US3660943A — Shot blast chamber and impeller liners

Claim 1

Independent Claim 208 words

In a blast cleaning machine including an abrasive storage and feed container and a cleaning chamber, an improved impeller unit receiving abrasive from the storage container and hurling the abrasive into the cleaning chamber, comprising: a first housing; an impeller wheel rotatably mounted in said housing for hurling the abrasive into said cleaning chamber; a first replaceable liner secured to the inner surface of said housing adjacent said wheel, said liner formed from an impact absorbent material for absorbing a portion of the energy of the abrasive to lengthen the service life of said liner; said cleaning chamber comprising: a second housing; a second replaceable liner secured to the inner surface of said second housing and having an inner surface formed from an impact absorbing material for absorbing a portion of the energy of the abrasive to lengthen the service life of said liner, said second housing including a substantially horizontal circular part supporting surface, the central portion of said supporting surface being formed by a rotatably mounted circular table and said second liner including a substantially flat elongated arcuate member having its outer arcuate edges secured to the outer edge of said part supporting surface and its inner arcuate edge loosely engaging the periphery of said table.

Claim 2

Dependent Claim 208 words

In a blast cleaning machine including an abrasive storage and feed container and a cleaning chamber, an improved impeller unit receiving abrasive from the storage container and hurling the abrasive into the cleaning chamber, comprising: a first housing; an impeller wheel rotatably mounted in said housing for hurling the abrasive into said cleaning chamber; a first replaceable liner secured to the inner surface of said housing adjacent said wheel, said liner formed from an impact absorbent material for absorbing a portion of the energy of the abrasive to lengthen the service life of said liner; said cleaning chamber comprising: a second housing; a second replaceable liner secured to the inner surface of said second housing and having an inner surface formed from an impact absorbing material for absorbing a portion of the energy of the abrasive to lengthen the service life of said liner, said second housing including a substantially horizontal circular part supporting surface, the central portion of said supporting surface being formed by a rotatably mounted circular table and said second liner including a substantially flat elongated arcuate member having its outer arcuate edges secured to the outer edge of said part supporting surface and its inner arcuate edge loosely engaging the periphery of said table.

Claim 3

Dependent Claim 21 words

The impeller unit as defined in claim 1, wherein a plurality of said first replaceable liners are secured within said housing.

Claim 4

Dependent Claim 28 words

The impeller unit as defined in claim 1, wherein said first liner is substantially flat and includes an arcuate edge disposed immediately adjacent the periphery of said wheel.

Claim 5

Dependent Claim 21 words

The impeller unit as defined in claim 1, wherein the inner surface of said first liner is formed from urethane rubber.

Claim 6

Dependent Claim 32 words

The impeller unit as defined in claim 1, wherein said first liner includes a metallic base member having a layer of urethane rubber secured thereto forming the inner surface of said liner.

Claim 7

Dependent Claim 50 words

The impeller unit as defined in claim 1, wherein a plurality of said first liners are secured within said housing, each of said first liners including a generally flat L-shaped member with an inner arcuate edge disposed adjacent the periphery of said wheel with said member disposed radially outward therefrom.

Claim 8

Dependent Claim 91 words

The impeller unit as defined in claim 1, wherein said first liner includes a generally flat member disposed in a plane substantially perpendicular to the axis of rotation of said wheel, and including a third replaceable liner secured to said first outer housing and having a portion engaging the outer edge of said first mentioned liner and forming substantially a right angle therewith, said portion of said third liner having its surface engaged with said first mentioned liner formed from an absorbent material for resisting the destructive action of the abrasive.

Claim 9

Dependent Claim 15 words

The impelleR unit as defined in claim 7, wherein said absorbent material is urethane rubber.

Claim 10

Dependent Claim 191 words

The blast cleaning machine as defined in claim 1, wherein said impeller unit includes a pair of opposed parallel circular disks; a plurality of said first replaceable liners, each of said first liners including a generally flat L-shaped metallic member with an inner arcuate edge disposed adjacent the periphery of one of said disks, each of said first liners being disposed radially outward from one of said disks in substantially the same plane as the disk, each of said metallic members having a layer of impact absorbing material secured thereto forming the inner surface of said first liners; and at least one metallic elongated member secured to said first outer housing and having a portion disposed between at least two of said first replaceable liners having their arcuate portions adjacent opposite disks, said elongated member including an outwardly extending flange formed along each side thereof parallel to the axis of elongation of said elongated member, the inner surface of each of said flanges engaging an outer edge of one of said first replaceable liners and having a layer of impact absorbing material secured thereto for forming a seal with said edges.

Claim 11

Dependent Claim 144 words

In a blast cleaning machine including an abrasive storage and feed container and an impeller unit, an improved cleaning chamber for receiving the abrasive hurled by the impeller unit to clean the parts disposed therein, comprising: an outer housing; and a replaceable liner secured to the inner surface of said outer housing and having an inner surface formed from an impact absorbing material for absorbing a portion of the energy of the abrasive to lengthen the service life of said liner, said outer housing including a substantially horizontal circular part supporting surface, the central portion of said supporting surface being formed by a rotatably mounted circular table and said liner including a substantially flat elongated arcuate member having its outer arcuate edges secured to the outer edge of said part supporting surface and its inner arcuate edge loosely engaging the periphery of said table.

