Patent US3886624A successfully refreshed from Google Patents.
US3886624A
Expired / Lapsed
US
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Vacuum type sweeper
Assignee: Elgin Sweeper Co
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Filing: 1973-07-31
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Granted: 1975-06-03
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Expires: 1993-07-31
Abstract
Abstract A truck mounted vacuum type sweeper constructed for dual operation employs identical sweeping apparatus on each side of the machine and an extension broom which may be swiveled from one side of the machine to the other for left hand and right hand sweeping operations. The extension broom is mounted such that its axis of rotation is always parallel to the pavement being swept. A control system is provided for programming the operation of the machine and includes means for transferring from, for example, a left hand sweeping operation to a right hand sweeping operation by merely operating a toggle switch. The control system further includes means for automatically lifting the suction nozzles from the operator of the sweeper shifts into reverse in order to prevent damage to the nozzle supporting structure.
Inventors
- 👤 Eric Landesman
- 👤 Donald R Palmiter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:56
CPC Classifications
E; E01; E01H; E01H1/00; E01H1/02; E01H1/05; E01H1/053; E01H1/056; E01H1/08; E01H1/0827; E01H1/0836; E01H1/0845
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
140 words
A vacuum type sweeper of the type having dual side brooms mounted on opposite sides of a sweeper truck, a cylindrical rotating extension broom mounted beneath the sweeper truck and pivotable between positions wherein it is effective to sweep toward the side brooms, two transversely spaced vacuum sweepings pickups mounted on said frame immediately rearward of said extension broom, said extension broom when pivoted in one position, being operable to sweep into one of said vacuum sweepings pickups and when its other position being operable to sweep into the other of said vacuum sweepings pickups, means for selectively moving either vacuum sweepings pickup from a road travel position to a sweepings pickup position, and means for preventing uneven wear of said extension broom including means for maintaining the axis of rotation of said extension parallel to the surface being swept.
Claim 2
Dependent Claim
140 words
A vacuum type sweeper of the type having dual side brooms mounted on opposite sides of a sweeper truck, a cylindrical rotating extension broom mounted beneath the sweeper truck and pivotable between positions wherein it is effective to sweep toward the side brooms, two transversely spaced vacuum sweepings pickups mounted on said frame immediately rearward of said extension broom, said extension broom when pivoted in one position, being operable to sweep into one of said vacuum sweepings pickups and when its other position being operable to sweep into the other of said vacuum sweepings pickups, means for selectively moving either vacuum sweepings pickup from a road travel position to a sweepings pickup position, and means for preventing uneven wear of said extension broom including means for maintaining the axis of rotation of said extension parallel to the surface being swept.
Claim 3
Dependent Claim
140 words
A vacuum type sweeper of the type having dual side brooms mounted on opposite sides of a sweeper truck, a cylindrical rotating extension broom mounted beneath the sweeper truck and pivotable between positions wherein it is effective to sweep toward the side brooms, two transversely spaced vacuum sweepings pickups mounted on said frame immediately rearward of said extension broom, said extension broom when pivoted in one position, being operable to sweep into one of said vacuum sweepings pickups and when its other position being operable to sweep into the other of said vacuum sweepings pickups, means for selectively moving either vacuum sweepings pickup from a road travel position to a sweepings pickup position, and means for preventing uneven wear of said extension broom including means for maintaining the axis of rotation of said extension parallel to the surface being swept.
Claim 4
Dependent Claim
140 words
A vacuum type sweeper of the type having dual side brooms mounted on opposite sides of a sweeper truck, a cylindrical rotating extension broom mounted beneath the sweeper truck and pivotable between positions wherein it is effective to sweep toward the side brooms, two transversely spaced vacuum sweepings pickups mounted on said frame immediately rearward of said extension broom, said extension broom when pivoted in one position, being operable to sweep into one of said vacuum sweepings pickups and when its other position being operable to sweep into the other of said vacuum sweepings pickups, means for selectively moving either vacuum sweepings pickup from a road travel position to a sweepings pickup position, and means for preventing uneven wear of said extension broom including means for maintaining the axis of rotation of said extension parallel to the surface being swept.
