US1946613A - Spring reaction neutralizer - Google Patents

Description

R. M. CROSS SPRING REACTION NEUTRALIZER Feb. 113, 1934.

Filed July 7, 1928 2 Sheets-Sheet l A. 4 #0 M m 5 W .3 8 W 5 H B W a 0 W 4 /m 4 H a 4 M: w 4 7 MIL F 9 zwi/fl/ 8 m w m e H w 9 m w x INVENTOR HUBER/g3 M CROSS ATTORNEY Feb, 13, 1934., R. M. CROSS SPRING REACTION NEUTRALIZER iled July 7, 1928 2 Sheets-Sheet 2 IN VEN TOR M. CROSS m mi 4: A TTORNE Y Patented Feb. 13, 1934 7 UNITED" ATESP'iRATENT.JIOFHCEE.

SPRING REACTION NEUTRALIZER 1 Roderio=;- M;:':Cr0SS', Minneapolis, Minn; asslgnor: iii? to GrosvenonM; Gross, Newton-CenterJMass;

Application'xlul'y 7, E1928. Serial No: 2913016 9 Claims; (-Gl'.:-;126718)1t2s This invention relates to .-new-:-and.useful im-mdrawings and will be pointed out in: the annexed provements in'spring reactionmeutralizers,sand claims. r a more particularly1-to.-such=edevices .of the-type- Inthe accompanying. drawings-there has-been 1 adapted for use in connection with-motor vehicle disclosedra structure designed :to carry outthe springs. -1 various 'objectsof the invention, but it isto be -'60= An object ofigthe present; inventionis: to prounderstood that the invention is not confined tovide a spring reaction-neutralizer comprisinganthe exact ieaturesshown as various changesmayv member adapted to be securedsetmthe -vehicle :beimade within the scopeof the claims which chassis,'and. acasing;mountedforrelativeorotary ifollow. movement upon said chassis-and connected iWith"? -lnthe accompanyingdrawings forming part of 65 the vehicle axleinaflmannerto :cause;thecas-.: ,th.is specificatiomri a. 7

ing to be relatively rotateduponthemember; uFigure tlz iswa' view illustrating a portion; of a. when the-vehicle spring on-springs-flex hecause, -motr vehicle with-the invention'applied thereto; of irregularities-inrtheroad-way andrmeans be-ts Figure 2xis-ranenlarged sectional-view? on the r ing provided in connection with saimmemberandline,22. of Figure 4,cshowing the partsin normal, .70 casing permitting: freedom of: movement of. the position; 1:;

casing in. either directionzfrom-a normalgpositiorr, Figure 3 isa similar view, showing ,a--position;-- but resistingfthe return movement of .the casing; assumed; .by;:the' parts; when the vehicle wheel: 1/ such resistanceacting to oppose :ori;,neutralize-sstrikes abump in the:roadway;

that force'ofreactionwwhich the differences,- Figure 4 a sectional vplan-view on the line.75 between ther-weight resting upon the spring and Afiiof Figure 2 ;-,and

the total" force stored with-in the-spring c Figure :.isa. verticalsectional viewon the line w;

A further-object ofithe inventionis to,provide;. 5: gure 2, S w the'DiStOn in leva onj a spring reaction neutralizercomprising-ameni- I.n. the selected embodiment-of the invention i:.::i

