US 2481121 A
Description (OCR text may contain errors)
l 1949- w. KASTEN PRESSURE SEAL Filed March 29, 1946 Patented Sept. 6, 1949 PRESSURE SEAL Walter Kasten, Franklin, Mich., assignorto Renniks Company, Detroit, Micln, a copartnership composed of Ralph L. Skinner, Caroline '1. Skinner, Ralph L. Skinner, Jr., and Robert T.
Skinner Application March 29, 1946, Serial No. 658,005
2 Claims. (Cl. 286-26) The current invention pertains to certain novel structural advantages and new-born functional betterments in pressure-sealing means or gaskets of the round, hollow, resilient, metal, reed type wherein truncated-cone reed-means suitably mounted on one of two companion relativelymovable or reciprocatory interfitting cylindrical members bears edgewise on the round surface of the other member in order to adequately and efiectively seal the fluid-pressure present against leakage or escape.
In developing pressure-seals of this general form, it was discovered that the flexibility or elasticity of the sealing-reeds, when a plurality of such reeds were employed in nested or interfltting relation, was somewhat impaired or reduced by reason of the wearing edge-portions of the reeds being in constant contact with one another.
To overcome this difllculty, it was discovered to be desirable to employ spacers between the reeds, but it was also discommodiously or disadvantageously found that, in grinding or finishing the operative edges or the reeds, very small particles of the reeds or seals entered the spaces between the reeds, and, when the seal was placed in service, these minute particles, flecks or specks would gradually work out into the spaces between the reeds and the contact member which was being sealed causing a scoring or scratching and it is to overcome some of these defects that the present invention was discovered and developed in that the spacing otherwise made the seal function very much more eiiiciently and effectively and more positively.
To enable those acquainted with this artto understand the invention fully from all angles, a resent, preferred, physical embodiment thereof has been illustrated in detail in the accompanying drawing, forming a part of this specification and to which reference should be had in connection with the following description of its illustrations, and, for the sake of clearness and simplicity, like parts of the construction have been supplied with the same reference numerals.
In such drawing:
Figure 1 is a, section through a bearing and its cooperating piston or plunger showing the new style and type of fluid-pressure sealing-means; and
Figure 2 is an enlarged fragmentary portion of Figure l presenting the new sealing-device on a greater scale.
By reference to such drawing, it will be apparent that the inner surface of bearing 10, mounted in any suitable manner in a cylinder or housing H and which bearing containing the fluid under pressure to be sealed accommodates the round, reciprocatory piston or.plunger 12, whose movement is occasioned either by the fluid-pressure or by other means not shown, such bearing having an enlargement I3 internally screw-threaded for a portion of its length from its mouth at H, the inner end of such portion of increased diameter constituting or forming a circular, forwardly-facing, sloping shoulder 15 with an outer round portion It at a right-angle to the axis common to the piston and hearing.
The actual pressure-sealing means comprises a plurality of nested or interfitted, circular, sheetmetal, resilient or elastic reeds each having a truncated-cone, inner, operative section I! and a flat, outer, outstanding, round part 18 with thin, round, :apertured spacers I! between such latter portions 18 only, as is clearly presented in Figure 2, the construction being such that the inner active parts 11 of the reeds are either spaced from one another slightly or are in contact face-to- Iace with one another.
An externally screw-threaded, ring-shaped bearing retainer or clamping element 2! is screwed in such threaded recess of'bearing l0 and its inner end is provided with an integral extension 22 which engages and firmly holds the portions I! of the reeds and their intervening spacers I! in place against the shoulder [8.
It will be noted that such continuous, circular extension 22 is transversely in the form of an arc so that in tightening down the clamping member 2|, by any suitable wrench or other implement, a spring action is obtained in part 22 that is very desirable, particularly when elongation takes place, or the construction of the seal-housing contracts or expands due to temperature changes.
In other words, it is possible to design the shape and size of the are 22 so as to obtain the action of a very stiff spring against the reeds, the form as actually used at the present time having a bending member or spring action of approximately .005 inch at such point with a 50- ton applied pressure.
By thinning the hold-down member 2| at such region 22,- this confining or holding-down pressure can be decreased, or, by increasing the thickness at such point 22 the pressure can be aug-' mented.
Those acquainted with this art will understand that the invention is not necessarily limited to the precise and exact details set forth above and that reasonable modifications may be availed of without departure from the heart and essence of the invention and without the loss or sacrifice of any of its material benefits and advantages.
1. In a pressure-sealing means for use between a pair 01' relatively reciprocatory cylindrical members, one of said members having an annular shoulder with one surface portion thereof sloping toward the cylindrical surface of the other member at an acute angle thereto, and an adjacent annular surface portion thereof at a greater angle to the axis or said member, a plurality of thin, circular, nested, resilient reeds of a shape conforming to and bearing on said shoulder and reed pressing means pressing said reeds against said shoulder to hold them in place to act edgewise on the other member, the novel feature that said pressing-means includes an annular spring portion curved longitudinally oi the pressing means and engaging and acting as a holding spring on said reeds against said other portion of said shoulder, said annular pressing means having screw-threaded engagement with said shouldered member whereby its spring pressing action on the reeds is adjustable.
2. In a pressure sealing means for use between a pair of relatively reciprocatory coaxial cylindrical members, the outer of said reciprocatory members having an inner annular shoulder provided with a surface portion inclined inwardly towards the inner reciprocatory member at an acute angle thereto, said shoulder also being provided with another surface portion at a greater angle to the axis of said other member out of line with and meeting said inclined surface portion, a bundle of thin, circular nested, resilie'nt reeds of a shape conforming to and bearing against said portions of the shoulder, and an annular reed pressing member surrounding the said inner reciprocatory member and engaging said bundle of reeds to clamp the bundle between the reed pressing means and said other surface of the shoulder, i'ree edges of the reeds being in contact with said inner reciprocatory member, the novel feature that said pressing member has a terminal annular spring portion integral therewith and elastically yieldabie longitudinally of the pressing member, the outer end of said spring portion engaging the bundle of reeds and acting as a holding spring pressing said bundle against said other surface portion of the shoulder, said annular pressing member having a screw threaded engagement with the shouldered member wherebythe spring pressing action of said reed pressing member may be ad- .iusted.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 1,044,787 minglofl Nov. 19, 1912 1,200,966 Minning Oct. 10, 1916 1,634,891 Trout July 5, 1927 2,300,331 Avigdor Oct. 27, 1942 2,404,664 Skinner July 23, 1946 FOREIGN PATENTS Number Country Date 29,719 Great Britain Dec. 24, 1913 673,838 France 1932