US1476748A - Hydraulic-hoist heater - Google Patents

Description

Dec. M, 1923,.- Lm' G. A. woon HYDRAULI C HO I S T HEATER Filed March l5 1920 Y l/ IW 'Wl @E I CU.

, l SMI/UMNO@ @argelcl WOO fbko'zfl/m 'suchas an e Patented Dec. 11, 1923.

UNITED #STATES PATENT oEFlcE.

GARFIELD A. woon, or ALGONAC, MICHIGAN.

HYDRAULICf-HOIST HEATER.

lApplication filed Marohf15, 1920. serial No. 366,102.

the following isa specification.

As is a matter of common knowledge, the device most used for tilting the bodies of self-propelled vehicles is the hydraulic hoist the cylinder or cylinders of which are differently arranged in the various constructions. For example, in the most usual type the cvlinder is upright, being positioned forwardly -of the body, 4while in other cases the cylinder or cylinders is placed below the body and arranged either substantially horizontally or in upright fashion. In each instance oil is the pressure fluid generally. employed, but some difficulty isexperienced in the colder weather on account of the fact that oil of the proper consistency to prevent freezing does not flow freely' through the pump and associated passages1 particularly when the hoist has not been usedfor several hours. The resulting friction of `course involves some loss of power, and difficulty is sometimes experienced in that the body fails to settle of its o wn accord after the load has been discharged.

These objections I overcome by the present invention which provides means under control of the driverl for applying heat, preferably waste heat from the engine, to the circulatory 1i uidto insure the desirable free-flowing-con ition. It will be understood that an well-known heating element lhctri'c coil or grid might be used, but I prefer to take the heat from the exhaust gases, and for this purpose If pre-4 ferably attach to the exhaust pipe a valvecontrolled hose Vconnection leading to a jacket element preferably surrounding a portion of the hoisting cylinder. Other hot engine fluids such as the cooling liquid or airmight be utilized for the same general purpose, but AI prefer to use the exhaust gases for obvious vreasons.

f- A more specific object of the invention is to provide apparatus for the purpose stated of such nature as to be readily appliedto existing constructions, but the jacket may be built as a permanent part of the initial truck construction if desired.

Another 'object is` to `provide apparatus for the purpose' vstated. wherein one main element may be applied to the engine. and

another to the hoist, and wherein said elements are joined by a fluid transmitting connection which need .not be cut to correspond to the different relative locations of said elements in the trucks of different manufactures.

A further object is to devise an inexpensive apparatus for the purpose set forth.

In the drawings: A

Fig. 1 is a side view,parts being omitted,

showing the preferred manner of applying the invention to a truck wherein the hoist.

is of the upright type 'positioned'forwardly' of the body. Fig. 2 isasection on line 2-2 of Fig. 1, the piston being elevated.

Fig. 3 is an-enlarged horizontal section corresponding to Fig. 2, and

Fig. 4 is a view corresponding to Fig. 3 andtaken from the righ-t hand end thereof. 1 indicates the wheels and 2 the frame of an ordinary truck whereon the body 3 may be tilted when the piston and cross-'bar construction 4 is elevated in the cy1inder`5 as explained' in my 4Patent No. 1,271,969,

granted July 9, 1918. A more detailed description of the apparatus is not thought necessary, but it will be observed that the base castin frame 'or ars 7 centrally of the vehicle.

6 of the hoist rests onthe cross- The usual exhaust pipe and muiier forthe internal combustion propelling engine 8 ap` pear at 9 and 10, respectively; and pumping apparatus (not shown) driven by theV engine is provided for forcing the working fluid between the base' and the piston to elevate the latter in the general manner in'- dicated in said patent.

In accordance with thev invention I preferably provide the section 11 ofthe exhaustv pipebeyond the muliier with a lateral opening 12 and secure' around this opening as by means ofthe U-bolts 13, a fitting 14 to which one end of the hose or flexible conduit or tube 15 isattached, the opposite end leading into a acket for the lower end-portion of the cylinder. This' jacket may be formed in various ways, either'permanently with the basel orotherwise, and in the embodiment shown it comprises two sections 16-17 bolted together at 18, the section 16 having an internal rib 19 extending longitudinally of the cylinder and being provided with an outlet opening. o r openings 20.- There is thus formed a jacket chamber through which ezthaust gases 'from the hose 15 pass in the manner indicated bythe arrows in Fig". 2 to heat the oil or other liquid Within the cylinder.,

` valves or the equivalent may be constructed,

positioned and operated in various Ways and the particular showing is merely by Way of example.

During cold Weather the driver sets the gate or gates the Working liquid at the proper temperature to rvinsure free-flowing, but in Warm Weather the better practice is to close od the conduit 15 altogether, but the parts may be so constructed 'or adjusted that a small pro# portion of thegases'will pass through thek jacket 16-17 under -all circumstances. The

device 1s inexpensive and in the embodiment shown may be readily installed on existing equipment. It is evident that various other devices utilizing heat developed by or traceable rt-'o the propelling engine or power plant may be used, but 1 re ard my mvention'ias 'including an even broa er conception in that l regard myself as the 'first'to employ any heating apparatus-portable with the vehicle for heating the Working fluidnpf the hoist at Will. hydraulic hoist may in; some instances. be used for purposes other than the tilting of a body on the truck. The flexibility of the conduit 15 permits the baseA 6 to sink somewhat as theload is applied Without applying stressto the exhaust pipe 11 and moreover provides Jfor ready adaptation of the device to installations wherein the relative in such manner as'to maintain.`

It Will Ybe evident further that the :navega-'e location orn the exhaust line and the hoist varies to a considerable extent. Various other types of givc-and-take connections might be employed.

Again, it) Willbe readily understood that while l have shown the hydraulic hoist mounted directly on the truck or tractor of which the engine forms a part, it may in fact be vmounted. on an ordinary trailer or on a semi-trailer resting upon or drawn by the self-propelled vehicle, the hot exhaust gases being passedto the hoist through a hose in aY A@il manner which will be obvious.

l claim:

1. A vehicle including an internal combustion engine having an exhaust conduit, a

hydraulic hoist on the vehicle adjacent said conduit,-jacket forming. means for a portion voit. the circulating system of the hoist, and a conduit forming a give-and-take connection between said exhaust conduit and said means whereby exhaust gases may be applied to heat the Working liquid of the hoist.

2. A vehiclevcomprising a hydrauliclhoist including a hoisting cylinder, jacket forming means for a portion of said cylinder, a.

propelling engine for the vehicle, and means for directing hot fluid from the engine to,-

said' jacket forming means to Aheat the Working liquid in`said cylinder.

3. A vehicle including a propelling engine, an upright hydraulic hoist carried by the vehicle, said hoist including a cylinder, a

jacket encircling the cylinder to form aheating chamber therefor near the base thereof,

and means for directing Waste heat from the engine to said jacket.

4. A` vehicle including al propelling engine having a conduit forl exhaust gases, a hydraulic hoist on the vehicle, a fitting secured on said conduit, anda llexible conduit forv directing hot fluid from said fittingto said hoist to heat Working liquid for lthe latter to a temperature at which itiiovvsfreely.

GARFIELD A. Woon.

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