US1060496A

US1060496A - Compressed-air jack.

Info

Publication number: US1060496A
Application number: US69211412A
Authority: US
Inventors: Louis J Rouchleau
Original assignee: Individual
Current assignee: Individual
Priority date: 1912-04-20
Filing date: 1912-04-20
Publication date: 1913-04-29
Anticipated expiration: 1930-04-29

Description

L. J. ROUGHLEAU. COMPRESSED AIR JACK.

APPLICATION FILED APR. 20, 1912 19 0 WW. 1 m 4% m OJ T n 1 m 0. J no 9 m m f a 2. n AU 4 a m m 9 W 6 P #m U 47 Q w 0 z M m m. W

L. J. ROUGHLEAU.

COMPRESSED AIR JAGK.

APPLICATION FILED APR.20,1912. {0/155 Patenmd Am: 29, 1913.

' 2 SHEETSSHEET 2.

Inn rnn snares manna? @FFEQE.

. LOUIS J. BOUCELEA U, F ARLINGTON, CALIFORNIA.

COMPRESSED-AIR JACK.

' Specification of Letters Patent. Application filed April 2( 1912. Serial No. 692,11.

Patented Apr. 29,1913.

To all whom it may concern:-

Be-it known that 1, Louis J. Rouomnau, a citizen ofthe United States, residing at Arlington, in the county of Riverside and State of California, have invented new and useful Improvements in *Compressed-Air Jacks, of which the following is a specification.

The .invention relates to lifting jacks and more particularly to the class of compressed air lifting jacks. t

The primary object of the invention is the provision of a device of this character in which compressed airis utilized for oper-- which the same works, thereby avoiding.

fracture of the said piston' head and also rendering the jack noiseless when being operated. a

A further object of the invention is the provision of a lifting jack which is simple in construction, easily operated, reliable and efiicient in its-purpose and inexpensive in manufacture. I

With these and other objects in view the invention consists in the construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawing, and pointed out in the claim thereunto ap 'pended- In the drawings: Figure 1 is a side elevation of a jack constructed in accordance with the invention. Fig. 2 is a vertical longitudinal sectional view thereof. Fig. 3 is a sectional view on theline 33 of Fig. 1. .Fig. 4 is a sectional viewon the line 4- 1 of Fig. 1. Fig. 5 is a fragmentary,

' vertical vsectional view throughthe two part detachable handle. Fig. 6 is a sectional View on the line 66 of Fig. 5. Fig. 7' is a fragmentary vertical longitudinal sectional view through the exhaust pipe and its valve. Fig. 8 is a top plan view of the device.

Similar reference characters indicate corresponding parts throughout the several views in the drawings.

Referring to the drawings by numerals, the lifting jack comprises a base 10, the same being formed with a central circularshaped recess 11 having its side wall provided with screw threads 12 detachably engaged by the exteriorly screw threaded end 13 of a piston cylinder 14, rising from the saidbase 10, the opposite outer end of the said cylinder 14 being exteriorly screw threaded for the detachable engagement therewith of a head cap 15 between which and the edge of the outer end of the said cylinder 14 is placed a packing ring 16- for a purpose hereinafter described.

Formed centrally in the cap 15 is an afperture-17 through which is passed a 1i ing stem 18, provided with an outer screw threaded end 19 and having detachably connected thereto a rest piece 20, on which is adapted to bear the object to be raised by the jack, in a manner to be presently described.

. Theinner end of the stem or bar 18 is formed with a flared portion 21, the same bein centrally connected to a piston head 22, ormed with a concaved face 23, the piston head 22 being designed to work within the cylinder 14, and is adapted to travel longitudinally therein.' The said piston head 22 is formed with a peripheral rim 2 1, upon the upper edge of which is superimposed spaced packing rings 25, between which is arranged a packing 26and against the uppermost packing ring there is an adjustable retaining ring 27 the same being ongaged by means of adjustable clamps 28 having swiveled therein regulating bolts 29, the same threaded in inset lugs 30 formed on the flange 24, whereby on the adjustment of 1 the bolt 29 the ring 27 may be forced tightly against the uppermost rin 25, thereby compressing the packing 26, t ereby causing it to expand outwardly between the rings 25,.

so as to closel contact with the inner surface of the cylinder 14, so as to'form a fluid tight joint between the piston head and the same, thereby avoiding leakage of fluidfrom one side of the piston head to the other within the cylinder.

Forined in-.-; the base are inlet and outlet conduits or vents 31 and 32 respectively, the

inner ends of which 0 en into the lower end of the cylinder 14, while the outer ends have fitted therein couplings or nipples 33 for the connection of the respective inlet and exhaust tubes 34 and 35, the tube 34 being rovided with a back. pressure springeld check valve 36, while the exhaust tube 35 has "connected thereto a hand operated cutoif lobe valve 37 of'the ordinary well-known construction. The inner tube 34 is adapted to be connected with a compressed air pump of any ordinary well-known construction, so as to supply compressed air to the cylinder 1 14, whereby said compressed air will act against the piston head 22 for forcing outwardl a lifting stem, or bar 18 for the raisin 0 an object by the jack.

Vhen it is desired to exhaust the compressed air fluid from the cylinder 14, it is only necessary to open the cutoff valve 37,

whereby the said fluidmay be discharged to the atmosphere.

Fixed to or inte ral with the base 10 at any desired point t erein isa handle receivin socket member 38, in which is detachab y threaded the inner section 39 of a hansame being detachably connected to the inner section 39, thereof, by means of a coupling sleeve 41, thus it being seen that the handle may be shortened or lengthened as the occasion may require and this handle l enables the jack to be placed beneath the object at the proper location for the lifting thereof.'

From the foregoing description, taken in connection, with the accompanying drawing, it is thou ht that the construction and operation of t e.invention will be clearly understood, and therefore, a more extended explanation has beenomitted, i

What is"claimed is:

A piston for air jacks comprising a piston head having a concaved portion at one end and a recess in its opposite end, the walls of the recess being slotted at diametrically op posite points, lugs integrally formed with the walls ofthe recess and projecting into the same and alining with said slots, the said head being formed with a packing seatin the side thereof, an expansible packing located within the seat, packing rings arranged on opposite sides of the packing and mounted within the piston head, a retaining ring circumscribing the said piston head and adjustably movable in the packing seat, clamps mounted in the slots and working against the retaining ring, and adjustable bolt members loosely engaged in the clamps and threaded in the lu s. I dle which includes an outer section 40, the i In testimony whereo I afiix my signature in presenceof two witnesses. LOUIS J. ROUCHLEAU. Witnesses:

ARTHUR BERGERON, VIE. COLE.