Expansible chamber devices – With releasable stop or latch means to prevent movement of... – Plural selectively operable actuators for releasable means
Patent
1998-09-16
2000-12-26
Lopez, F. Daniel
Expansible chamber devices
With releasable stop or latch means to prevent movement of...
Plural selectively operable actuators for releasable means
92 24, F15B 1526
Patent
active
061641863
ABSTRACT:
A jack (1) has a jack body (2) with a peripheral wall (3) which forms a jack chamber (4). Two pistons (5a, 5b) attached to piston rods (6) are movably mounted in the jack chamber. The jack (1) has an automatic locking section (MV) to lock the two pistons (5a, 5b) and their respective rods (6) in at least one of two extreme positions. The locking is done automatically during the movement of the pistons (5a, 5b) by locking balls (11a, 11b) which move in locking grooves (10a, 10b) in the piston (6). There is also a manual unlocking device (MDV) connected to the pistons (5a, 5b) through unlocking rods (21). The manual unlocking device (MDV) is attached to two unlocking collars (7a, 7b) which rotate to unlock the piston (5a, 5b) and piston rod (6). The rotation, in turn, moves adjustment screws (23) to displace the unlocking rods (21) along their axes.
REFERENCES:
patent: 2434828 (1948-01-01), Ashton et al.
patent: 2655058 (1953-10-01), Eschenburg et al.
patent: 4240332 (1980-12-01), Deutsch
patent: 4323001 (1982-04-01), Masclet et al.
Etablissements Contat Freres
Lopez F. Daniel
LandOfFree
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