Claim 5
Dependent Claim
125 words
A vacuum type sweeper comprising: a vehicle frame for moving along a surface to be swept; a rotatable extension broom for sweeping the surface having an axis of rotation generally at an acute angLe to the path of movement of said frame; a vacuum sweepings pickup mounted on said frame at one side of said extension broom, means connected to said pickup for moving said pickup selectively into a sweepings pickup position and into a road travel position, and mounting means for said extension broom mounting said broom in a position beneath said frame and immediately forward of said sweepings pickup for directing sweepings into said sweepings pickup, said mounting means including means positioned for maintaining said axis of rotation parallel to the swept surface.
Claim 6
Dependent Claim
125 words
A vacuum type sweeper comprising: a vehicle frame for moving along a surface to be swept; a rotatable extension broom for sweeping the surface having an axis of rotation generally at an acute angLe to the path of movement of said frame; a vacuum sweepings pickup mounted on said frame at one side of said extension broom, means connected to said pickup for moving said pickup selectively into a sweepings pickup position and into a road travel position, and mounting means for said extension broom mounting said broom in a position beneath said frame and immediately forward of said sweepings pickup for directing sweepings into said sweepings pickup, said mounting means including means positioned for maintaining said axis of rotation parallel to the swept surface.
Claim 7
Dependent Claim
92 words
A sweeper according to claim 2, wherein said means for maintaining the axis of rotation of said extension broom parallel comprises: pivotal connecting means connecting said extension broom to said vehicle frame, said pivotal connecting means having a vertical pivot axis means, a first generally horizontal pivot axis means extending longitudinally of said vehicle frame, and a generally horizontal pivot axis means extending transversely of said vehicle frame, said first and second horizontal axes means being pivotable to maintain the axis of rotation of said extension broom parallel to the swept surface.
Claim 8
Dependent Claim
27 words
A sweeper according to claim 2, wherein said means for maintaining the axis of said broom parallel includes means pivotal about at least two generally horizontal axes.
Claim 9
Dependent Claim
59 words
A sweeper according to claim 4, wherein said means for mounting said extension broom comprises an extension broom frame having front and rear ends, said broom frame including said means pivotal about at least two horizontal axes and at least one broom supporting arm connected between said extension broom and said means pivotal about at least two horizontal axes.
Claim 10
Dependent Claim
78 words
A sweeper according to claim 5, wherein said means pivotal about at least two horizontal axes comprises a first pivot member connected to said broom frame and extending longitudinally with respect to said vehicle frame, a second pivot member pivotally connected to said extension broom arm and extending transversely with respect to said vehicle frame for movement about a transverse axis, said second pivot member pivotally connected to said first pivot member for movement about a longitudinal axis.
Claim 11
Dependent Claim
36 words
A sweeper according to claim 6, comprising means connected between said broom frame and said broom arm and operable to pivot said broom about the transverse horizontal axis between a sweeping position and a transport position.
Claim 12
Dependent Claim
38 words
A sweeper according to claim 5, wherein said means for mounting said extension broom further comprises a pivotal connection means having a generally vertical pivot axis connecting the rear of said extension broom frame to said vehicle frame.
Claim 13
Dependent Claim
40 words
A sweeper according to claim 8, comprising means connected between said vehicle frame and said broom frame and operable to pivot said broom about said vertical axis between positions where the broom sweeps toward respective opposite sides of the sweeper.
Claim 14
Dependent Claim
50 words
A sweeper according to claim 8, wherein said pivotal connection means comprises a first member connected to said broom frame having a vertical bore therein, a pivot pin connected to said vehicle frame and received in said vertical bore, and means for releasably securing said pivot pin in said bore.
Claim 15
Dependent Claim
39 words
A sweeper according to claim 8, wherein said broom frame comprises an arcuate member carried at its front end, and said mounting means further comprises means depending from said vehicle frame and supporting said arcuate member in sliding relationship.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |