Hydraulic tensioner with a molded valve base and cap

Details Hydraulic tensioner with a molded valve base and cap Hydraulic tensioner with a molded valve base and cap

1993-02-04

1994-01-11

Bui, Thuy M.

Endless belt power transmission systems or components

Means for adjusting belt tension or for shifting belt,...

Tension adjuster or shifter driven by electrical or fluid motor

474117, F16H 708

Patent

active

052776646

ABSTRACT:
A hydraulic tensioner having a plunger slidably fitted in a mounting cavity n a housing and biased in a protruding direction by a spring and fluid. A variable orifice check valve permits fluid to only flow into, and thereby protrude the plunger, but not out of the mounting cavity is disclosed. The variable orifice check valve is accomplished with a cylindrical compression spring in which the spring coils are normally mutually contacting and which has a top spring cap molded directly to an end of the spring and a bottom spring retainer molded directly to the opposite end of the spring. Such a construction reliably secures the top spring cap and bottom spring retainer to the spring. A mechanical no-return capability is provided to the plunger through an internal ratchet positioned within the mounting cavity and constructed from a cylinder having two helical openings which the plunger engages when the plunger experiences sufficient force to be pushed inwardly.

REFERENCES:
patent: 3964331 (1976-06-01), Oldfield
patent: 4790796 (1988-12-01), Okabe et al.
patent: 4940447 (1990-07-01), Kawashima et al.
patent: 4950209 (1990-08-01), Kawashima et al.
patent: 5116284 (1992-05-01), Cho
patent: 5181889 (1993-01-01), Maruyama et al.

Affiliated with

Also associated with

Rating

Hydraulic tensioner with a molded valve base and cap does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hydraulic tensioner with a molded valve base and cap, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic tensioner with a molded valve base and cap will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1627989