elements
A cam-operated hatch cover lock for securing a removable roof member for a top hatch of a railway hopper car, the hatch cover lock comprising:
- a housing member, said housing member being adaptable to secure the hatch cover lock to a railway hopper car at a location therealong for engaging and receiving a hatch cover narrow member of a removable roof member;
- a notch within said housing member, said notch at least partially defining a receptor area which is sized and shaped to receive the narrow member;
- a retaining hook member pivotally mounted with respect to said housing member along an axis generally parallel to the narrow member, said retaining hook member having a closed orientation for retaining the narrow member within the receptor area, said hook member having an open orientation at which the narrow member is free of interference from said retaining hook member to pass into or out of said receptor area;
- a handle member pivotally mounted to the housing along an axis generally perpendicular to the narrow member, said handle member having a curved camming surface;
- and
- a keeper member pivotally mounted to said housing member along an axis generally parallel to the narrow member, said keeper member having a locking surface adapted to secure the narrow member within the receptor area when said keeper member is in a closed orientation, said keeper member adapted to permit the narrow member to be free from interference from said keeper member for passage in and out of said receptor area when said keeper member is in an open orientation, said keeper member having a cam follower surface which is engaged by said curved camming surface of the handle member to thereby effect camming engagement and movement of said keeper member between its said open position and its said closed position during pivoting movement of said handle member.
3 more elements
A cam-operated hatch cover lock for securing an openable roof member of a railway hopper car, the hatch cover lock comprising:
- a housing member, said housing member being adapted to secure the hatch cover lock to a railway hopper car at a location therealong for engaging and receiving a hopper cover narrow member of an openable roof member;
- a receptor location associated with said housing member, said receptor location being adapted to receive the narrow member;
- a retainer hook member adapted to automatically provide access of the narrow member to said receptor location and to automatically retain the narrow member within said receptor location, said retainer hook member being pivotally mounted to said housing member along an axis generally parallel to the narrow member, said retainer hook member having a hook projection directed toward the openable roof member, and said retainer hook member pivots in a direction away from the openable roof member when moving from its position to retain the narrow member into a position to permit passage of the narrow member into and out of said receptor location;
- a handle member pivotally mounted to the housing member, said handle member having a camming surface;
- and
- a keeper member, a cam follower surface of the keeper member, said keeper member being adapted to lock the narrow member within said receptor location upon camming engagement of its said cam follower surface by said camming surface of the handle member.
3 more elements
A cam-operated hatch cover lock for securing an openable roof member of a railway hopper car, the hatch cover lock comprising:
- a housing member, said housing member being adapted to secure the hatch cover lock to a railway hopper car at a location therealong for engaging and receiving a hopper cover narrow member of an openable roof member;
- a receptor location associated with said housing member, said receptor location being adapted to receive the narrow member;
- a retainer hook member adapted to automatically provide access of the narrow member to said receptor location and to automatically retain the narrow member within said receptor location;
- a spring biasing said retainer hook member to a closed orientation in a direction toward the openable roof member;
- a handle member pivotally mounted to the housing member, said handle member having a camming surface;
- and
- a keeper member, a cam follower surface of the keeper member, said keeper member being adapted to lock the narrow member within said receptor location upon camming engagement of its said cam follower surface by said camming surface of the handle member.
4 more elements
Dependencies are inferred from the claim text.