US2868502A

US2868502A - Lifting device

Info

Publication number: US2868502A
Application number: US505171A
Authority: US
Inventors: Viebke Algot Leonard
Original assignee: Individual
Current assignee: Individual
Priority date: 1955-05-02
Filing date: 1955-05-02
Publication date: 1959-01-13
Anticipated expiration: 1976-01-13

Description

Afforneys Jan. 13, 1959 A. L. VIEBKE LFTNG DEvcE: v

Fi1ed May 2. 1955 L1ETING DEv1CE A1gof Leonafd viehke, Sfockhon1, Svveden AppHoaooo Moy 2, 19s5, Sefia1 Nol ss,171

1 c1oim, (CL Zs4-93) The pfesent invention fefefs to soch a lifting devioe as coInpfiSes tWo of ffofe oolufnns With SectionS af fanged fof te1eScopic moveInent in each othef. Eaf1feT SUch lifting deviceS have been pfovided with Iocking nlechanisIns and valveS of other expenSive IneanS to n1ake the piSfons n1ovo in the coffect succession and e1iII1inate distufbing iston alterafions, speed diffefeoces and vafying pfeSSufe of the mediun1 used for Hfting. The pfesent invention eHn1inafes the need of soch expenSive devices. The chafactefistic featufes of fhe pfes, eot invention afe that evefy Section i11 one colun1n is coobined vvith thaf of those sectionS in the other coloInn of colunnS Which iS the Same number of sectionS ffoIn a given end of the coloInn, and that each gfoup of cofnbined seofionS has the salT1e tota1 pfesSure area. The pistons vvf11 antoInaticany fo11ow each other With the san1e Speed, and aS a fesu11 it is of no iInpoftance Which of the piSton unitS staftS oloving at the faising of lowering opefation.

Fofther features and advantageS of the invenffon vvin appeaf ffolI1 the follovving deScription, Tefefence being had fo the acconpanying diagrafnInafic dfavving i1II1S tfating a pfefefred embodiment of a lffting device compfising tvVo co1on1ns.

Fig. 1 ShoWs a Side vieW of said Hfting device;

Fig. Z is a Secffona1 vieW a1ong line Zz of Fig. 13 and Figl 3 is a Sectiona1 vieW along line 3-3 of Fig. 2.

The lifting devico compfises tWo coluInnS 1 and 2. Each of the colUnnS 1 and 2 includes on one hand a oylindef 3o and 30 and on the othef thfee SectionS 4o, 4o, 5, sZ) and oo, oo, Which are telescopicany movable. In colun1n 1 the sections 4o, so and ozZ, counting ffom be1ovv, have decfeaSing afeas, WhilSt the sections sZ), 40 and 30 in column Z have afeas Which incfeaSe ffofI1 below. Accofding to the embodiment shown the tWo colnfnns 1 and Z afe identical and opposed.

The Sectfons 4o and so have the SaIne cofnn1on afea as the Sections so, 4o and the Secfions oo, 3 Z), fespec tive1y, The Sections 4 and 3o may thos have an afea of 100 square onits, the sectionS so and 4o an afea of 86 squafe unitS and tho sections oo and so an afea of 2 72 Sq-uare unitS. The HgureS are given in a Suitable unit of area. The tofa1 afea of each of the above three paifs of sectionS iS therefoTe 17Z Square units The tvVo teleScopic sections 4 and so, Second ffofn be1ow, in the tWo columns 1 and 2 afe united by means of ang1e iron 7, and the two teleSco1)ic Sections So and 4Z), Which have equany lafge afeas, afe united by fneanS of an angle ifon 8. The tWo oppefInost tele scopic Sections o and 3o are intended to be United by Ineans of a lifting plafform 10 of likeconnecting device. The lovverInosf telescopic SectionS So and oo are Sup pofted on a stationafy base 11, to which they are united. By uniong the feleScopic SectionS in the Way deScfibed above a liffing device is obfained, all unifS of which have the san1e afea.

111 CaSe the 1ifting device ooiTlpfiseS foof, SiX, eight etc. colun1nS an Said colufnnS can be identical like thoSe acoofding to the eI11bodiInent Shovn, one ha1f being difected in one direction and the Second ha1f in the othef difection. A1So in this eInbodilT1ent the pisfons in each paif of coII1Infls can be united vith each otheT by nleans of angle ifons. The fufther connection of the piStonS is then affanged in a S11itab1e vay.

The invention is not feStficted to thB featufes de scribed above and Shown in the dfaWin1g but can be varied in Inany WayS Within the Scope of the appendant c1aiIn. The colunlnS can thuS bo thfee, five, Seven efc., in vvhich caSe the colun1nS need nof be identicaL The nun1ber of pistons in each colun can of coufso be varied within vvide liInitS.

What I claim and deSife to secofe by Leftefs Pat ent is= IIydfauIic telescopic lifting appafafus coolpfising tvvo pafallel coluInnS positioned beside each other, each of Said colunonS consiSting of fhe saIne non1bef of fe1e- Scopic sectionS and Which afe connected to a SoLlfce of pfeSSure n1ediunT, a base with which the lovVefn10St teleScopic Section in each co1un1n is engaged, a plat fofm connecting device With Which the upperInost tele Scopic Section i each colnIno iS engage(1, the coluInnS being arfanged olosely to each othef, each telesoopio Secfion in one coIUn1n, counting ffoIn tfle lafgef end of Said c(111Inn, figidly connected to that teleScopic sec tion in the othef column Which iS the san1e numbef of sectionS ffom the sInanef end of the othef colIITnf1, each paif of connected SecfionS having an equany large pfeS- sufe afea aS the preSSufe afea of each of the othef paifS of connected sectionS.

1efeTenoes Cffed in the file of this patent UNITED STATES PATENTs Z,163,9S9 NilSon 1une 27, 1939 2,Z40,794 MaSon May 6, 1941 2,7Z4,572 vVeinbefg 1`Iov. ZZ 19S5