Implements or apparatus for applying pushing or pulling force – Screw
Patent
1974-10-02
1976-03-02
Smith, Al Lawrence
Implements or apparatus for applying pushing or pulling force
Screw
B66F 308
Patent
active
039413527
ABSTRACT:
The embodiment of the invention disclosed herein is directed to a lifting jack having an upstanding hollow strut member for rotatably receiving a screw rod therein. The strut member has a flat front wall which forms a glide surface and inwardly turned portions to form a rear glide surface. The inwardly turned portions are spaced apart to provide a longitudinal opening through which extends a slide member secured to a load-lifting support element. The upper end of the screw rod is provided with a non-circular configuration having flat side wall portions and shoulder portions extending therefrom to be inserted into a recess formed in a washer which is to rotate therewith. The washer bears against a pair of thrust disks which are positioned between the upper end of the strut member and the washer. The thrust disks provide multiple thrust bearing surfaces for increased wearability and ease of turning under heavy loads. The lower portion of the screw rod is flattened to prevent unthreading of the screw rod from the load-bearing member. The load-lifting support element has spaced apart sidewall portions on opposite sides of the strut member and a load-bearing front wall portion and a load-bearing rearwall portion which are spaced from the strut member by means of glide elements positioned therebetween. The glide elements substantially reduce the amount of friction existing between the load-lifting support element and the strut member.
REFERENCES:
patent: 2176014 (1939-10-01), Ryerson
patent: 2731232 (1956-01-01), Lucker
patent: 2784939 (1957-03-01), Palka
patent: 2895712 (1959-07-01), Stovern
patent: 2980397 (1961-04-01), Lucker
patent: 3013772 (1961-12-01), Atherton
patent: 3356184 (1967-12-01), Bidgood
Nehrig R. Harlan
White Nicholas J.
Auto Specialities Manufacturing Company
Smith Al Lawrence
Watson Robert C.
LandOfFree
Bumper screw 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 Bumper screw jack, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bumper screw jack will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1273724