US3687313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plunger shield for refuse vehicle loading chamber
Assignee: SMITHPAC CANADA Ltd
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Filing: 1970-01-19
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Granted: 1972-08-29
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Expires: 1990-01-19
Abstract
Abstract A refuse-collecting apparatus or vehicle includes a supporting frame or chassis having a refuse-receiving receptacle pivotally mounted thereon for tilting movement between a generally horizontal loading position and a tilted dumping position. A loading plunger is provided within a fixed loading chamber on the chassis for the purpose of pushing refuse from the loading chamber through a loading aperture into the refuse-receiving receptacle when the latter is disposed in its generally horizontal loading position. A contractable shield is affixed to the loading plunger and extends outwardly therefrom relative to the refuse-receiving receptacle and is movable with the loading plunger for the purpose of preventing refuse falling into the loading chamber outwardly of the loading plunger. In one arrangement, such a contractable shield includes a flexible curtain and a resiliently extensible spring means attached to the flexible curtain and suitably anchored on the vehicle. In another construction, the contractable shield includes a pair of generally planar plates which are movable between an extended position of minimum overlap and a retracted telescoped configuration.
Inventors
- 👤 Harold Eugene Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:14
CPC Classifications
B; B65; B65F; B65F3/00; B65F3/14; B65F3/20; B65F3/201; B65F3/24; B65F3/26
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
261 words
A refuse-collecting apparatus comprising: a supporting frame; a refuse-receiving receptacle mounted on said supporting frame and including a wall with a loading aperture extending therethrough; a loading chamber disposed on said supporting frame so as to be adjacent said loading aperture; a loading plunger within said loading chamber for longitudinal movement therethrough toward and away from said loading aperture for pushing refuse through said loading aperture into said refuse-receiving receptacle; a loading plunger drive mechanism operatively associated with said loading plunger for effecting said movement of said loading plunger toward and away from said loading aperture; a contractable shield affixed to said loading plunger, extending outwardly therefrom relative to said refuse-receiving receptacle and movable with said loading plunger, said shield being flexible along its length whereby it can be flexed progressively along its length, said shield being positioned to prevent refuse from falling behind said loading plunger when said loading plunger is moved toward said loading aperture; a guide and scraper element for said shield extending across said loading chamber in the vicInity of the extreme displacement of said plunger from said loading aperture; and yieldable tensioning means coupled to said shield and arranged to draw said shield about said guide and scraper element along a linear path generally normal to the path of approach of said shield to said guide and scraper element from said loading plunger whereby said shield is guided and scraped during movement of said loading plunger to permit extension and contraction of said shield as said plunger is moved toward and away from said loading aperture.
Claim 2
Dependent Claim
261 words
A refuse-collecting apparatus comprising: a supporting frame; a refuse-receiving receptacle mounted on said supporting frame and including a wall with a loading aperture extending therethrough; a loading chamber disposed on said supporting frame so as to be adjacent said loading aperture; a loading plunger within said loading chamber for longitudinal movement therethrough toward and away from said loading aperture for pushing refuse through said loading aperture into said refuse-receiving receptacle; a loading plunger drive mechanism operatively associated with said loading plunger for effecting said movement of said loading plunger toward and away from said loading aperture; a contractable shield affixed to said loading plunger, extending outwardly therefrom relative to said refuse-receiving receptacle and movable with said loading plunger, said shield being flexible along its length whereby it can be flexed progressively along its length, said shield being positioned to prevent refuse from falling behind said loading plunger when said loading plunger is moved toward said loading aperture; a guide and scraper element for said shield extending across said loading chamber in the vicInity of the extreme displacement of said plunger from said loading aperture; and yieldable tensioning means coupled to said shield and arranged to draw said shield about said guide and scraper element along a linear path generally normal to the path of approach of said shield to said guide and scraper element from said loading plunger whereby said shield is guided and scraped during movement of said loading plunger to permit extension and contraction of said shield as said plunger is moved toward and away from said loading aperture.
Claim 3
Dependent Claim
85 words
A combination in accordance with claim 1 wherein said yieldable tensioning means comprises a rod; means securing said flexible shield to said rod; a guide extending generally normal to the path of longitudinal movement of said loading plunger and coupled to said loading chamber in the vicinity of the extreme displacement of said plunger from said loading aperture; means coupling said rod to said guide for guided movement and biasing means yieldably urging said rod along said guide in a direction away from said plunger.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |