Brakes – Internal-resistance motion retarder – Position of thrust member relative to chamber
Reexamination Certificate
2005-12-13
2005-12-13
Butler, Douglas C. (Department: 3683)
Brakes
Internal-resistance motion retarder
Position of thrust member relative to chamber
C188S287000
Reexamination Certificate
active
06974002
ABSTRACT:
An adjustable shock absorber for applying a force to a moving member so as to decelerate the member. The present invention provides a cylindrical outer tube having a plurality of circular, angular grooves formed in the inner surface of the tube. A cylindrical inner tube is rotatably disposed within the outer tube. A piston is slidably disposed within the inner tube and is engageable with the moving member. The piston moves between a compressed position and an extended position. The inner tube has a plurality of apertures extending therethrough and fluidly communicatable with the grooves in the outer tube. A screw thread is formed in the outer surface of the inner tube and is fluidly communicatable with the grooves in the outer tube. The inner tube and the outer tube rotate with respect to each other to adjust the level of fluid communication between the rearward end and the forward end of the shock absorber to adjust the level of force applied to the moving member. The use of the screw thread on the inner tube increases the efficiency of the manufacturing process as opposed to conventional processes.
REFERENCES:
patent: 3693767 (1972-09-01), Johnson
patent: 4026533 (1977-05-01), Hennells
patent: 4044865 (1977-08-01), Tourunen
patent: 4059175 (1977-11-01), Dressell et al.
patent: 4071122 (1978-01-01), Schupner
patent: 4298101 (1981-11-01), Dressell, Jr. et al.
patent: 4690255 (1987-09-01), Heideman
patent: 4702355 (1987-10-01), Heideman
patent: 5050712 (1991-09-01), Heideman
patent: 5159997 (1992-11-01), Heideman et al.
patent: 5598904 (1997-02-01), Spyche, Jr.
patent: 2004/0182662 (2004-09-01), Heideman
patent: 55020936 (1980-02-01), None
patent: 59-147133 (1984-08-01), None
patent: 5914733 (1984-08-01), None
patent: 1-220733 (1989-09-01), None
patent: 01220733 (1989-09-01), None
patent: WO 2004/085872 (2004-10-01), None
Ace Controls, Inc.
Butler Douglas C.
Price Heneveld Cooper DeWitt & Litton LLP
LandOfFree
Adjustable 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 Adjustable shock absorber, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable shock absorber will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3479928