US 1492159 A
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April 29 192%,
E. CARETT LIFTING JACK Original Filed June 6, 1922 vma Patented pr. 29, 1924.
UNITED STATESv 11,492,159 PATENT OFFICE.
ETTORE CARETTA, OF TURIN, ITALY'.
Original application med June 6, 1922, Serial No. 566,276. Divided and this application lled August 8,
1928. Serial Nb. 856,088.l
To all whom t may concern:
Be it known that I, ETTORE CAnn'rrA, subject of the King of Italy, residing at Turin, Italy, have invented certain new and useful Improvements in Lifting Jacks, of which the following is a specification. v
This invention relates to liftin jacks and more particularly to jacks lifting member movable in said base and a collapsible chamber arranged between said base and member, this chamber being adapted to receive a fluid under ressure for the purpose of lifting said mem er and its load.
According to the-present invention a 'ack of the kind above referred to is provided with means for admitting in said collapsible chamber a gas charge from a receptacle or cartridge in which said as is stored in liquid state (known as sparklet s) this as being permitted to expand in sa 1d chamer and producing therein the lifting pressure.
A. constructional form of an improved 'ack according to the present invention is illustrated by way of example on the annexed drawing in which /1- Figure 1V is an axial section of the iinproved jack in its4 normal position before ifting;
Figure 2 is a similar section showing the lifting member in a raised position.
In the illustrated example the improved jack comprises a hollow stationary base 1 open at the top, and in the mouth 2 ,of which there is mounted so as to be capable of vertical motion a tubular lifting' member 3.
This liftin member carries an adjustable head 4, pre enably by means of a screwthreaded spindle 5 screwing in a screwthreaded hole in the top 6 of the lifting member 3.
Said member 3 is provided with an abutment 3 for stopping it when it has reached its uppermost position.
Between the inside wall of the base 1 and the youtside wall of the member 3 there is a space in which is located a dexible chamber 7 having preferably the shape shown onthe drawing, which is such that its upper half is readily capable of collapsing into its lower half as shown in Figure 1.
Said chamber 7 is made of suitable material, for instance rubber, so as to be caor lifting vehicles, comprising a stationary base, a
pable of being inflated and expandingunder internal pressure from the shape shown in Figure l to that-shown in Figure 2. In the case of rubber, the wal-1 of the air chamber 7 is referably reinforced by a network 7 of suitable material incorporated in the rubber for the pu ose of giving it the .strength 4necessary or withstanding high internal pressures while avoidin the necessity of enclosing said chamber in an outer cover.
In' order to effect the inflation of the chamber 7 by using `cartridge or receptacles filled with a compressed gas in liquid state (such as liquid carbonio acid) the collapsible chamber 7 is provided with a union 8 comprising a socket 9 forming a mouth. A perforated needle 10 is arranged central-ly in the mouth of said socket and has its perforation opening in the passage of the union 8. Said socket mouth is provided with a packing washer 19 and has an outer screw-thread on which is threaded a sleeve 20 of a support 11 intended to receive a cartridge 12 and having an abutment 21 for the cartridge end as well as a rib 17 for t grasping and manipulating it.
Said cartridge 12 contains a gas in liquid state, as carbonio acid, and its mouth is closed by means of a metal plug (not shown) adapted to be perforated by the needle 10.
For the o eration, the jack is located iinder the load and its lifting head d is carried in Contact with the said load by manipulating the'screw 5; then a cartridge 12 is located in the support 11 and its mouth is inserted into the packing 19 and finally the support 11 is rotated by its' rib 17 to force the cartridge 12 against the perforating pin 10. The cartridge plug is thus perforated and the cartridge space is putin communication with the chamber 7 through the perforation of the pin 10 and the .5. of the union 8; owing to the increase in vounie free for the cartridge content, the gas enclosedi init in liquid state is permitted to expand and to enter in gaseous state the chamber 7 to inate it and to raise the lifting member 3 supported thereby and the load. The parts are thus carried in the position shown by Figure 2 in which the chamber 7 is shown in its expanded shape.
The improved jack is very light because all gearing is done away with; it can be ica so that it can be utilized as a container for storing a suitable number of sparklets 12 to be employed for operating the jack.
The s ace left free intermediate the base wall an the wall of the lift-in member 3 is preferably small, as shown, or the purpose of reducing to a minimum the portion 22 of the chamber 7 subjected' to pressure and not supported by rigid parts, and therefore the tensile stress acting on said chamber.
Attention is called to my copending application No. 566,276, filed June 6, 1922, in respect of features not claimed per se in this application, but described or illustrated.
What I claim as my invention and desire to secure by United States Letters Patent 1. A fluid operated lifting jack comprising a hollow base, a member movable in said base, an inflatable collapsible chamber between said base and member, a receptacle containing a gas charge in liquid state, and means for putting said receptacle in communication with said chamber to produce a lifting pressure therein.
2. A fluid operated lifting jack compris-- ing a hollow base, a lifting member movable in said base, an inflatable collapsible chamber between said base and member, a receptacle containing a gas charge in liquid condition, means for connecting said receptacle with said chamber and means for opening said receptacle to introduce said gas in said chamber and produce a lifting pressure therein.
3. A fluid operated lifting jack comprising a hollow base, a lifting member movable in said base, an inflatable collapsible chamber between said base and member, a union connected with said chamber, a support on said union, a receptacle containing' a gas charge in liquid condition adapted to be arranged in said support, cooperating means on said union and support for putting said receptacle' in communication v with said chamber to introduce said gas in said chamber and to reduce a lifting pressure therein.
4. A fluid operated lifting jack comprising a hollow base, a lifting member movable in said base, an inflatable colla sible chamber between said base and mem er, a union connected with said chamber, a support on said union, a receptacle containin a gas charge in liquid condition adapte to be arranged in said support with its mouth in register with said union, means -in said union for perforating the mouth of said receptacle cooperating means on said su port an union for forcing said receptac e with its mouth against said erforating means for the purpose of intro ucing said gas in said chamber and producing a lifting pressure therein.l
5. A-fluid operated lifting jack comprising a hollow base, a lifting member'movable in said base, an inflatable collapsible chamber between said base and member, a union connected with said chamber, a support on said union, a receptacle containing a gas charge in liquid condition adapted +o be arranged in said support with its mouth in register with said union, means in said union for perforating the mouth of said receptacle, a screw-threaded ortion on said union and a screw threads collar on said support engaging said screw threaded portion of said union for forcing said receptacle with its mouth4 against' said perforatin means, for the purpose of introducing said gas in said chamber and producing a lifting pressure therein.
. 6. A' fluid operated lifting jack comprising a hollow base, a lifting member movable in said base, an inflatable collapsible chamber between said base and member, a receptacle containing a gas charge in liquid condition, means for putting said receptacle in communication with said chamber to produce a lifting pressure therein and an adjustable load supporting head on said lifting member, this lifting member being hollow for storing therein said' receptacles to be vused in connection with the jack.
In testimony whereof I have signed my name to this specification. i