US 2603518 A
Description (OCR text may contain errors)
y 1952 c. R. GOLAY 2,603,518
TRUCK 'I'IPPING MECHANISM WITH INITIAL LIFT LEVER Filed Feb. 13, 1948 2 Sl'lEETS-SHEET 1 INVEN TOR. (2/4 P16! 6014) y 15, 1952 c. R. GOLAY 2,603,518
TRUCK TIPPING MECHANISM WITH INITIAL LIFT LEVER Filed Feb. 13, 1948 2 SPMTS -SHEET 2 1M [.NTOR. J c /g zAy X 6' 47 Patented July 15, 1952 TRUCK TIPPING MECHANISM' WITH INITIAL LIFT LEVER c r 7 Charles R. Golay, Cambridgeicity, 1nd Application February 13, 1948; Serial i 8,168
3 Claims. (Cl. 294-22) This invention relates to new and useful improvements in elevating or tipping hoists which are particularly, though not specifically, designed for adaption to the dumping body of a vehicle.
The primary object of this invention resides in the provision of a tipping hoist for vehicle dumping bodies which employs a hydraulic ram as the source of power for elevating the body. Economy of space is a requisite of such a hoist when it is supported beneath a dumping body by the vehicle frame, therefore it is necessary that the ram lie in a substantially horizontal plane bounded above and below by the vehicle body and frame respectively. It is, therefore, another object of this invention to provide a hydraulic ram hoist for vehicle dumping bodies which satisfies the requisite of space economy by folding compactly between the frame and body when inoperative, yet providing such a hoist apparatus which is sufficiently efficient to accomplish its desired result.
It is common knowledge that the first portion of the body tipping elevation is the most difficult to manage as it is during that portion, before the load weight is shifted beyond the point of support, that the load is the heaviest. Because of the original horizontal disposition of the hydraulic ram coupled with the extreme weight characteristic of the load to be lifted from this original position it is necessary that the hoist apparatus be of an extremely heavy and oversize construction, or a means must be provided to aid 21. smaller, low pressure ram in the primary elevation of the dumping body. It is, therefore,
- another object of the present invention to prowhich is of an extremely simple and durable construction which may be manufactured and installed at a relatively small expense.
Still further improvements and advantages of this invention will readly appear to those skilled in the art when the specification and claims are read in the light of th accompanying drawings.
In the drawings:
Fig. 1 is a perspective view of the assembled hoist.
Fig. 2 is a view in side elevation of the hoist, vihicle frame and body in a normal lowered po- 51 on.
Fig. 3is similar to Fig. 1 with the body and hoist in an intermediate elevated position.
Fig. 4 is a view similar to Fig. 3 illustrating a greater elevated position of the parts and illustrating the modified roller track.
Fig. 5 a perspective view of roller-track. 1
With reference now to the drawings accompanying this specification which illustrate the preferred embodiment of this invention, and in which like characters indicate similar parts throughout, A designates the frame, or subframe, of a vehicle which has a dumping body B supported on side sills I; The sills I are pivoted conventionally at the rear ends thereof, as at 2, to the rear end of the frame in a manner permitting the forward end of the body to be elevated above the frame aboutthe pivot 2.
A pintleA is rigidly supported transverse the frame A intermediate the length thereof. A pair of channel bars 3 are revolubly suspended from adjacent ends thereof and in opposed, spaced apart 1 relationship on the pintle 4. A pin 5 rigidly interconnects the lower, second adjacent pair of ends of the bars 3 retaining them in parallel positions. A second pair of channel bars 6 are secured one to each of the upper ends of the bars 3 to extend at-approximately a 30 degree angle from the longitudinal center line of the bars 3. These second bars '6 are rigidly interconnected at their extremities by a second pin 1 on which is centrally, revolubly supported a large metallic roller 8. Thus the combination of the centrally pivoted pairsof parallel, opposed channel bars form an elongated lever.
A hydraulic ram cylinder C provided with a reciprocating ram piston 9 is provided as the power source for the hoist apparatus. The base end ofthe cylinder is revolubly secured on the pin 5, which is supported between the lower ends of the bars 3. The outer end of the reciprocal ram piston 9 is secured in a fitting I0 which is rigidly carried, at the longitudinal center 'of an elongated tubular housing 20.
A pair of cylindrical arms- 2 I are telescopically insertedone in'each end of, the tubular housing 20, and each' of. these arms are provided with rigidly secured L-shaped plates 22 at their outer extremities.
The plates 22 are secured one to each of the spaced body sills l at such a distance rearward along the body from the pintle 4 so as to place the piston 9 in a fully retracted position in the cylinder C when the body is in its normal, lowered, horizontal position. When the body is in the described lowered position, as illustrated in Fig. 2, the cylinder C will be substantially horizontally disposed and the lower ends of the the modified channel bars 3 will be forwardly and upwardly pitched at substantially 30 degrees from the horizontal' to dispose their integral bars 6 in a horizontal position forwardly from the pintle 4.