ber adaptedtozbe securedrtothe vehicle ohassis,-,- here shown, there is illustratedfor purp ses of so and a casing mountedion-relativenmovement --.Qi ,010 motor Vehicle p upon said memberlzanda:cooperating therewithr; ingfthe'chessis side beam 2911(3- front e 3, 0011s to provide :a. "fluid-might ;,chamber; saidrcasing wne ie W e chassis'by means of ai-splmg having a'iconnection with the vehicle axle1sotha't' shown as beingiof the Semi-Elliptic ype I when the axle' is moved relativertosthe chassis, The invention-comprises m r 5 having a the casing will'partiallyxrotate uponthe zmem== Wlullfldricaleoff'set'portion 6, adapted to be Secured 1 her, a cylinder: piston smtablesvvalve toasupport-such as-the side beam 2 of theivehicle mechanisms within the-above mentionedmem Phasisisi means of Suitable 130117575 as-shown ber adapted: to control fiuid circulation inzthe i Figure 5- lTheimemher 5 has a annular flange chamber said parts beingarranged' to permit 'F n 1S cyhnqrlcel and mat freedomof movement of the casing upon the fi q tomtatably'reflcewe Open (at member; when the vehicle spring is flexed in rlone-lslde andr'threaded at receive coYerr either direction -f-rom"normal,' but resisting the PI-aite lz'mha'vmg central bore adapted return movement of the spring t normal, thef portions'of'the member 5*The'pack resisting forces neutralizing the reactiveforces has an artnular reces? adapted t 163F995 stored in the vehicle spring when flexed. Genie sfmtablekpackmg retamed: theyemrby" The particular object of: the invention-,the'regg' f j g fgggg V fore, 1s torpiovide an improved spiing IBaCtIOII" abbve described, define a fiuid tight chamber 24 neutralizer, "more particularlyadapted for use t i in connectionzwith' vehicle springs;ato neutralize-?iggfg ghg f an melastlc (See Flg the reactive forces stored therein when flexed in' :ACYlinder having lugs 16 thereon is either direction from normal. .7 The present inwithin h 'casmg 9 and securedihereto v 1 is an f Over F Structure means ofcsuitablebolts as shown in Figures 2, 3, Shown Pendmg apphcatlmfi Senal 233;? l and 4. The upper end of the cylinder 15 is threadfiled November 171 9 Patent 1,797, cc. to receive a flangedcap 17 having an air vent March 1931, (1853011113 pp nby the ISWtherein to permit escape of the entrapped air. I inventor. hereof and GrosvenorvM. Crossr 1 i A h ll p1unger 1-9-j mQVab1y mounted Within Other objects oftheinvention willappear from-. .thecy1inder;15 and has a head 21 provided at its 1 the following. description andnaccompanying 'rlOWBI' end, adapted-toride upona cam surface 22, preferably integrally formed with the annular flange 8 of the member 5, as shown in Figures 2 and 3. Inclined intake apertures 23 are provided in the head 21 and establish communication between the fluid chamber 24 and the interior of the plunger 19.

An intake valve 25 is mounted in a valve seat member 26, provided at the lower end ofthe plunger 19 adjacent to the apertures'23. The member 26 has a guide adapted to receive the valve stem 2'7. A compression spring 28 has one end seated against the valve seat member 26 and its opposite end against a pin 29, mounted in the lower end of the valve stem 2'7. This spring normally retains the valve 25 in closed position'a's shown in Figure 2. The valve seatinember 26'is also provided with fluid-circulating passages 31, shown in dotted lines in Figures 2 and 3."

The plunger head 21 is provided with projections 20 received in notches 30 provided in the lower edge of the cylinderwall 15. These projections and notches co-operate to prevent relative rotation of the plunger with respect to the cylinder. The plunger head 21 is forcibly held in contact with the cam surface 22 by means of a compression spring '40, mounted within the plunger and having one end seated against the cap 17 and its'opposite end against a-spacing member 50 engaged with the valve seat member 26. "The spacing member 59 has a central opening permitting fluid flow therethrough.

Means are provided for controllingthe circulation of 'fluid through'the hollow plunger 19 and cylinder 15, when the neutralizes is actuated by relative mo'vement of the vehicle axle,with respect to the chassis 2. Such means is shown in Figures 2, 3, and 4, and comprises a valve seat member 32 having a threaded extension 33 received in a threaded socket 34, provided at the upper end of the cylinder 15, as shown in Figure 2. The extension 33 has a bore 35 establishing communication between theinterior of thecylinder and a bore 36, provided in the member '32. A fluid control valve 37, having a stem 38 is movably mounted inthe member 32'and is normally retained in valve-closing position by means of a compression spring 39, having one'end seated against the valve head 37 and its upper end against the bottom of asocket 41, provided in an adjusting screw 42 mounted in the upright wall of the casing 9. (See Figure 4.) A look nut 43 is received in threaded engagement with the adjusting nut 42 and provides means for locking the latter in adjusted positions in the wall of the casing 9. The tension of the spring 39 controls the discharge of fluid from the cylinder 15 and shown in Figure 2. The casing 9 has an arm 44 on one side thereof provided with a suitable ball 45 to which one'end of a connecting rod 46 is connected, the opposite end of which is similarly connected to the vehicle axle 3, as shown in Figure 1.

The valve stem 38 of the valve 37 has a reduced portion 4'7, thus providing an annular shoulder 48, the effective area of which is relatively less than the effective area of the valve head 37, 'as shown in Figure 4. Thus, when the pressure fluid is forced into the bore 36, it will act against the shoulder 48, thus partially balancing the valve 37. The valve, however, will open against the tension of the spring 39 because of the increased effective ar'ea of the bottom of the valve head 37.

