US3744653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lift dump vacuum apparatus
Assignee: Turf-Vac Corp
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Filing: 1971-11-08
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Granted: 1973-07-10
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Expires: 1991-11-08
Abstract
Abstract A mobile lift dump vacuum apparatus which includes a vacuum system on a wheeled frame to pick up debris. A hopper on the frame is movable from a load position in which it receives debris from a discharge conduit of the vacuum system, to a dump position in which the debris is dumped. Articulated arms and linkages support the hopper for movement upwardly and rearwardly of the frame rear wheels for dumping the debris into elevated trash bins and the like. Anti-tip means on the rear of the frame constrain the frame against tipping when the hopper is in the dump position. Actuation of the articulated arms and linkages is coordinated to operate the anti-tip means only in the dump position of the hopper. Vacuum collection bags on the hopper are located for emptying simultaneously with dumping of the debris in the hopper.
Inventors
- 👤 W Jensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:09
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/04; B60P1/30; B60P1/32; E; E01; E01H; E01H1/00; E01H1/08; E01H1/0827; E01H1/0836
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
196 words
A lift dump vacuum apparatus comprising: an elongated frame having rolling front support means and rolling rear support means rendering said frame mobile; vacuum means having a discharge conduit for discharging debris picked up by said vacuum means; a hopper having a load position and a dump position and including an inlet opening in registry with said discharge conduit in said load position to receive debris in said hopper, said dump position being located above said load position and generally rearwardly of said rear support means; articulated means including a first pair of parallel arms having their rearward extremities pivoted to opposite sides of said frame, and a second pair of parallel arms having their forward extremities pivoted to the forward extremities of said first pair of arms and their rearward extremities pivoted to opposite sides of said hopper; and power means including portions coupled between said frame and said first pair of arms to pivot said first pair of arms upwardly and rearwardly relative to said frame, and including other portions coupled between said first pair of arms and said second pair of arms to pivot said hopper upwardly and rearwardly relative to said frame.
Claim 2
Dependent Claim
196 words
A lift dump vacuum apparatus comprising: an elongated frame having rolling front support means and rolling rear support means rendering said frame mobile; vacuum means having a discharge conduit for discharging debris picked up by said vacuum means; a hopper having a load position and a dump position and including an inlet opening in registry with said discharge conduit in said load position to receive debris in said hopper, said dump position being located above said load position and generally rearwardly of said rear support means; articulated means including a first pair of parallel arms having their rearward extremities pivoted to opposite sides of said frame, and a second pair of parallel arms having their forward extremities pivoted to the forward extremities of said first pair of arms and their rearward extremities pivoted to opposite sides of said hopper; and power means including portions coupled between said frame and said first pair of arms to pivot said first pair of arms upwardly and rearwardly relative to said frame, and including other portions coupled between said first pair of arms and said second pair of arms to pivot said hopper upwardly and rearwardly relative to said frame.
Claim 3
Dependent Claim
179 words
A lift dump vacuum apparatus comprising: an elongated frame having rolling front support means and rolling rear support means rendering said frame mobile; vacuum means having a discharge conduit for discharging debris picked up by said vacuum means; a hopper having a load position and a dump position and including an inlet opening in registry with said discharge Conduit in said load position to receive debris in said hopper, said dump position being located above said load position and generally rearwardly of said rear support means, said hopper further including a door pivotable to an open position for dumping the contents of said hopper in said dump position; articulated means including portions pivotally coupled to said hopper and to said frame; power means coupled to said articulated means and operative to upwardly and rearwardly pivot said hopper from said load position to said dump position; and vacuum bag means carried by said hopper and having lower ends uncovered upon movement of said door to said open position to simultaneously dump the contents of said bags through said lower ends.
Claim 4
Dependent Claim
179 words
A lift dump vacuum apparatus comprising: an elongated frame having rolling front support means and rolling rear support means rendering said frame mobile; vacuum means having a discharge conduit for discharging debris picked up by said vacuum means; a hopper having a load position and a dump position and including an inlet opening in registry with said discharge Conduit in said load position to receive debris in said hopper, said dump position being located above said load position and generally rearwardly of said rear support means, said hopper further including a door pivotable to an open position for dumping the contents of said hopper in said dump position; articulated means including portions pivotally coupled to said hopper and to said frame; power means coupled to said articulated means and operative to upwardly and rearwardly pivot said hopper from said load position to said dump position; and vacuum bag means carried by said hopper and having lower ends uncovered upon movement of said door to said open position to simultaneously dump the contents of said bags through said lower ends.
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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |