Pressure actuated axial locking

Details Pressure actuated axial locking Pressure actuated axial locking

1986-10-23

1988-11-15

Garrett, Robert E.

Expansible chamber devices

With releasable stop or latch means to prevent movement of...

Means includes element interfitting between working member...

92 23, 92 31, 92 27, 92 28, F15B 1526

Patent

active

047840447

ABSTRACT:
The present device is intended to lock a member, such as a tool, substantially without play into a form-locked position which can be released only by a fluid pressure intentionally applied to the device. The construction is such that small clamping strokes or displacements can be performed and so that the form-locking or arresting force is maintained as long as desired and with safety. For this purpose a pull rod having, for example, a ring channel, is insertable into a socket type of receiver equipped with radially movable locking elements which cooperate with their own slanted surfaces with slanted surfaces of the pull rod and with slanted surfaces of a ring piston. Certain cooperating surfaces have a slant angle which is smaller than a self-locking angle. The release is possible only if the ring piston is exposed to a fluid under pressure.

REFERENCES:
patent: 2741166 (1955-03-01), Otta
patent: 3967830 (1976-07-01), Smith
patent: 3992019 (1976-11-01), Crawshay
patent: 4537113 (1985-08-01), Stoll et al.
Article entitled "Hydraulikzylinder mit integrieter Verriegelung", from Der Konstrukteur of Jun. 1985, p. 65.
"Hydraulik", from Fluid, of Jan. 1984, p. 34.

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