The casing 9 is provided at its upper end with a filler pipe 49 and plug 51, through which a suitable fluid may be introduced into the chamber 24. A drain plug 52 is provided at the bottom of the casing, through which the fluid may be drained from the chamber.

In the operation of this novel spring reaction neutralizer, the parts will normally be positioned as shownin Figure 2, with the valves 25 and 37 in closed position. When the vehicle wheel 53 encounters a bump in the road way, the axle 3 will be moved upwardly relative to the chassis frame 2, therebyrelatively rotating the casing 9 upon the member 5, because of its connection with the axle by means of the connection 46. Such -movement of' the casing 9 upon the member 5, will cause the cylinder and piston to partially rotate within the chamber 24, as a result of these parts being connected with the casing 9, as previously described.

During such movement of the cylinder and plunger, the latter will be forced downwardly within the cylinder by the'action of the spring 49.

thereby causing the intake valve 25 to open against the tension of the spring 28, and permitting additional fluid to enter the plunger and cylinder, as indicated by the arrows in Figure 3.

Return movement of the vehicle spring 4 from an abnormal or flexed position,-to its normal position, will be resisted by the action of the control valve 37, which tends to remain in closed posi tion because of the spring 39 acting thereagainst. The valve 37 therefore tends to prevent the discharge of fluid from the cylinder, but, as the vehicle spring 4 returnsto normal position, the

plunger head 21 will be moved upwardly, because 'of its engagement with the cam surface 22, re- 1 sulting in the intake valve 25' closing and the conment of the adjusting screw 42 will control the action of the valve 37, and provides means for varying the resistive forces acting to prevent the casing 9 to return from the-position shown in Figure 3, to its normal position, shown in Figure 2, sothat such forces-may be adjusted to substan-.

tially neutralize the reactive forces stored in the vehicle spring whenin'a position other than normal. Conversely,'when the vehicle wheel drops into a depression in the road surface, the casing 9 will be rotated in the opposite direction from normal, causing the plunger head to engage the cam surface upon the opposite side of the vertical. The return to normal position of the casing 9, and therefore the vehicle axle 3, will be controlled by the action of the control valve 37 in 'a manner similar to that above described with reference to Figure 3.

The novel spring reaction neutralizer featured in this invention comprises few parts and is comparatively lightin weight. The large surface between the annular flange of the casing 9 and the annular flange 8 of the member 5, provides a large bearing area or surface which is thoroughly lubricated because of suitable grooves 54 provided in the annular flange 8 of the member 5, and further, because of the chamber 24 being substantially filled with a suitable non-elastic lubricating fluid. The relatively small area of the mounting surface and general shape of the neutralizer, also eliminates much interference and diftlculty in mounting. It will also be noted that no roller 01' ball bearings are used in the construcacr mi 3 tion thereof thereby greatly reducing, the embertuapeew be secured to a vehicle chassis, 1

w balanced control Valve adjustment nection with the-vehic e 2x16 and coop rating wit of the device and-also'permits the use oflightei "the memb'er twdefine' an oil tight chamber} an 1 parts. It-will also be noted--tha't the' device' p'ro'"ih'elastic fluid in said chamber, acylinder secured manufacturef "Thenovel-design oft'he' partially "a ba'singo'n said member'havinganoperative con vides its own-oil'chamben 'no auxiliary oilr'eser voirs being-necessar an. s

I claim y inventiont member adapted to- *be secured tO a vehicle chassis,-a-* casing mounted on said member-=*an"' L having 'anarm adapted to'be-=connected*to the ve hicle axlejsaidmember andcasing cooperating-todefine an oiltight chamber, =an 'in'elastic fluid -inthe chamber',-acylindersecured to'tlfe casing within said chamber, aspring-actuated fluid eontrol valve at on'e end 'of the cylinderfia hollow plunger movable in the cylinder-"and havirfg an intake valve-at oneend thereof, and means for actuating said plunger, when said casing is relatively rotated upon the member, said valves controlling the flow of fluid through said cylinder and plunger in a manner to permit freedom of movement of the casing in either direction from normal, but resisting return movement of the casing.

2. A spring reaction neutralizer comprising a member adapted to be secured to a vehicle chassis,

a casing mounted on said member and having an armadapted to be connected to the vehicle axle,

said member and casing cooperating to define an oil tight chamber, an inelastic fluid in the chamber, a cylinder secured to the casing within said chamber, a spring-actuated control valve at the upper end of the cylinder, a hollow plunger movable in the cylinder and having an intake valve at its lower end, a cam adapted to actuate said plunger when said casing is relatively rotated upon the member, one of said valves permitting unrestricted flow of fluid into said cylinder and plunger, when the casing is rotated in either direction from normal, and the other valve tending to prevent discharge of fluid from said cylinder and plunger to resist return movement of the casing to normal.

