Control of a double-action pneumatic drive

Details Control of a double-action pneumatic drive Control of a double-action pneumatic drive

1986-03-07

1989-04-11

Ostrager, 30en M.

Motors: expansible chamber type

Fluid supply through diverse paths to single expansible chamber

91 16, 91421, 91463, F01B 2502, F15B 1108

Patent

active

048195413

ABSTRACT:
The drive is controlled such that reduced pressure is applied during a forward motion phase and venting flow from the drive is used as dynamic control pressure to hold off application of full driving pressure until, through physical impediment, piston movement stops. This way rebounding is prevented and strong holding pressure (e.g. on welding electrodes) is made available after a low power motion phase.

REFERENCES:
patent: 4107923 (1978-08-01), Budzich
patent: 4606257 (1986-08-01), Pfister
patent: 4610193 (1986-09-01), Barker et al.

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