Hydraulic unit

Details Hydraulic unit Hydraulic unit

2007-12-11

2007-12-11

Lazo, Thomas E. (Department: 3745)

Motors: expansible chamber type

Independently operated timer, delay, pattern or cyclic control

Fluid actuated valve with volume chamber delay means

C091S445000

Reexamination Certificate

active

11202157

ABSTRACT:
An hydraulic unit includes a hydraulic cylinder, and a piston retained in the hydraulic cylinder, wherein the piston can be moved from a first end position located at one end of the hydraulic cylinder to a second end position located at the opposite other end position of the hydraulic cylinder. The hydraulic cylinder is hydraulically connected with a delay unit which is equipped with an auxiliary cylinder containing an auxiliary piston, with which a movement of the piston can be delayed in a middle section located between the first and the second end position. The auxiliary cylinder has a first and a second opening for incoming and outgoing hydraulic oil. In order to precisely set an attenuation point, a throttle valve provided on the auxiliary cylinder or piston be connected in the flow path.

REFERENCES:
patent: 2664106 (1953-12-01), Livers
patent: 4428081 (1996-02-01), None
patent: 01083928 (1989-03-01), None

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