US1902711A - Bushing remover - Google Patents

Description

y March 21, 1933.

H, w.`Ku| P ETfAl. 1,902,711

BUSHING REMOVER I Filed NOV.. 2l, 1928 Il J \\\\w`////// I Ji" .77 wv?. 'J z I f 1 W if m `ii'afenteci Mar. 212, 1933 UNITED STATES -PATeNrorFIc HARRY W. KUIJP AND MARTIN c. nnLLINGERf'oF LANCASTER, .PENNSYLVANIA BUsHING nniuovnn i Application led November 21,` 192,8. SeriaLNiAo-.WOSSL This invention relates to bushing removers and is primarily intendedfor use in removing the valve-stem bushings of a recent popular make of automobile that has gone into practically universal use in this country recently.

In said make of automobile the valve stems have anenlarged lower end and said stems are centered in their usual guides by longitudinally split cylindrical bushings inserted in the guides from the bottom after the 'valve stems have been inserted in position, said bushings being normally held in place by the upper ends of the usual valve springs. y

Because of the foregoing construction, in order to remove the valves for replacement or for grinding etc., it is notonly necessary to free them from their respective springs, but it is also necessary to remove the bushings in order to permit the upward withdrawal of the lower ends of the respective valve-stems. Necessarily the springs `will be bodily removed, but even whenfreed of the actionof their cooperating springs the bushings `will remain in normal position in an engine that has been in use, due to the action of lheat and Vthe formation of carbon and accumulation of gummy oil or-oil residue and the like, so that said bushings must be positively thrust or pulled outof the valve guides while the 30, valve-stems are interposed between each respective pair of semi-cylindrical bushings.

The primary objects of the present invention are, to provide a simple tool for insertion through the usual engine block intake or exhaust port and fitting about and guided by the valve stem for removing or driving out said bushings; to provide a. tool of this character formed to straddle the valve whereby the thrust on the tool will be exerted in a direcition substantially parallel to the axis of said valve-stem and said bushing against the upper end of said bushing; to Vfacilitate the application of the tool tothe valve-stem; and to obtain a very simple construction economical of manufacture and adapted to large quantity production.

In this application `we show and describe only the preferred embodiment of our invention simply by way of illustration ofthe practice ofour invention as by law required.V

' straddling the valve and resting on the upper end of thebushing in operative position to `scribedbriefly merely rto aiford the proper However, we'r'ealize that our invention i capable of'other and different embodiments and that the details thereof may be modified Vin various ways, all without departing from our `said invention. Therefore, the drawing and description herein are-to be'considered as merely illustrative and Vnot as` exclusive. In the accompanying drawing:

' Figure l represents a fragmentary` sec' tional view of an engine block of the make .r 0

of automobile referred to, with the valve and its stem raised and a bushing removing tool embodying our vinvention being shown in elevation in'course offbeingapplied thereto, thevalve spring and i being removed; v

Figure 2, a view at right angles to Fig. 1, the tool being applied to the valve-stem and lower valvespring cup 65 drive the bushing out of the valve guide;`

y Figure 3, an elevation of thetool, 0nan enlarged scale; i f

Figure 4, an elevation of the tool takenv at right angles to Fig. 3; and i Figure 5, a bottom elevation of the tool.

Referring now `in detailto the drawing, A indicates the engine block having the usual intake and exhaust ports, such as port G opened and closed by cooperatingpuppetvalves, such as valve B adapted to close said port G by contact with its seat H and having a valve-stem C extending through valve-stem guide F and vcentered therein by longitudinally split cylindrical bushing E comprised of two cooperating semi-'cylindrical members, the said valvesstern having an enlargedlower-V end D to receive and support the usual lower spring cup, not shown, without need for the employment of a retaining pinor key.V`

All of the foregoing construction mentioned inthe immediately above paragraph is old and forms no Vpart of the present invention, being illustratedA generally and de# background to promote aquic'k understanding of the present invention. Y,

The tool ofthe present invention is composed `of twoprefer'ably heavy stiff resilient members Vhavingr each 'a' longarm portion 1 vto each other duringapplication to a valve stem C. Because of the'foregoing construction the material employed lfor the two members making up the tool maybe quite heavy and stiii'.