Claim 12

Dependent Claim 144 words

In a blast cleaning machine including an abrasive storage and feed container and an impeller unit, an improved cleaning chamber for receiving the abrasive hurled by the impeller unit to clean the parts disposed therein, comprising: an outer housing; and a replaceable liner secured to the inner surface of said outer housing and having an inner surface formed from an impact absorbing material for absorbing a portion of the energy of the abrasive to lengthen the service life of said liner, said outer housing including a substantially horizontal circular part supporting surface, the central portion of said supporting surface being formed by a rotatably mounted circular table and said liner including a substantially flat elongated arcuate member having its outer arcuate edges secured to the outer edge of said part supporting surface and its inner arcuate edge loosely engaging the periphery of said table.

Claim 13

Dependent Claim 20 words

The cleaning chamber as defined in claim 10, wherein a plurality of said replaceable liners are secured within said housing.

Claim 14

Dependent Claim 20 words

The cleaning chamber as defined in claim 10, wherein the inner surface of said liner is formed from urethane rubber.

Claim 15

Dependent Claim 19 words

The cleaning chamber as defined in claim 10, wherein substantially all of the liner is formed from urethane rubber.

Claim 16

Dependent Claim 126 words

In a blast cleaning machine including an abrasive storage and feed container and an impeller unit, an improved cleaning unit for receiving the abrasive hurled by the impeller unit to clean the parts disposed therein, said cleaning unit comprising: an outer housing; a replaceable liner; and means securing said liner to the inner surface of said outer housing, said liner formed from an impact absorbing material for absorbing a portion of the energy of the abrasive to lengthen the service life of said liner, said means for securing said liner to the surface of said housing comprising a downwardly opening U-shaped channel secured to one surface of said liner and a flange member secured to said inner surface of said housing to receive said U-shaped channel.

Claim 17

Dependent Claim 126 words

In a blast cleaning machine including an abrasive storage and feed container and an impeller unit, an improved cleaning unit for receiving the abrasive hurled by the impeller unit to clean the parts disposed therein, said cleaning unit comprising: an outer housing; a replaceable liner; and means securing said liner to the inner surface of said outer housing, said liner formed from an impact absorbing material for absorbing a portion of the energy of the abrasive to lengthen the service life of said liner, said means for securing said liner to the surface of said housing comprising a downwardly opening U-shaped channel secured to one surface of said liner and a flange member secured to said inner surface of said housing to receive said U-shaped channel.

Claim 18

Dependent Claim 174 words

In a blast cleaning machine for cleaning an article, said machine including an abrasive storage and feed container and a cleaning unit, an improved impeller unit receiving abrasive from the storage container and hurling the abrasive into the cleaning unit, said impeller unit comprising: a housing; an impeller wheel rotatably mounted in said housing for hurling the abrasive into said cleaning unit; said housing having a pair of side walls substantially normal to the axis of rotation of said impeller wheel and end walls joining said side walls; replaceable liners formed of an impact absorbent material secured to the inner surface of saiD side walls for absorbing a portion of the energy of the abrasive to lengthen the service life of the liner; and the areas of said end walls adjacent said side walls being provided with impact absorbent material engaging with said liners to form a seal at the joint between said side walls and said end walls with an intermediate portion of said end walls being free of said impact absorbent material.

Claim 19

Dependent Claim 174 words

In a blast cleaning machine for cleaning an article, said machine including an abrasive storage and feed container and a cleaning unit, an improved impeller unit receiving abrasive from the storage container and hurling the abrasive into the cleaning unit, said impeller unit comprising: a housing; an impeller wheel rotatably mounted in said housing for hurling the abrasive into said cleaning unit; said housing having a pair of side walls substantially normal to the axis of rotation of said impeller wheel and end walls joining said side walls; replaceable liners formed of an impact absorbent material secured to the inner surface of saiD side walls for absorbing a portion of the energy of the abrasive to lengthen the service life of the liner; and the areas of said end walls adjacent said side walls being provided with impact absorbent material engaging with said liners to form a seal at the joint between said side walls and said end walls with an intermediate portion of said end walls being free of said impact absorbent material.

Claim 20

Dependent Claim 110 words

In a blast cleaning machine including an abrasive storage and feed container and an impeller unit, an improved cleaning unit for receiving the abrasive hurled by the impeller unit to clean the parts disposed therein, said cleaning unit comprising a housing, a table carried within said housing, a plurality of rings secured to said table for maintaining the position of the parts to be cleaned on said table, and including at least one generally flat replaceable liner formed from impact absorbing material secured to said table between a pair of said rings, said liner being formed with a pair of concave arcuate edges disposed adjacent the periphery of said rings.

Claim 21

Dependent Claim 110 words

In a blast cleaning machine including an abrasive storage and feed container and an impeller unit, an improved cleaning unit for receiving the abrasive hurled by the impeller unit to clean the parts disposed therein, said cleaning unit comprising a housing, a table carried within said housing, a plurality of rings secured to said table for maintaining the position of the parts to be cleaned on said table, and including at least one generally flat replaceable liner formed from impact absorbing material secured to said table between a pair of said rings, said liner being formed with a pair of concave arcuate edges disposed adjacent the periphery of said rings.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1975-05-09	1975-11-08	1976-05-09	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1979-05-09	1979-11-08	1980-05-09	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1983-05-09	1983-11-08	1984-05-09	$7700.00	Window Closed / Lapsed

Shot blast chamber and impeller liners

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