US1042094A

US1042094A - Automatic valve mechanism for bumping-machines.

Info

Publication number: US1042094A
Application number: US51525509A
Authority: US
Inventors: Henry L Demmler
Original assignee: Individual
Current assignee: Individual
Priority date: 1909-08-30
Filing date: 1909-08-30
Publication date: 1912-10-22
Anticipated expiration: 1929-10-22

Description

H. L. DEMMLBR.

AUTOMATIC VALVE MECHANISM FOR BUMPING MACHINES.

APPLICATION FILED AUG. 30, 1909.

1,942,09 L. Patented 0011.22, 1912;

satanic onnion.

f. HENRY L. DEIY'II II JEB, 0F KEVJANEE, ILLINOIS.

AUTOMATIC VALVE MEbHANlST-d FOE BUMPING-IYIACHINES.

Application filed August 35), 18 9.

To all aphom'it may concern:

Be ii known that I, HENRY L. DEMIMLER, a. citiz of the United States. residing at Kewanee; in the county of Henry and State of Illinois, have invented a new and useful Automatic Valve Mechanism for Bumping- Machiiies.

My invention has for its object to provide an improvement in bumping machines of the class used'in molding operations. for imparting a series of reciprocating strokes or impulses to the flask to pack the sand around the pattern. The invention particularly refers to the fluid controlling valve mechanism for such machine or similar reciprocating apparatus, and to the incorporated'structure, whereby a fluid pressure is utilized to impart an upward stroke to the bumpingor vibrating element. and gravity is utilized for accomplishing the return or downward stroke, in connection with positive lowering of the exhaust valve by fluid pressure.

One form of the apparatus is illustrated in the accompanying drawings in which- Figure 1 is a vertical sectional view through .t.he valve and the superimposed bumping element, showing the parts in normal position. Fig. 2 is a similar viewshowing the bumper raised. Fig. 3 is a horizontal sectional view. indicated by the line III. III. of 1. Fig. is a similar view on the line- IV. IV. of Fig. 1.

Mounted upon any suitable support as the base of the bumping; machine, not shown, is a main pedestal A comprising a. valve casing for the op rative fluid controlling valve mechanism. having at its upper portion an exteud d head M oi' reduced diameter extending above an annular abutment or shoulder R, and having packing rings N.

Slidingly mounted on the pressure head M isthereciprocating head or bumper E, suitably'chan'ibcred in its interior to fit over the head H and providing, when seated. on the annular abutment It, aspace F between the upper end of the hchd M and the inner upper end of its cavity. The dash is to be upon the top of bumper F.

Arranged centrally oi" base A and its head M is a primary valve chamber B having a valve seat 7) and a secondary or upper chamber D connected by a circulating port G Specification of Letters Patent.

Patented Oct. 22, 1912. Serial No. 515,255.

above valve seat 7). Constant fluid pressure is supplied to primary chamber B by a port. ll connected with any suitable source of pressure.

A piston Q is rcciprocably mounted in the lower portion of chamber and is provided with suitable packing rings N. Mounted.

in. the upper chamber 1) is a valve K adapted to seat on valve seat G controlling circulation to the exhaust port L and provided lengthwise of its exterior body portion with a series of fluid circulation grooves P.

A cushion spring 0 is located in the sccoudary chamber D, seated on the bottom thereof and bearing underneath the bottom of valve K. tending to hold it to its seat, as in Figs. 1 and Extending downwardly from exhaust valve K is a central stem I to which is secured the piston Q by any suitable means, as a pin 9. so as to positively lower the exhaust valve K from its seat by fluid pressure acting on the upper side of piston Q, when the bumper E is raised, as in Fig. 2.

For the purpose of controlling the flow of fluid pressure through port C to chamber D and through groovesPto space F, to shut oii" the flow when the bumper is raised, and to open circulation through said ports when it is lowered, a valve J is slidingly mounted on stem I of the exhaust valve K. Said valve provided with an upwardly extending sleeve j adapted to be engaged by the bottom of exhaust valve K on downward travel of the bumper whereby to unseat valve J and allow of circulation being renewed through port C to again raise the bumper,

Spring 0 is of suflicient strength to hold exhaust valve K to its seat when the bumper raised to almost the limit of its travel, as in Fig. 2, and'to partly resist thedownward action of piston Q to allow said piston to quickly unseat valve K, when the bumper is clear up, but not to lower it suiliciently to strike the top oi sleeve j prematurely. This latter operation is not intended to occur until, the fluid in space F having exhausted through ports L, the bumper falls by gravity, pressing valve K down with it, and ans-eating valve J for the next lifting operation.

- It will be observed that the area of haust valve K is greater than that of piston exhaust valve, K, thereby slig tly The action of the device will he suddenly arrested in of valve J, tly beyond ening fin its clear from the foregoing description. In its normal lowered position, exhaust port L is closed and valve J is depressed, opening pressure circulation to s ace F, whereby the bum er is raised to the imit ofits movement. is action raises piston Q and likewise valve J, closing the port C as in Fig. 2. Thereupon ressure through ll acts on piston Q an by its connection with stem I, exhaust valve K isguickly and slightly lowered from its seat, against ressnre of s rin 0, allowing exhaust, wiiereupon the lien. E falls to its seat Q, but piston K being its upward movement by seatin the head E tends to raise sli the exha and assisting the valve lowering. Lion.

0 on annular abutment R, closing, exhaust L 1 mary chamber,

on its way down by bringin seat G against valve K. This operation will continue alternately as ion as ressurc is admitted, and at a speed dependent on the pressure or amount of sup ly.

It will be understood that the proportions, arrangement and desi of the device may be changed-or varie by the skilled j chanic, and I do not desire to be limited i the exact construction as shown and described but to include all such changes as within the scope of the following claims.

What I claim is:

1. In a reciprocatin device, a casing having a primary cham r and an auxiliary chamber, a valve-seated port connecting said chambers, a supply ort for said pnahead s idingly en ging rovided with a suita le exhaust port, ava ve in said prima chamber for controlling said valve-seat port, a ,valve in said auxiliary chamber for controlsaid' casing and ling said exhaust port, and fluid actuated means for operating said valves.

2. In a reciproca 1 device, a casing hav ing a prima cham r aind an auxiliary chamber, a va ve-seated port'connecting said chambers! a sup ly port fipr said primary chamber, a hen slidingly eiiga 'ng said casing and provided with a. suitabe exhaust port, a valve in said primary chamber for controlling said valve-seate port, a valve in said auxiliary chamber for controlling said exhaust port, fluid actuated means for operating 881d valves, and means for checking said exhaust valve on its return stroke.

3. In a reciprocating device, acasing having a primary chamber and an auxiliary chamber,-a valve-seated port connecting saidchambers, a supply port for said primary chamber, a vertically reciprocable head slidingly engaging said casing and provided with a suitable exhaust port, a

valve in said primary chamber for control- 6 ling said valve-seated port, a valve in said said slidingly enga provided witha reciprocable head having. a. valve controlled exhaust port, a cerrtra ly arranged valve and piston chamber, a secauxiliary chamber for controlling said oxhaust port, fluid ac uated means for operating said valves, and means for arrest' its downward travtfi.

4. In a reciprocatin device, a having a primary chamier and an aunli chamber, a valve-seated port connecting sai chambers, a supply port for said pnma chamber, a vertically reciprocable head sli ingly engaging said casing and provided with a suitable exhaust port, a valve in said primary chamber for controlling said valve-.

ing head at the limit 0 exhaust port respectively, substantially as iact forth.

6. .The combination with a stationary base provided with a reciprocable head havin a valve controlled exhaust port,; of a va ve ccntrollin said port adapted to reciprocate with said cad, a cushioning spring therefor, and valve and piswn' mechanism in st operable to admit pressure to said head and to open said exhaust port respectively, substantially as set forth.

7. The combination with a stati provided with a reciprocable head," aving a valve controlled exhaust port, a'centrally ar-' ranged valve and piston chamber, a secondany exhaus, valve chamber. and a communi-- eating valv'e seated port; of an exhaust valve in said secondary chamber havhg a downwardly extending stem, a piston secured thereto, and a valve slidingly mounted on said stem between the exhaust valve and piston and operable to open and close said communicating port, substantially as set forth,

8. The combination with a stationary base ondary exhaust valve chamber, and a communicating valve seated port; of an exhaust valve in'said secondary chamber having a downwardly extending stem, a piston secured thereto, and a valve slidingly mounted on said stein between the exhaust valve and piston having an extended sleeve adapted to contact with the exhaust valve,substantially as set forth.

9. The combination with a stationary base provided with a reciprocable head having a i no nee-spec valve controlled exhaust port, a centrally an ary exhaust valve chamber. and a communieating valve sealed port; of an exhaust valve in said secondzii'y cl amber having a down wardly extending'stem, a cushion spring therefor, a piston secured thereto, and a valve slidingly' m'ouhted on said stem between the exhaust valve and piston and operable to open and close said communicatingport, substantially as set forth.