The V-shaped portions 2 will ofcourse be of such size that the distance between their opposed flattened portions or inner faces a thereofwill appreciably exceed the greatest diameter of the valve B so that when the v tool is applied in operative position to a valvestem the portions 2 of the tool will straddle the valve B, as illustrated in Figure 2.

The arms l will lie together and will preferably converge downward from the portions 2 tor their tips on a very slight angle to aid in bracing the tool 'as awhole when subjected to a blow or downwardpressure incident to driving out the bushing E. Also, said arms l will preferably be curved or bent'in cross-sec* tion with their concave faces presented t0- ward each other to approximately conform to, receive between them, and lit about, the valve stem C and to have a composite'external face of such size and shape as to pass downward into the valve-stem guide F during the driving out of thel bushing E. In other words, as applied to the'valve-stem C, all portions ofthe lower parts of the arms 1 will lie nearer to the `'valve-stem C thanatheinner 4face of the guide F, thus guarding against all possibility of injurious Contact therewith, avoiding` damage both to 'said guide F and' to the tool. To facilitate the spreading'of the arms l "during the application thereof to the valve vstem the adjacent lower end corners or portions of saidarms will preferably be beveled as at 5, the tool being inserted at an angle through the port with said beveled portions 1 5 adjacent the valve-stem'C, when a slight kshove Vwill cause said beveled portions to spread apart in riding about the cylindrical face of said stem until the lower portions of the arms l' straddle said stem, when a swinging of the tool as a whole to vertical positionV `causes the arms l to move'into parallel relation with said stem C, when they spring toward each other, embracing said stempwitlx y their opposed concave faces.

The concave or cross-sectional ycurved lconstruction of the arms not only serves to correctly position the tool on the valve stem and with relation to the bushing E and the guide lying F, but also servesto aid in bracing the'tool as a whole against longitudinal deformation and to this end the said arms will preferably be of such cross-sectional form throughout,

l spread and strad'dlejthepvalve steml when thetool is swung to vertical position, as illustrated in Fig. 2 with the lower ends of arms l-engaging the upper end of the bushing E, when a sudden downward pressure, or a light tap with a hammer, will .force out the' bushing E. The tool may then be withdrawn together with the valve and its stem and thereafter separated in obvious manner from the valve f stem, or it may be pulled'from the valve stem while the valve and its stem are held against removal, according as may be desired;

Any' suitable material may be used and of course any usual' suitable securing means,:

other than spot welding, may be employed for securing the two members of the tool together. Further, although preferable,rit is not essential that they b'e permanently or rigidly secured together s'o long 'as thereA is some provision 'for holding them relatively immovable kor substantially so `during the actual operation of removing the bushing, though of course under the'influ'ence of pressure or a blow 'one member may move endwise more than the othe'rit being borne in I mind thatthe article is not a highly tech nical or exact precision instrument, but 'a rough usage tool constructed largely by sheet metal stamping operations from the general run of sheet metal stock and 'subject tovariations in the thickness or VweightJ` of metal, in the 4degreeof resiliency, in contour or form as the press and lstamping dies may become worn etc. and alsoin relativep'o'sitions dur-l ing the ,assembly operations, all being matters incident to large quantity production operations. y A

Also, while the lower ends of the portions l of the tool are shown yand described vas in the same ,horizontal plane, thisv is not essential, althoughmost natural, usual and preferred.

Also, -while thrust on the bushingsv adirection las nearly exactly parallel tothe axis of the valve stemy as is obtainable is desirable, this is not an essential, such thrust need not be exactly parallelto such axis, nor need 1t closely approach parallelism tosuch axis, but i't'will be sufficientsimply` if the tool applies a "pressurejthrush or blowto the ias upper ends of the bushing members resulting in their being displaced downward from their normal position in their cooperating guides F.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent is:

l. A bushing removing tool comprising two members having their upper end portions secured to ether, :free arms adapted to cooperate in tting about an interposed part and adapted to engage the opposed end face of a bushing while said interposed part extends in said bushing, and formed intermediate said upper end portions and said arms with portions outwardly bent away from each other whereby said members may straddle an element of greater diameter than, and carried by, said interposed part and exert pressure on said opposed end face of said bushing.

2. A poppet-valve bushing remover comprising two members having opposed upper portions, opposed arms and oppositely outwardly bent intermediate portions, said upper portions being maintained in operative relation, said intermediate portions being adapted to straddle the valve on the upper end of a'valve stem, and said arms being adapted to embrace the valve stem and engage the upper end of said bushing.

3. A poppet-valve bushing remover comprising two members having opposed upper portions, opposed arms and oppositely outwardly bent intermediate portions, said upper portions being secured together, said intermediate portions being j adapted to straddle the valve on the upper end of a valve stem, and said arms being adapted to embrace the valve stem and engage theupper end of said bushing.

4. A poppet-valve bushing remover comprising two members having opposed upper portions, opposed arms and oppositely outwardly bent intermediate portions, said upper portions being rigidly secured together against relative movement, said intermediate portions being adapted to straddle the valve on the upper end of a valve stem, said arms being adapted to embrace the valve stem and engage the upper end of said bushing, and each of said members as a whole being stil' and slightly resilient, said resiliency normall ly forcing said arms into contact with each other and permitting their spreading movement to receive the valve-stem between them.

5. A poppet-valve bushing remover comprising two members having opposed upper portions, opposed arms'curved in cross-section with their concave faces opposed to each other, and oppositely outwardly bent intermediate portions, said upper portions being connected together, said intermediate portions being adapted to straddle the valve on the upper end of a valve stem, and said arms being adapted to embrace the valve stem and engage the upper end o said bushing.

6. A poppet-valve bushing remover tool having arms lconnected at their upper'portions, said arms being formed with oppositely outwardly bent portions adapted to straddle the valve on the upper end of a valve stem and having portions depending from said outwardly bent portions respectively and adapted to receive between them the valve stem and to engage the upper end of the bushing.

7. A poppet-valve bushing remover tool having arms connected at their upper portions, said arms being formed with oppositely outwardly bent portions adapted to straddle the valve on the upper end of a valve stem and having portions depending from said outwardly bent portions respectively and adapted to receive between them the valve stem and to engage the upper end of the bushing, the adjacent side edges of said depending portions being beveled downward away from each other to the extreme lower ends of said portions.4

8. A poppet-valve bushing remover tool having arms connected at their upper portions, said arms being formed with oppositely outward bent portions adapted to straddle the valve on the upper end oi a valve stem and having portions depending from said outwardly bent portions respectively 'and adapted to receive between them the valve stem and to engage the upper end of the bushing, the adjacent side edges of said depending portions being beveled downward away from each other to the extreme lower ends of said portions, and the lower parts of said depending portions being formed with opposed inner concave faces to cooperate with each other in embracing and centering the valve stem between them.

9. A bushing 4remover comprising a single member including a driving portion, a valve hood, and a valve stem shank having .a long channel for receiving the valve shank to permit the driving of 'a bushing out of an engine block with the'valve protected in said hood.

10. Means for removing valve guides comprising a longitudinally grooved stem adapted to embrace a valve stem and provided with a valve receiving recess.

1l. Means for removing valve guides comprising a longitudinally grooved stem adapted to embrace a valve stem and provided with a valve hood, said grooved stem being slightly less in diameter than the valve guide `to be removed.

In testimony whereof we have signed our names to this specification at Lancaster, Pennsylvania, this 20th day of November,

HARRY W. KULP. MARTIN C. DELLINGER.

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