US1414665A - Valve-seat retainer - Google Patents

Description

F. W. PARSONS. VALVE SEAT RETAINER.

APPLICATION FILED JAN-'19. I922.

Patented May -2, 1922.

INVENTOR fleiem'c]: WPa emi m5 ATTONEY STATES PATENT DFEFIC.

rannnurox w. reasons, or ELMI RA; NEW. vongnssrenon 'ro Incremen -BAND COMPANY, or annsnv CITY, NEW J RSEY, aconronn'rron or NEW JERSEY.

' VALVE-SEAT R TAI ER;

harness.

, T 0 all whom it may concern Be it known that I, FR DE ICK W. PAR- soNs, a citizen of the United States, and a Valve-Seat Retainer, of which the following is a specification, accompanied by drawings. ThlS. invention relates to compressors, but

more particularly to valve seat retalning de vices for retaining the valveseats and valves in position in the valve openings in the inner 7 wall of the compressor head until the covers:

and valve securing devices are adjusted on the outer wall or shell'of the compressor head. I

In a compressor head in which the valves, as for instance plate valves, are arranged radially about the longitudinalraxis of the head, difiiculty has been experienced in temporarily retaining or supporting the valve seats, carrying valves, in the valveopenings on the lower side of the head, whilethe cov ers and permanent valve seat holding de vices, usually in the form of studs passing through the covers, are being adjusted inposition and secured in place.

These valve seats and valves-lying below the plane of the horizontal axis of the machine, tend to fall outwardly -and downwardly while the covers are being adjusted, and one usual method has been to loosely secure the valves to the valve securing cover studs and adjust the valves and covers at the.

same time, but with valves of large diameter in particular, the adjustment of the valve seat and valve in its opening may not be accurate, so that leakage or other more serious troubles result. Again the workmancannot see what he is doing, since the cover obscures his view through the outer cover opening In the head, and for this reason he may not set the valve seat accurately in the inner opening.

The primary object of the present inven tion is to enable the valve seats to be accurately adjusted and temporarily retained in the valve seat openings, particularly in the underside of the inner wall of the head,

while the covers are removed, so that the workman can plainly see the ad ustment and may afterwards secure the covers and per manent valve securing devices in position without disturbing the adjustment'already made. This invention is in some respects a variation and improvement upon the valve Specification of Letters Batent,

Patented. May 2, 192,2.

Application filed January 19, 1,922.v Serial No. 530,350

seat retainer disclosed in my Patent No. 1,385,4c67 granted to me the 26th day of July 1921;.

Further obj ectsof the invention willherenafter app ear', and to all of these ends the invention consists of the combination'of elementsfully described and claimed in this specification and illustrated in one of its preferred forms in the accompanying drawings, in which Figurel is a diagrammatic longitudinalsectional elevation partly broken away through a compressor head, showing my valve seat retainer in use,

Figure 2 is a side view in perspective of the valve seat retainer, and I Figure 3 is another perspective view of the valve, seat retainer. I

Referring to the drawings. a type of com pressor head A is shown suitable for illustrating,the advantages and mode ofoperation of my, device, and I have. only chosen to show a portion of a head, iior'simplicity, it being understood however, that the invention may be, used with any type of head to which, it is found applicable. The head is adapted to be fitted to. a cylinder A having a, reciprocating piston A 1 The head' illustrated 'sprovided. with the this instance carrying plate valves, of any suitable type. The openings B,.as shown, are provided with the rabbeted or counterbored portions E, adapted to receive the gaskets E for seating the flanges F of the valve seats D. The invention applies equally to either inlet or discharge valves, and in this instance, for illustrative purposes, the upper valve is indicated as an inletvalve and the lower valve is shown as a discharge valve. The outer wall G of the head is provided withopenings H corresponding to the openings B and the usual covers J, of which only one is shown, are provided for closing the outer openings after the valve seats and valves are in place. Adjustable holdin devices, preferably in the form of studs 1 pass through each cover for securin the valve seats-in final position and cover holdin means, which may be in the form of stu s L are provided on the outer wall.

In order to temporarily maintain the valve seats D inthe openings B in the un- 110 metal, which may be carried in'anysuitable or convenient manner by the valve Structure,

and is adapted to engage the outer wallof the compressor head for'retaining the valve seat in position n-the valve seat open ng,-

until the coverand valve securing devices are adjusted. The spring retainer may beprovided with a central aperture 0 adapted to be placed over the center bolt P of the valve, after which a screw"'-*handle' is screwed over the center bolt P. The valve seat is' adjusted in position by means of the handle Q care being taken not to dislodge the gasketE, As the'valve seat is adjusted, the'hooked ends R of the valveseat retainer will slip into place and engage the edge of the outer opening 11 for the "cover, and will thus retain the valve seat in po'sition after the handle Q- is removed. The retainer L remains in position in the head and a cover J may be adjusted in position, and the stud K or valve securing device isscrewed down against the center bolt P to hold the'valve seat permanently "in position in the usual manner. p p

In order to save metal, and yet procure v a valve seatretainer having tapered; ends S,

producing increased resiliency, the strips from which the retainers are made are pref erably cut from a-sheet of metalin' such manner that the sides a and b are parallel,

and thesides ,0 andrl are parallel; Assume for instance that the side a is the original end, of a sheet of metal from which the strips were cut, it"will be observed that the side I) is out parallel to the side a, and thenin order to make the tapered ends, the sides 0 valve, the outer Wall'of the head having a I corresponding opening adapted to be closed by-a cover carrying an adjustable valve securing device, and a valve retainer in the form of a bow shaped spring clip carried by the valve structure and adapted to engage the outer Wall of the compressor head and remain in the head for retaining the valve seat in-position in the valve seat opening until the cover and valve securing device are adjusted.

2. In a compressor, a compressor head having a: valve seat opening in its inner wall adaptedto receive a valve seat-carrying a valve, the outer Wall of the head having a corresponding opening adaptedto be closed by a cover carrying an adjustable valve securing device, and a valve retainer in the form of a bow shaped spring clip having hooked ends, said spring retainer being carr'iedby the valve structure'and the hooked ends being adapted to engage the edge of the opening in the out'er wall of the com pressor head and remain in the head for retaining the valve seat in position in the valve seat. opening until the cover and valve securing device are adjusted. v

i In testimony whereof I- have signed this specification. l

- FREDERICK W. PARSONS. I

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