Linear drive

Details Linear drive Linear drive

1992-08-28

1993-07-20

Denion, Thomas E.

Expansible chamber devices

With cushioning means effective over a portion only of stroke

92 136, 92 138, 91 25, 91 27, F01B 1102

Patent

active

052283801

ABSTRACT:
A linear drive comprising a drive member adapted to be reciprocated axially in a housing between two end positions. Opposite to the former there is a wall on at least one axial side. There are means to reduce the impact in the end position, such means having an annular lip. The lip is arranged on the drive member or on the wall and respectively faces the wall or the housing. The lip defines a damping space which is open on an impact side. If the drive member approaches one end position thereof, the damping space is occluded and reduced in volume so that some trapped fluid will escape via a relief opening so that there is a braked part of the stroke. Using simple means it is therefore possible to provide an extremely efficient fluid damping at the end position.

REFERENCES:
patent: 2718842 (1955-09-01), Klemm
patent: 3152095 (1964-11-01), Heiser
patent: 3255675 (1966-06-01), Reeve et al.
patent: 3605553 (1971-09-01), Panigai
patent: 3805672 (1974-04-01), Pekrul

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