Claims
- 1. An improved jack for lifting a body, comprising a base, supporting arms carried by the base, an engaging member carried by the supporting arms for engaging the body to be lifted, at least two of the supporting arms carrying a lead screw having a driven end and an upstanding integral boss proximate the driven end, the jack having disposed at the driven end adjacent and abutting the upstanding integral boss securing means having an opening therethrough for passage of the lead screw and being interconnected with the arms and the engaging member to prevent movement of the securing means when the lead screw is driven, the driven end comprising a body abutting the upstanding boss and including an opening therethrough for receiving the end of the lead screw, the body carrying means radiating from the opening and being in communication with the opening and carrying material from the lead screw displaced into the means thereby securing the body to the lead screw, whereby when a driving force on the body exceeds a predetermined torque the body will shear from the lead screw, the upstanding integral boss of the lead screw abutting the securing means retaining the jack in position.
- 2. The improved jack of claim 1, wherein the lead screw is secured to the body by staking.
- 3. The improved jack of claim 1 or 2, wherein the body comprises a slotted hex-nut.
- 4. The improved jack of claim 1 or 2, wherein the body comprises a castellated hex-nut.
- 5. The improved jack of claim 1 or 2, wherein the jack is a scissors jack and at least two supporting arms are scissors arms connected together.
- 6. An improved jack comprising a pair of non-rotatable abutting planar plates, and a pair of arms, the ends of which arms are secured to the pair of non-rotatable abutting planar plates, the abutting plates comprising longitudinally directed openings therethrough, for the passage of a longitudinally extending lead screw therethrough, each plate carrying laterally extending projections from each side, the side of each projection directed toward the other plate being generally flat and extending in the same plane as the planar plate and the other side being curved to present a segment of a circle, the projections when the planar plates abut presenting a circular formation having a diameter "D", the ends of the projections remote the plates being enlarged, the end of each arm proximate the other arm carrying laterally directed circular openings having the same diameter "D" as the abutting projections for carrying the laterally extending projections of the plates, the openings being in communication with slots entirely through the arms, the slots being smaller than the circular abutting projections and the enlarged ends, but being larger than the cross-section of each projection to permit the projections one at a time to be moved through the slots into the openings, the slots of one arm opening in one direction when the arm is mounted for use and the slots of the other arm opening in another direction when that arm is mounted for use whereby after the projections of one plate are inserted through the slots and the projections of the other plate inserted through the slots and the plates permitted to abut with the flat faces of the projections abutting and with the arms mounted for use, the slots of one arm open in one direction and the slots of the other arm open in the other direction.
- 7. The jack of claim 6, wherein the jack is a scissors jack and one arm is from a pair of scissors arms of a scissors jack and the other arm extends from proximate the end of the arm from the pair of scissors arm and is connected to the portion engaging the vehicle.
- 8. The jack of claim 6, wherein the two directions are opposite one another when the arms are mounted for use.
- 9. The jack of claim 7, wherein the two directions are opposite one another when the arms are mounted for use.
- 10. The jack of claim 6 or 7, wherein the directions of the slots are upwardly and downwardly when the arms are mounted for use.
- 11. An improved scissors jack comprising a longitudinally extending lead screw having a driven end and an upstanding integral boss proximate the driven end, a pair of scissors arms pivoted about their middle for scissors motion, the lower ends of the arms being secured to a base, the other end of one of the scissors arms being secured to a non-rotatable threaded sleeve, the sleeve for receiving and securing the lead screw, the other arm secured to a pair of abutting planar plates having longitudinally extending openings through the plates through which the lead screw passes, the said planar plates also securing another arm which arm is operable by the scissors arms and lead screw for lifting a vehicle, the lead screw securing a body abutting the upstanding boss and the body including an opening, a longitudinally extending opening therethrough for receiving the end of the lead screw, the body carrying means radiating from the opening and being in communication with the opening and carrying material from the lead screw displaced into the means thereby securing the body to the lead screw, the abutting plates each carrying laterally extending projections from each side of each plate, the side of each projection directed toward the other plate being generally flat and extending in the same plane as the planar plate and the other side being curved to present a segment of a circle, in cross-section being a portion of a cylinder, the projections when the planar plates abut presenting a circular formation having a diameter "D", the ends of the projections remote the plates being enlarged, the end of each arm proximate the other arm carrying laterally directed circular openings having the same diameter "D" as the abutting projections for carrying the laterally extending projections of the plates, the openings being in communication with slots entirely through the arms, the slots being smaller than the circular abutting projections and the enlarged ends, but being larger than the cross-section of each projection to permit the projections one at a time to be moved through the slots into the openings, the slots of one arm opening in one direction when the arm is mounted for use and the slots of the other arm opening in another direction when that arm is mounted for use whereby after the projections of one plate are inserted through the slots and the projections of the other plate inserted through the slots and the plates permitted to abut with the flat faces of the projections abutting and with the arms mounted for use, the slots of one arm open in one direction and the slots of the other arm open in the other direction.
- 12. The scissors jack of claim 11, wherein the two directions are opposite one another when the arms are mounted for use.
- 13. The scissors jack of claim 11, wherein the directions of the slots are upwardly and downwardly when the arms are mounted for use.
Priority Claims (1)
Number |
Date |
Country |
Kind |
558752 |
Feb 1988 |
CAX |
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Parent Case Info
This application is a continuation of Ser. No. 07/307,990 filed 2/7/89 now abandoned.
US Referenced Citations (8)
Foreign Referenced Citations (8)
Number |
Date |
Country |
1199626 |
Jan 1986 |
CAX |
2352400 |
Oct 1973 |
DEX |
2902579 |
Jul 1980 |
DEX |
3033956 |
Jun 1982 |
DEX |
2132729 |
Jul 1984 |
GBX |
2182308 |
May 1987 |
GBX |
02060 |
Apr 1986 |
WOX |
06707 |
Nov 1986 |
WOX |
Continuations (1)
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Number |
Date |
Country |
Parent |
307490 |
Feb 1989 |
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