Check seal structure for hydraulic shock absorber

Details Check seal structure for hydraulic shock absorber Check seal structure for hydraulic shock absorber

2008-10-21

2011-12-20

Pickard, Alison (Department: 3674)

Seal for a joint or juncture

Seal between relatively movable parts

Circumferential contact seal for other than piston

C277S457000, C277S353000, C277S928000, C188S322170

Reexamination Certificate

active

08079598

ABSTRACT:
A check seal (53) for discharging working oil scraped off a piston rod (3) by an oil lip (52b) into an oil pool (A) of a hydraulic shock absorber to an oil reservoir (R) is disposed on the outside of the oil pool (A). The check seal (53) comprises an annular seat surface (4d) and an annular lip (53a) seated resiliently on the seat surface (4d). The annular seat surface (4d) comprises an annular main rib (11) and an annular inner rib (12), both of which project toward the annular lip (53a), such that an annular groove (21) is formed between the main rib (11) and the inner rib (12). By providing a pressure introducing passage (12a) to introduce a pressure inside the inner rib (12) to the annular groove (21), the check seal (53) exhibits a high working oil discharging performance and a high working oil sealing performance.

REFERENCES:
patent: 2754136 (1956-07-01), Phillips
patent: 2851289 (1958-09-01), Pedersen
patent: 3685838 (1972-08-01), Malmstrom
patent: 4185721 (1980-01-01), Karklins et al.
patent: 4344631 (1982-08-01), Winn
patent: 4527673 (1985-07-01), Szcupak
patent: 4678064 (1987-07-01), Adachi et al.
patent: 4995623 (1991-02-01), Wada et al.
patent: 5167419 (1992-12-01), Robertson
patent: 6029980 (2000-02-01), Downes
patent: 6457870 (2002-10-01), Aizawa et al.
patent: 6622832 (2003-09-01), Ashiba et al.
patent: 6644446 (2003-11-01), Kachi et al.
patent: 7793584 (2010-09-01), Murakami et al.
patent: 2002/0063024 (2002-05-01), Ashiba et al.
patent: 2006/0145426 (2006-07-01), Schroeder et al.
patent: 2009/0151799 (2009-06-01), Ozawa
patent: 09-317914 (1997-12-01), None
patent: 11-108101 (1999-04-01), None

Affiliated with

Also associated with

Rating

Check seal structure for hydraulic shock absorber does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Check seal structure for hydraulic shock absorber, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Check seal structure for hydraulic shock absorber will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4265046