US3750340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agitator assembly for sand tank
Assignee: Individual
•
Filing: 1971-09-02
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Granted: 1973-08-07
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Expires: 1991-09-02
Abstract
Abstract A device to remedy the clogging of sand in the tank of sand blasting equipment. An outlet funnel having an inner cup-like configuration is mounted in a discharge opening at the bottom of the sand tank. It delivers to a flow control device wherein air picks up sand and feeds it to a delivery hose. A cylindrical ring element, secured to the arms of a yoke, nests in the cup-like funnel. The yoke merges above the ring into a central vertical stem, which rises through the body of sand in the storage vessel, and passes through a pressure-tight gland in the top of the tank. A handle on the projecting end of the stem permits free rotation in place, and limited up-and-down movement against resilient packing in the gland, so that the yoke, on agitation, will free clogged sand blocking the outlet.
Inventors
- 👤 R Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:38
CPC Classifications
B; B24; B24C; B24C7/00; B24C7/0046; B24C7/0069
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
118 words
In sand blasting equipment of the type in which sand is supplied directly from a closed vessel serving as a storage tank to a feed control unit located outside of said vessel, the combination of a rod mounted in the top of said vessel and having means outside the vessel to rotate it and means inside the vessel to limit its upward movement; a cup-like funnel at the bottom of the vessel discharging from the interior of said vessel to said feed control unit; an annulus position within said cup-like funnel and configured to nest therein; and a yoke on the lower end of said rod, the tip ends of which yoke are functionally integral with said annulus.
Claim 2
Dependent Claim
118 words
In sand blasting equipment of the type in which sand is supplied directly from a closed vessel serving as a storage tank to a feed control unit located outside of said vessel, the combination of a rod mounted in the top of said vessel and having means outside the vessel to rotate it and means inside the vessel to limit its upward movement; a cup-like funnel at the bottom of the vessel discharging from the interior of said vessel to said feed control unit; an annulus position within said cup-like funnel and configured to nest therein; and a yoke on the lower end of said rod, the tip ends of which yoke are functionally integral with said annulus.
Claim 3
Dependent Claim
119 words
In sand blasting equipment of the type in which sand is supplied directly to the sand blast feed control unit from a closed vessel, the provision of an agitator assembly comprising a bushing mounted in an upper wall of said vessel, an operating rod journaled in said bushing, and means on the rod outside the vessel for rotating the rod; a cup-like funnel in a bottom wall of said vessel through which sand is supplied to said feed control unit; an annulus supported in said funnel and having an outer surface adapted to fit rotatably therein, and yoke means having at least two divergent legs on the lower portion of said rod with their tips welded to said annulus.
Claim 4
Dependent Claim
119 words
In sand blasting equipment of the type in which sand is supplied directly to the sand blast feed control unit from a closed vessel, the provision of an agitator assembly comprising a bushing mounted in an upper wall of said vessel, an operating rod journaled in said bushing, and means on the rod outside the vessel for rotating the rod; a cup-like funnel in a bottom wall of said vessel through which sand is supplied to said feed control unit; an annulus supported in said funnel and having an outer surface adapted to fit rotatably therein, and yoke means having at least two divergent legs on the lower portion of said rod with their tips welded to said annulus.
Claim 5
Dependent Claim
48 words
Apparatus as set forth in claim 2 wherein the upper portion of said rod passes through a packing ring of resilient material below said bushing, and a collar element is pinned to the rod below said resilient packing ring, whereby the rod may be given limited vertical movement.
Claim 6
Dependent Claim
26 words
Apparatus as set forth in claim 2, wherein the cup-like funnel has an inner diameter approximately double that of the opening into said feed control unit.
Claim 7
Dependent Claim
25 words
Apparatus as set forth in claim 3, wherein a spud is used to consolidate the union between the surface of the vessel and the bushing.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-06 | 1977-02-05 | 1977-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-06 | 1981-02-05 | 1981-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-06 | 1985-02-05 | 1985-08-07 | $7700.00 | Window Closed / Lapsed |