US3634904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Road sweeper suction and dirt chamber connection
Assignee: Wayne Manufacturing Co
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Filing: 1969-11-20
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Granted: 1972-01-18
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Expires: 1989-11-20
Abstract
Abstract In a road sweeper of the type employing an open bottom suction hood exposed to the road surface and connected by jointed conduits to a debris hopper carried by the sweeper frame for tilting dumping movements in response to which the conduit joints open and close, maintenance of the joints in closed condition during sweeping is assured by spring urging of the lower movable joint sections upwardly against the upper sections while maintaining the sections in axial alignment.
Inventors
- 👤 Gregory J Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:50
CPC Classifications
E; E01; E01H; E01H1/00; E01H1/08; E01H1/0827; E01H1/0836; E01H1/0845
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
149 words
In a road sweeper having a suction conduit leading to a debris hopper carried by the sweeper frame for tilting dumping movement about a horizontal axis, said conduit including a lower extent and an upper extent attached to the hopper to swing upwardly therewith in its dumping movement, a joint between said conduit extents comprising upper and lower sections separable as the hopper is dumpEd and interengageable upon restoration of the hopper and downward movement of said upper conduit extent, and means yieldably supporting the lower joint section for downward displacement about a horizontal axis generally parallel to the hopper axis and for rocking about an axis extending in the direction of sweeper travel when engaged by the upper section and acting to maintain the sections in closed engagement, whereby the lower joint section will follow hopper movement with respect to the frame which may result from road unevenness.
Claim 2
Dependent Claim
149 words
In a road sweeper having a suction conduit leading to a debris hopper carried by the sweeper frame for tilting dumping movement about a horizontal axis, said conduit including a lower extent and an upper extent attached to the hopper to swing upwardly therewith in its dumping movement, a joint between said conduit extents comprising upper and lower sections separable as the hopper is dumpEd and interengageable upon restoration of the hopper and downward movement of said upper conduit extent, and means yieldably supporting the lower joint section for downward displacement about a horizontal axis generally parallel to the hopper axis and for rocking about an axis extending in the direction of sweeper travel when engaged by the upper section and acting to maintain the sections in closed engagement, whereby the lower joint section will follow hopper movement with respect to the frame which may result from road unevenness.
Claim 3
Dependent Claim
17 words
A road sweeper according to claim 1, in which said joint sections interengage in an inclined plane.
Claim 4
Dependent Claim
15 words
A road sweeper according to claim 1, including an annular seal between the joint sections.
Claim 5
Dependent Claim
26 words
A road sweeper according to claim 1, in which said yieldable supporting means includes a spring interposed between said lower joint section and the sweeper frame.
Claim 6
Dependent Claim
17 words
A road sweeper according to claim 1, in which said lower conduit section is a flexible hose.
Claim 7
Dependent Claim
20 words
A road sweeper according to claim 4, including means limiting upward displacement of said lower joint section by said spring.
Claim 8
Dependent Claim
21 words
A road sweeper according to claim 1, including also a pivoted link connecting said lower joint section to the sweeper frame.
Claim 9
Dependent Claim
44 words
A road sweeper according to claim 1, in which said joint sections interengage in an inclined plane, said yieldable supporting means including a spring interposed between said lower section and the sweeper frame, and a pivoted link connecting the lower section to the frame.
Claim 10
Dependent Claim
42 words
A road sweeper according to claim 1, in which a suction hood beneath the vehicle frame is connected with the debris hopper by an aligned plurality of said conduits and joints, the lower joint sections including an interconnecting elongated bodily movable member.
Claim 11
Dependent Claim
19 words
A road sweeper according to claim 9, in which said upper sections and member interengage in an inclined plane.
Claim 12
Dependent Claim
22 words
A road sweeper according to claim 10, in which said yieldable support includes springs interposed between said member and the sweeper frame.
Claim 13
Dependent Claim
15 words
A road sweeper according to claim 11, including movable means interconnecting said member and frame.
Claim 14
Dependent Claim
14 words
A road sweeper according to claim 12, in which the hopper compresses said springs.
Claim 15
Dependent Claim
21 words
A road sweeper according to claim 13, in which said upper conduit extents are rigid and the lower extents are flexible.
References Cited (Backward Citations)
US599782A
Cited
US1560612A
Cited
US1973610A
Cited
US2480483A
Cited
US3154326A
Cited
US3515168A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |