Implements or apparatus for applying pushing or pulling force – Single throw lever – Mechanically actuated
Patent
1976-04-06
1977-06-21
Smith, Al Lawrence
Implements or apparatus for applying pushing or pulling force
Single throw lever
Mechanically actuated
B66F 324
Patent
active
040307018
ABSTRACT:
A pneumatic vehicle jack comprises a jack cylinder with a body and a piston rod assembly movable relative to each other, two levers pivoted to said body or piston rod assembly, located on either side of the longitudinal axis of the jack cylinder and carrying vehicle and ground engaging shoes, and two struts pivotally mounted between said levers on the one hand and said piston rod assembly or cylinder body on the other hand. A cartridge of compressed gas can be removably connected to said jack cylinder for actuating the same. Actuation of the jack cylinder causes the pivot points of the levers and struts to be brought closer together, to move the shoes away from each other. At the beginning stage of the actuation movement, the lever system comprising the levers and struts reduces the force exerted by the jack, and at the end of the said movement it increases said force. Because the volume occupied by the gas contained in the cartridge increases during the actuation of the jack, the force exerted by the jack cylinder progressively decreases. Thus, the lever system compensates for this decreasing force and a substantially constant force is exerted by the vehicle jack over its whole stroke, and the raising movement of the vehicle is also progressive and constant.
REFERENCES:
patent: 1492159 (1924-04-01), Caretta
patent: 1590830 (1926-06-01), Jewkes
patent: 1638859 (1927-08-01), Knowles
patent: 2341278 (1944-02-01), Long
patent: 2606469 (1952-08-01), Morgenthaler
Smith Al Lawrence
Watson Robert C.
LandOfFree
Pneumatic vehicle 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 Pneumatic vehicle jack, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pneumatic vehicle jack will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-731931