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US 5,842,943 AGranted
Hydraulic tensioner having an oil reservoir sponge member
AssigneeBorg-Warner Automotive, Inc.
InventorNaosumi Tada
Life of this patent
Estimating the term…
Abstract
A hydraulic tensioner having an oil reservoir sponge member present in the bore of the housing is provided. When the sponge member is compressed, the oil retained or absorbed by the sponge member discharges from the sponge member and enters the oil passage of the piston.
Claims8
A hydraulic tensioner comprising:
- a housing having a bore;
- said bore having a bottom face;
- a piston slidably received in said bore, said piston and said bore forming a fluid chamber therebetween;
- said piston having a rear end face and an oil passage connected to the fluid chamber;
- a spring biasing said piston in a protruding direction from said bore;
- a passage in said housing to connect the fluid chamber with a source of fluid;
- and
- a sponge member in said bore, said sponge member contacting said bottom face of said bore.
5 more elements
A hydraulic tensioner comprising:
- a housing having a bore;
- said bore having a bottom face;
- a piston slidably received in said bore, said piston and said bore forming a fluid chamber therebetween;
- said piston having a rear end face and an oil passage connected to the fluid chamber;
- a spring biasing said piston in a protruding direction from said bore;
- a passage in said housing to connect the fluid chamber with a source of fluid;
- and
- a sponge member in said bore, wherein said sponge member retains oil, wherein retraction of said piston causes said sponge member to discharge oil into said oil passage of said piston.
5 more elements
Dependencies are inferred from the claim text.