Pinless tappet in a common rail high pressure fuel pump
AssigneeCummins Inc.
InventorAnthony A. Shaull
Life of this patent
Estimating the term…
Abstract
A system for preventing rotation of a tappet includes a tappet having an outer casing and a central axis which is configured to reciprocate linearly along the central axis. The outer casing includes a flat portion having a length along the central axis and having a width. Additionally, the system includes a lock bar fixed in position relative to the linear oscillation of the outer casing. The lock bar is positioned in proximity to the flat portion of the outer casing. Upon rotation of the outer casing about the central axis, the lock bar is configured to come into contact with the cuter casing and inhibit additional rotation of the outer casing.
Claims20
A system for preventing rotation of a tappet, comprising:
- a tappet, having an outer casing and a central axis, being configured to reciprocate linearly along the central axis,
- the outer casing comprising a flat portion having a length parallel to the central axis and having a width;
- and
- a lock bar fixed in position relative to the linear oscillation of the outer casing, the lock bar positioned in proximity to the flat portion of the outer casing, and upon rotation of the outer casing about the central axis, the lock bar being configured to come into contact with the outer casing and inhibit additional rotation of the outer casing.
A fuel pump, comprising:
- at least one cylindrical bore;
- a tappet positioned within the at least one cylindrical bore and having an outer casing and a central axis, the tappet configured to reciprocate linearly along the central axis,
- wherein at least a portion of the outer casing is configured to reciprocate linearly within the at least one cylindrical bore;
- a rotatable cam, the rotatable cam being in contact with the tappet to facilitate the linear oscillation of the outer casing;
- the outer casing including a flat portion having a length along the central axis and having a width;
- and
- a lock bar fixed in position relative to the outer casing, the lock bar being positioned in proximity to the flat portion of the outer casing, and upon rotation of the outer casing about the central axis, the lock bar being configured to come into contact with the outer casing and inhibit additional rotation of the outer casing.
Dependencies are inferred from the claim text.