3. A spring reaction neutralizer comprising a member having means for securing it to a vehicle chassis, an annular flange on said member, a casing rotatably mounted upon said member and having an arm adapted for connection with the vehicle axle whereby relative movement of the axle will relatively rotate said casing, a fluid chamber defined by said member and easing, an

inelastic fluid therein, a cylinder mounted upon said casing within the chamber and having a partially balanced spring-actuated discharge valve at the upper end thereof, a hollow plunger within the cylinder having a head at one end thereof, an intake valve in the plunger adjacent to said head, a cam on said member, a spring constantly holding said plunger head against said cam, said spring causing the plunger to be moved downwardly when said casing is moved in either direction from normal, whereby said intake valve is opened to permit fluid to flow from the chamber into said plunger, return movement of the casing being resisted by the action of said cylinder discharge valve which constantly tends to prevent discharge of fluid from the cylinder as the casing is returned to normal position, such resistive forces" substantially neutralizing the reactive ferces storedin the vehicle spring with which the device isassociated, when the vehicle spring is in abnormal position.

4. K spring reaction neutralizer comprising a -"to*the casing within thechamber a spring -actuer movable-in the cylinderand having 'anintake 1. A spring reaction-*neutralizer cdmprising a valve, a' c'am adapted to "actuate -s'aid-=plunger when saidcasing is-'relatively'rotated' upon the memben-one of said valvespermitting unrestrict ed flow of fluid into -said' cylinder and plunger, I when the casing is' rotated' in either direction from normalfand-the other valve tending to' pre I vent discharge of E fluid *from said-' cylinder and plunger-to resist'return movement of the casing 4S spring, a casing rotatably mounted on said member and having means for connecting it with the vehicle axle whereby relative movement of the axle will relatively rotate said casing, a fluid chamber defined by said member and easing, an inelastic fluid therein, a cylinder mounted on the casing and having a partially balanced springactuated discharge valve, a hollow plunger within the cylinder having a head at one end thereof, an

intake valve in the plunger adjacent to said head,

a cam on said member, means constantly holding to normal position, such resistive forces substantially neutralizing the reactive forces stored in the vehicle spring when said vehicle spring is in abnormal position.

6. A spring reaction neutralizer comprising a casing having a chamber adapted to contain an inelastic fluid, a cylinder movably mounted with A said casing, a spring-actuated control valve at one end of the cylinder, a hollow plunger movable in the cylinder and having an intake valve, a cam adapted to actuate said plunger when said cylinder is relatively moved with the casing, one of said valves permitting unrestricted flow of fluid into said cylinder and plunger, when the casing is moved in either direction from normal, and

the other valve tending to prevent discharge of fluid from said cylinder and plunger to resist return movement of the cylinder to normal.

'7. A spring reaction neutralizer comprising a casing having a chamber therein adapted to contain an inelastic fluid, a cylinder mounted for movement with said casing, a partially balanced spring-actuated discharge valve at one end of the cylinder, a hollow plunger within the cylinder provided with a head, an intake valve in the plunger adjacent to said head, a cam within .i

the casing, a spring constantly holding said plunger head against said cam, said spring causing the plunger tobe moved in one direction when said casing is moved in either direction from normal, whereby said intake valve is opened to permit fluid to flow from the chamber into said plunger,.return movement of the casing to normal being resisted by the action of said cylinder discharge valve which constantly tends to prevent discharge of fluid from the cylinder as Si A spring reaction neutralizer comprising a memberhaving 'means for 'securing i-t to -a Vehicle ago the casing is returned to normal position, such resistive forces substantially neutralizing the reactive forces stored in the vehicle spring with which the device is associated, when said vehicle spring is in abnormal position.

8. A shock absorber for controlling the movement between relatively movable parts comprising a fluid-containing chamber arranged to be mounted upon one of said parts, a rotatable unit operatively disposed Within said chamber, said unit including a hollow sleeve having inlet and outlet ports and a check valve operative associated with the inlet port, an operating arm secured to said rotatable unit and having the free end thereof connected to the other of said relatively movable parts, and means for causing the fluid in said chamber to be drawn into the interior of said hollow sleeve upon movement of said operating arm in one direction, said check valve beupon oscillation of said cylinder in one direction, and means for forcing said fluid out of said cylinder and into said chamber by way of said constricted opening, said last mentioned means being operable upon sudden oscillation of said cylinder in the opposite direction.

RODERIC M. CROSS.

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