Cylinder cover for alternative compressor

Abstract

A cylinder cover comprises a block (1) provided with at least a sealing contour (11) and at least a support projection (3) for supporting a discharge valve stop. The support projection (3) is spaced from the sealing contour (11) through at least one gap (4).

Claims

1. A cylinder cover for a compressor, comprising: a block provided with a sealing contour; at least one support extension defined in the sealing contour; at least one support projection with at least a portion of the at least one support projection spaced from all sides of an inner perimeter of the sealing contour through at least one gap, wherein the at least one support projection is vertically parallel to at least a portion of the inner perimeter of the sealing contour; the at least one support projection extending from a lower plate of the block; the at least one support projection supporting a valve stopper; the at least one support projection possessing mechanical resilience; wherein the at least one support projection, during maximum mechanical deformation of the at least one support projection, remains spaced from the sealing contour through the at least one gap; wherein the at least one support projection is contained between one side of the inner perimeter of the sealing contour and the at least one support extension defined in the sealing contour; wherein the at least one support projection defines at least one flat top column supporting an edge of the valve stopper, wherein the valve stopper includes a V-shaped plate including two integrated legs connected at a vertex of the V-shaped plate; and wherein the at least one support projection extends to a same level as the sealing contour.

2. The cylinder cover, according to claim 1, wherein the at least one support projection includes two support projections spaced from all sides of the inner perimeter of the sealing contour through the at least one gap and spaced from each other through another gap.

3. The cylinder cover, according to claim 1, wherein the separation of the at least one support projection from the sealing contour through the at least one gap reduces the transmission of stress to other joint regions, the other joint regions being subjected to a lower physical deformation.

Description

BRIEF DESCRIPTION OF THE FIGURES

(1) The embodiments of the objects of the present invention will be described in detail based on figures listed below, wherein:

(2) FIGS. 1A, 1B, 1C and 1D depict cylinder covers pertaining to the present state of the art;

(3) FIG. 2 depicts a preferred embodiment of a cylinder cover in accordance with the present invention;

(4) FIG. 3 depicts an optional embodiment of a cylinder cover in accordance with the present invention; and

(5) FIG. 4 depicts an example of a stopper support housing of an exhaustion valve in the preferred embodiment of a cylinder cover in accordance with the present invention.

DETAILED DESCRIPTION OF THE INVENTION

(6) According to the concepts and objects of the present invention, it is disclosed a cylinder cover whose regions of support/housing for a discharge valve stopper are capable of discrete and elastic mechanical deformation, where such deformation will never be extended (or at least strongly reduced) to the sealing regions between the compressor cavity and the exhaustion chamber of alternative compressor.

(7) This will allow for said regions to maintain the sealing integrity between the compressor and the head/compression chamber of alternative compressor.

(8) Essentially, said projections have the ability to absorb deformation exerted by the pressure of valve stopper assemblage such that deformations are not transferred to the joint region, thereby contributing to the correct functioning of the joint region.

(9) Said cylinder cover comprises an essentially rigid block 1 having a substantially square or circular perimeter.

(10) Block 1 has a sealing contour 11 defined in accordance with the format of the head/compression chamber of alternative compressor (not shown) and fixation orifices 12 usually intended for bolts (or the like) employed for securing block 1 to the head/compression chamber of alternative compressor (not shown).

(11) In this sense, and hitherto, such features are common to cylinder covers of the state of the art.

(12) Said block 1 further comprises two support extensions 2 defined from specific portions of the sealing contour 11. Using such support extensions is also common to cylinder covers of the state of the art.

(13) The great differential of the present invention resides in the fact that block 1 further provides at least one support projection spaced from the sealing contour 11 through at least one gap 4.

(14) According to a preferred embodiment of the present invention—illustrated in FIG. 2—said block 1 comprises two support projections 5 spaced from sealing contour 11 through one gap 4, and spaced from one another through another gap 6. As can be noted, said support projections 5 end up defining two top columns preferably flat and suitable for support/housing of an edge of an exhaustion valve stopper.

(15) Preferably, said support projections 5 are vertically designed from lower plate of block 1.

(16) More specifically, and as illustrated in FIG. 4, a V-shaped stopper 7 can have its distal edges 71 conventionally supported on support extensions of block 1, and its edge 72 supported on support projections 5.

(17) The embodiment of block 1, as well as the consequent assemblage of stopper 7, is responsible for “generating” members (support projections 5) having less rigidity for securing stopper 7. In this regard, it can be observed that said support projections 5 respond with elastic deformation to the force exerted by the assemblage of stopper 7 and other components constituting the valve assembly (not shown) disposed at the head of an alternative compressor. In addition, said support projections 5, just because they are “separated” from the sealing contour 11 through gap 4 significantly reduce transmission of stress to other joint regions, said regions being subjected to a lower negligible physical deformation.

(18) Efficiency of this solution is very clear through the results of cylinder cover structural deformation. Therefore, it is important to mention that laboratory tests demonstrate that the preferred embodiment of the present invention leads to a 66% deformation reduction compared to conventional embodiments (especially compared to the embodiment illustrated in FIG. 1D).

(19) The present invention further provides an optional embodiment of a cylinder cover, as illustrated in FIG. 3.

(20) Such optional embodiment is extremely similar to the preferred embodiment, that is, the cover of the optical embodiment is also constituted by block 1 provided with a sealing contour 11 fixation orifices 12 and two support extensions 2 defined from the specification portion of said sealing contour 11.

(21) Nevertheless, a huge difference between said two embodiments resides in the fact that the present optional embodiment provides only one support projection 7 disposed in the place of the support projections 5. Said support projection 3 is also spaced from the sealing contour 11 through one gap 4.

(22) Moreover, said support projection 3 defines an area surface similar to the virtual area formed by summing up the surface areas of the support projection 5 and gap 6.

(23) Hence, the optional embodiment of the cylinder cover is also capable of supporting a stopper 7.

(24) Further, it necessary to mention that although there have been illustrated embodiments in which only one support projection is spaced from the sealing contour through at least one gap, the scope of the present invention should not be limited to this amount, and, therefore, the present invention also contemplates using multiple projections spaced from the sealing contour by means of respective gaps.

(25) After describing the embodiments of the present invention, it should be understood that the scope thereof contemplates other possible variations, and it is only limited by the content of the set of claims, including possible equivalent means.