Sound deadener for vibratory conveyor

Claim 2

In a vibratory conveyor, the combination comprising: a conveying surface adapted to convey articles when vibrated, said surface being formed of material that will generate sound when contacting articles being coNveyed and having an input end and an output end; a vibrating mechanism for vibrating said surface to cause articles to be conveyed therealong; sound deadening means for said surface comprising means defining a chamber under said surface and in abutment therewith and particle passage means adjacent the input end of said surface defining at least one opening of sufficient size to permit particles on said surface to enter said chamber to be compacted therein and against said surface to preclude the same from vibrating at a frequency in the audible range; and means for retaining a compacted body of particles within said chamber and against said surface.

Claim 3

A vibratory conveyor comprising a metal conveying plate having an input end adapted to receive articles to be conveyed, and an output end; a vibrating mechanism for vibrating said plate so that articles received at said input end will be conveyed therealong to said output end; and sound deadening means for precluding said metal plate from vibrating substantially in the audible range due to contact of the same with articles being conveyed thereby including means defining, in conjunction with the underside of said plate, a substantially closed chamber, at least one particle passage extending through said plate near said input end into said chamber of sufficient size to allow particles received on said plate to pass through said passage into said chamber to be compacted therein against each other and against said plate by said vibrating mechanism to preclude the plate from vibrating at a frequency in the audible range; and means for retaining a sufficient number of particles in said chamber so that the particles will be compacted against said plate.

Claim 4

A vibratory conveyor comprising a metal conveying plate having an input end adapted to receive articles to be conveyed, and an output end; a vibrating mechanism for vibrating said plate so that articles received at said input end will be conveyed therealong to said output end; and sound deadening means for precluding said metal plate from vibrating substantially in the audible range due to contact of the same with articles being conveyed thereby including means defining, in conjunction with the underside of said plate, a substantially closed chamber, at least one particle passage extending through said plate near said input end into said chamber of sufficient size to allow particles received on said plate to pass through said passage into said chamber to be compacted therein against each other and against said plate by said vibrating mechanism to preclude the plate from vibrating at a frequency in the audible range; and means for retaining a sufficient number of particles in said chamber so that the particles will be compacted against said plate.

Claim 5

The vibratory conveyor of claim 2 wherein said particle passage comprises a plurality of apertures extending through said plate and said chamber is defined by a second plate spaced below said first plate, said chamber being sealed except for said passages to define said retaining means.

Claim 8

The method of claim 4 wherein said heavy articles are castings and said particles are sand particles.

Claim 9

In a vibratory device, the combination comprising: a vibratory surface adapted to perform work on articles when vibrated, said surface being formed of a material that will generate sound when contacting the articles being worked upon; a vibrating mechanism for vibrating said surface to cause work to be performed on articles contacting the same; and sound deadening means for said surface comprising means defining a chamber adjacent said surface and in abutment therewith, and means comprising a compacted body of dividual particles within said chamber to preclude the same from vibrating at a frequency in an audible range.

Claim 10

In a vibratory device, the combination comprising: a vibratory surface adapted to perform work on articles when vibrated, said surface being formed of a material that will generate sound when contacting the articles being worked upon; a vibrating mechanism for vibrating said surface to cause work to be performed on articles contacting the same; and sound deadening means for said surface comprising means defining a chamber adjacent said surface and in abutment therewith, and means comprising a compacted body of dividual particles within said chamber to preclude the same from vibrating at a frequency in an audible range.