10. In a reciprocable bumping machine, the combination of a cylinder and a piston, a valve casing, an exhaust valve adapted to be locked in sealed position by fluid pressure in said cylinder, an independent inlet controlling valve, and means for controlling said inlet valve 11. In a reciprocating device, a casing having a primary chir mber and an auxiliary chamber, a eontract d opening connecting said chambers, a supply port for said primary chan'iber, a head slidingly engaging said casing and provided with an exhaust port, a. valve insaid uxiliary chamber for cont-rollinq skid exhaust port, and fluid actuated means in saidlprimary chamber for actuating said exhaust valve.

12. In a reciprocating device, a casing having a primary chalnber and an auxiliary chamber, a supply pbrt for said primary chamber, a slidingly engaging head for said auxiliary chamber, a :suitable exhaust port for said auxiliary chamber, an inlet valve in said prima y chamber, and means for ex haurting fluid pressure from said auxiliary chamber. I l

13. In a reciprocating device, a casing having a primary cha mber communicating with an auxiliary chal nbcr, a supply port for said primary chamber. a head slidingly engaging said casing. a suitable valve-seated exhaust port t'or saidpumiliary chamber, a valve in said am" iary chamber adapted to be sealed by lluid'prissurc insaid auxiliary chamber. and lluid aclil alcd means for sewaling said exhaust valvtal- 14. In a recipl'ocatilngr device, :1 (using having a slidingly engaging: head, means for supplying tlui d pre sure lo said casing, a suitable exhaust purl for said casino. 1. valve in said casing for controlling said cxhaust port, and fluid actuated means l'or operating said exhaust valve.

15. In a reciprmratin c device. a casino; having a slidingly{engaging head. ineam: l'or supplying lluid pressiue to said casino, :1

in said 'asing for c nlrolling said exhaust port, lluid actuated means for actuating-aid exhaust valve, and m'elins l'or Hll])1)(lllll1,,l'

"said slidingrly engaging head at the lower terminal of its stroke. 1

lli. In a reciprocating device, a casing; having a shdingly engaging head and provided pith a-suitable exhaust port, means for supplying fluid pressure to said casing, a' valve in said casing for controlling said exhaust port, lluid actuated means for actuatine said exhaust valve, and an anvilto 7 support said slidingly engaging head on its return stroke.

17. In a reciprocating: device, a casing having a slidingly engaging; lead, means for supplying fluid pressure to said casmg, a suitable exhaust port in said casing, an exhaust valve adapted to be locked in sealed position by fluid pressure, and means for

l

1, 1 operating said exhaust valve. i

18. in a reciprocating device, a casing 30 having a slidingly engaging head, means "for supplying lluid pressure to said casing,

a suitable exhaust port for said casing, an exhaust valve adapted to be locked in sealed position by fluid pressure, means for operat- 35 ing, said exhaust valve, and means for suppfil'l'lllg said slidingly engaging head at the terminal of its return stroke.

it). in a reciprocating device, a casing having a primary chan'iber communicating with an auxiliary chamber, a supply port for said primary chamber, a slidingly en; gaging head for said casing, a suitable ex-fg haust port for said auxiliary chamber, an, exhaust. valve adapted to be locked in sealed position by fluid pressure in said auxiliary chamber, and means for actuating said ex-- haust valve.

20. In a reciprmaling device, a casing having a primary chamber and all auxiliaryv chamber, a supply port for said primary rhambcr, a slidingly engaging head for said auxiliary chamber, a. suitable exhaust port tor said auxiliary chamber, an inlet controlling: valve in said primary; chamber, l05 means for exhausting lluid pressure from said auxiliary chamber, and meaus for supporling said slidingly engaging head at the terminal of its return stroke. l,

".t'flln a reciprocating device, a 'asing llll In, Inn :1 primary chamber and an auxiliary chamber. a supply port for said primarychamber. a slidiugrly engaging: head for said auxiliary chamber. a suitable exhaust port for said auxiliary chamber, an inlet conlrolline' valve in said primary chainber. and fluid actuated means 'l'ui' exhausting lluid pressure from said auxiliary chamber.

M chamber. a slidingrly engaging head for said suitable exhaust purl tolsaid casing, a valve for auxiliary chamber, a suitable exhaust port 1 said auxiliary chamber, an inlet. conl trolling valve in said primary chamber, l'luid actuated means for exhausting fluid l pressure from said auxiliary chamber, and means for supporting said slidingly engag leg: head at the terminal of itsreturn stroke. 1

23. in a reciprocating device, the combination of a cylinder and a piston, 11 valve nameto this specification in the presence of casing, an exhaust valveb adiapged to be two subscribing witnesses.

100 e in sealed position y ui pressure 4- in said cylinder, an independent inlet con HENRY D i trolling valve and fluid actuated means for v Witnesses1 actuating said va1ves.- i LEONARD D. Qnnm,

In testimony whereof I have signed my Lns'mnJ. LOWE.