Brakes – Internal-resistance motion retarder – Valve structure or location
Patent
1987-11-25
1989-05-16
Kashnikow, Andres
Brakes
Internal-resistance motion retarder
Valve structure or location
188282, F16F 934
Patent
active
048301523
ABSTRACT:
The invention relates to shock-absorber pistons which have a piston body mountable on a piston shaft, the piston body having on both faces a circumferential chamber and these chambers being covered by valve spring disks which rest on circumferential shoulders around the circumferential chambers. The piston body has counterflow channels each leading from the circumferential chamber on one face to an aperture outside the circumferential shoulder on the opposite face. In order especially to produce a degressive response to shock as speed increases, and for this purpose to lower the transit flow resistance of the piston body as much as possible, this body is provided with a flattened zone outside of the circumferential shoulder, and provided with transit channels covering the entire area of the body except for radial partitions between the channels, the transit channels extending from radially narrow circumferentially elongated arc shaped slots to circumferentially-short or radially broad trapezoidal openings into the circumferential chambers.
REFERENCES:
patent: 3088556 (1963-05-01), Bourcier de Carbon
patent: 3113644 (1963-12-01), Wossner
patent: 4121704 (1978-10-01), Nicholls
patent: 4474271 (1984-10-01), Molders et al.
patent: 4724937 (1988-02-01), Fannin et al.
patent: 4733922 (1988-03-01), Nishimura et al.
patent: 5624347 (1986-11-01), Mourray
Doench Jurgen
May Ewald
Rauert Max-Otto
Sporenberg Heinrich
August Bilstein GmbH & Co.
Dubno Herbert
Graham Matthew
Kashnikow Andres
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