Fuel pump mounting arrangement

Claim 2

An arrangement of the character described, comprisinG wall means defining an enclosed compartment adapted to contain a fluid and having a bottom wall portion provided with an opening which communicates with the exterior of said compartment, and with an annular groove surrounding said opening; pump means accommodated in said compartment at least partly immersed in said fluid; inlet means on said pump means for admitting fluid to the latter, and outlet means for pumped fluid communicating with said pump means and extending through said opening; vibration-damping mounting means mounting said pump means on said bottom wall portion in a sense at least reducing the transmission of vibrations between them, including spring means, and a diaphragm interposed between said pump means and said spring means and having a circumferential marginal portion provided with a thickened bead sealingly received in said annular groove; and cover means overlying said groove and at least a portion of said opening and maintaining said bead in the former.

Claim 3

An arrangement as defined in claim 1, said spring means being a helical spring coaxial with said opening within the confines of the same and having opposite ends which respectively bear on said cover means and, via said diaphragm, on said pump means; and a bearing plate interposed between said spring and said diaphragm.

Claim 4

An arrangement of the character described, comprising wall means defining an enclosed compartment adapted to contain a fluid and having a bottom wall portion provided with an opening which communicates with the exterior of said compartment, and with an annular groove surrounding said opening; pump means accommodated in said compartment at least partly immersed in said fluid; inlet means on said pump means for admitting fluid to the latter, and outlet means for pumped fluid communicating with said pump means and extending through said opening; vibration-damping mounting means mounting said pump means on said bottom wall portion in a sense at least reducing the transmission of vibrations between them, including spring means, and a cup-shaped diaphragm straddling said spring means and having a transverse wall portion facing the interior of said compartment, an open side opposite said transverse wall portion, and an aperture in said transverse wall portion bounded by a tubular wall portion projecting towards said open side, said pump means including at least one pump portion fast with said pump means and extending into said tubular wall portion; and retaining means retaining said pump portion in said tubular wall portion.

Claim 5

An arrangement of the character described, comprising wall means defining an enclosed compartment adapted to contain a fluid and having a bottom wall portion provided with an opening which communicates with the exterior of said compartment, and with an annular groove surrounding said opening; pump means accommodated in said compartment at least partly immersed in said fluid; inlet means on said pump means for admitting fluid to the latter, and outlet means for pumped fluid communicating with said pump means and extending through said opening; vibration-damping mounting means mounting said pump means on said bottom wall portion in a sense at least reducing the transmission of vibrations between them, including spring means, and a cup-shaped diaphragm straddling said spring means and having a transverse wall portion facing the interior of said compartment, an open side opposite said transverse wall portion, and an aperture in said transverse wall portion bounded by a tubular wall portion projecting towards said open side, said pump means including at least one pump portion fast with said pump means and extending into said tubular wall portion; and retaining means retaining said pump portion in said tubular wall portion.

Claim 6

An arrangement as defined in claim 3, wherein said outlet means comprises an outlet conduit, and wherein said pump portion is at least a part of said outlet conduit.

Claim 7

An arrangement as defined in claim 3; further comprising a cover sealingly overlying said open side and said opening and defining with the interior of said cup-shaped diaphragm an elastic pressure-equalizing chamber, said spring means being accommodated in said chamber; and wherein said outlet means comprises an outlet conduit including said pump portion which communicates with the interior of said chamber, and a discharge portion provided on said cover and communicating with the interior of said chamber as well as with the exterior of the latter and of said compartment.

Claim 8

An arrangement of the character described, comprising wall means defining an enclosed compartment adapted to contain a fluid and having a wall portion provided with an opening; a diaphragm sealingly extending across said opening; spring means engaging said diaphragm exteriorly of said compartment for limiting displacement of said diaphragm in directions intersecting the plane of said opening; an electrically operable pump accommodated in said compartment at least partly immersed in said fluid and mounted on said diaphragm so that the transmission of vibrations between said pump and said wall portion is at least reduced; and inlet means on said pump for admitting fluid to the latter, and outlet means for pumped fluid communicating with said pump and with the exterior of said enclosed compartment.

Claim 9

An arrangement of the character described, comprising wall means defining an enclosed compartment adapted to contain a fluid and having a wall portion provided with an opening; a diaphragm sealingly extending across said opening; spring means engaging said diaphragm exteriorly of said compartment for limiting displacement of said diaphragm in directions intersecting the plane of said opening; an electrically operable pump accommodated in said compartment at least partly immersed in said fluid and mounted on said diaphragm so that the transmission of vibrations between said pump and said wall portion is at least reduced; and inlet means on said pump for admitting fluid to the latter, and outlet means for pumped fluid communicating with said pump and with the exterior of said enclosed compartment.

Claim 10

An arrangement as defined in claim 6, said enclosed compartment being the fuel tank for a liquid-fuel engine, and said wall portion being a bottom wall portion.

Claim 11

An arrangement as defined in claim 7, said outlet means extending through said opening.

Claim 12

An arrangement as defined in claim 6, said spring means comprising a helical spring coaxial with said opening and bearing on said diaphragm.