Implements or apparatus for applying pushing or pulling force – Rack and pinion – Geared
Patent
1986-06-02
1987-10-27
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Rack and pinion
Geared
254420, 254427, 74405, B66F 316
Patent
active
047024585
ABSTRACT:
A jacking apparatus having a quick release mechanism for disengaging the main shaft of the jack from the jacking gear to allow the main shaft to be selectively raised and lowered as desired without operating the jacking gear. The main shaft has a plurality of teeth disposed thereon in facing relationship with the jacking gear, which is preferably a worm gear mechanism. A stop bar is disposed between the shaft and the jack housing to hold the shaft in alignment with the worm gear mechanism when it is desired to operate the jacking gear. A spring-biased pin member extends through a diagonal slot disposed in the jack housing to engage the stop bar. When it is desired to disengage the shaft teeth from the jacking gear teeth, the user exerts upward pressure on the pin member to move the pin member and stop bar diagonally upward along the axis of the slot, thereby retracting the stop bar from the shaft and allowing the shaft to be rotated to disengage the shaft teeth from the jacking gear teeth. The shaft can then be rapidly moved up and down as desired by the user when there is no load on the jack. To re-engage the shaft teeth with the jacking gear teeth, the user merely rotates the shaft back in the opposite direction, whereupon the spring bias will return the pin member and stop bar to their original position to lock the shaft in place.
REFERENCES:
patent: 658574 (1900-09-01), McDonnell
patent: 947573 (1910-01-01), Eager
patent: 2133892 (1938-10-01), Gelinski
patent: 3623718 (1971-11-01), Thomeczek
patent: 3921958 (1975-11-01), Brockelsby et al.
patent: 3934852 (1976-01-01), Weber et al.
LandOfFree
Quick release jack does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Quick release jack, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quick release jack will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1267729