Air vent for hydraulic chain tensioner
AssigneeBorg-Warner Automotive, Inc.
InventorsFrancis J. Hunter, Mark M. Wigsten, Sam A. Kuznets
Life of this patent
Estimating the term…
Abstract
A hydraulic chain tensioner has an air vent. The tensioner includes a housing having a fluid filled chamber and a hollow plunger slidably received within the chamber and biased in a protruding direction by a spring. The plunger has an upper end with an aperture. The vent includes a disk biased by the spring against the inside of the upper end of the plunger. With the disk having at least one channel formed on at least one side of the disk. The channel has a first end at the periphery of the disk and a second end at a position to establish a connection between the atmosphere and the chamber through the aperture in the upper end of the plunger.
Claims20
A hydraulic chain tensioner comprising:
- a. a housing having a fluid filled chamber;
- b. a hollow plunger slidably received within the fluid chamber and having an upper end, the upper end having an aperture;
- c. a spring biasing the plunger in a protruding direction;
- and,
- d. a vent including a disk having a first surface, a second surface, and a periphery and at least one channel formed on at least one surface of the disk, the channel having a first end terminating at the periphery of the disk and a second end terminating in a position to establish a connection between the atmosphere and the chamber through the aperture.
A hydraulic chain tensioner comprising:
- a. a housing having a fluid filled chamber, a passage in the housing to connect the chamber with a source of fluid pressure, and a check valve provided between the chamber and the source of fluid pressure to permit fluid flow into the chamber while blocking flow in the reverse direction;
- b. a hollow plunger slidably received within the fluid chamber and having an upper end, the upper end having an aperture;
- c. a spring biasing the plunger in a protruding direction;
- and,
- d. a vent including a disk having a first surface, a second surface, and a periphery and at least one channel formed on at least one surface of the disk, the disk being biased by the spring against the inside of the upper end of the plunger, the channel having a first end terminating at the periphery of the disk and a second end terminating in a position to establish a connection between the atmosphere and the chamber through the aperture.
A hydraulic chain tensioner comprising:
- a. a housing having a fluid filled chamber, a passage in the housing to connect the chamber with a source of fluid pressure, and a check valve provided between the chamber and the source of fluid pressure to permit fluid flow into the chamber while blocking flow in the reverse direction;
- b. a hollow plunger slidably received within the fluid chamber and having an upper end, the upper end having an aperture;
- c. a spring biasing the plunger in a protruding direction;
- d. a vent including a disk having a first surface, a second surface, and a periphery and at least one channel formed on at least one surface of the disk, the disk being biased by the spring against the inside of the upper end of the plunger, the channel having a first end terminating at the periphery of the disk and a second end terminating in a position to establish a connection between the atmosphere and the chamber through the aperture;
- e. a movable rack associated with the plunger;
- and,
- f. a ratchet biased by a spring in meshing engagement with the rack.
Dependencies are inferred from the claim text.