It is the centrally pivoted lever formed by the pairs of channel 'bars'3 and 6 which'act asthe elevating booster to aid the ram in tipping the dumping body.
When fluid is admitted to the cylinder; C 7 through a flexible tubing 30, from an external.
source, the increased pressure will tend to cause an extension of the ram piston 9. However, the
weight of the body will cause, insteadfof aprojection of the piston, a rearward movement pr the cylinder of a force equal to that attempting to project the piston.
The rearward movement of the cylinder will cause a depression of the lower end of the bars 3 and a corresponding elevation of the rearwardlyextendingendsofthe bars 6. V i V 7 -As thearm's 6 continue, to rise-the roller 8; will contact a roller plate 3i, carried longitudinally beneath the body, and an upward-and rearward force will be exerted beneath the bodycausing; a
tilting elevation thereof.
Because the forward end ofthe bodyi's furtherest'. from the pivoted connetcion ofthe body "and 4 dumping vehicle itself. The placement and manner of operation of the fluid pressure supply means would becontrolled by the particular circumstances existing.
From the'foregoing description of the embodiments of this'invention it may be readily seen that a structural means'has been provided for incorporation with a straight push ram type of dumping body hoist which permits a reduction in the size and pressure requirements of the mechanism yet which increases the efficiency of the the :frame that end will be the more easily lifted, 7
thus the cylinder will continue to moverearwardly rather than extending the piston until the arms 3, are brought to vertical positions at which timev they firmly abut with abeam '32'secured transverse the frame A. y 1 l .Whenthe arms 3 abut with the beamll the bars ,6 havebeenelevated to aposition of substantially 60 degrees above the horizontal and likewise the bodyhas also been elevated to anintermediate lift position. At this time the cylinder is restricted from further rearwardmovement, and at this time the rampiston begins its projection to completethe elevation of the body,
which has been elevated sufiiciently totplace the cylinder, at an angle above the horizontal great enough to permit it to easily raise the body through its remaining tilting angle.
Naturally, the lowering of the body is a converse operation to that just described for raising the body.
The'modification set'forth in Figs. 4 and 5 is directed to a modified roller track which comprises an inverted channel bar .40 which is secured longitudinally beneath the underside of the body. This inverted channel bar 40 is secured beneath the body above the free end of the channel bars 6 in such a mannerand position; so that-the roller 8 car ied by these bars 6 will 'contact a rearwardly, angularly depending plate 4| which is rigidly secured longitudinallybeneath the channel bar 40.
transverse the channelway and from it rollonto I could be a powerdriven means carried by a tractor or other vehicle or, a manually or power operated supply means could be. mounted on the hoist inits functional operation. It may also be readily seen that the structure of the hoist apparatus comprising the embodiment of this invention is of a durable and sturdy design which may be manufactured and installed at a relatively inexpensive cost.
-With .full belief that I have contemplated all modificatio'nsi of this invention which fall within the scope ,of thelappended claims what I desire to claim in Letters-Patent is:
l.;-An elevating hoist for vehicle dumping bodies comprising, in combination, a vehicle frame,
a; dumping, body supported on the frame and pivoted thereto'transverse therear'; endithereof, a pintle supported transverse the'frame inter imediate the lengththereof, a lever composed-0F a'pair of bars: rigidlyjoined'to form an'obtuse angle" therebetw'een, said lever revolubly' supported on the pintle atthe juncture of the two bars comprisingthe same, a hydraulically operable extensible ram; one end :of said 'ram being revolubly supported onone' end of the lever, the other end of the ram being revolubly secured to the underside ofthe body rearwardly from the lever, a roller plates'upported longitudinally beneath-the dumping body vertically aligned above the lever, a roller revolublysupported by that end'of the lever remote to the ram, a'leverengaging stop "carried by the frame substantially in vertical alignment beneath the lever pivot, and means for operating the ram to extend the same. '2. A structure as defined in claim" 1 wherein,
said-lever and said ram are substantially horizontally disposed when the body is in its 10wered position, with that end'of said lever "supporting the roller being forwardly disposed rela tive to the vehicle. w
3. A structure'as defined in claim-l wherein,
the'rolle'r plate is provided withdependi'ng side edges'which-form between them a channelway for the reception of the lever carried roller, a
second plate-having an end-in the channelway, and said second plate extending downwardly and rearWardly-toward the rear of the body,-thep'a'rts operating :whereby the lever carried roller can the .second plate.
- oHnRLEs-R; GOLAY.
REFERENCES CITED The following references are of record in the file of this patentf 4 UNITED STATES PATENTS Number Name Date r 1,904,922" 3 Jung'ersen Apr. 18, 1933 2,319,840 Barrett May 25, 1943 2,437,656 Steenhoven Mar. 9, 1948 FOREIGN PATENTS Number Country Date 7 22,335 Australia of 1929