US3722667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual wiping device for a conveyor belt in which both wipers have a common pivotal support but operate independently of each other
Assignee: Individual
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Filing: 1971-06-14
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Granted: 1973-03-27
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Expires: 1991-06-14
Abstract
Abstract Dual wipers for a conveyor belt in which both wipers have the same pivotal support and carry transversely extending wiping members with respect to the belt being wiped. Both wiping members are disposed on the same side of the common pivotal support and each has an independent adjustable weight or spring disposed on the other side of the pivotal support that yieldingly holds its wiping member in contact with the belt and independently of the other wiping member.
Inventors
- 👤 L Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:38
CPC Classifications
B; B65; B65G; B65G45/00; B65G45/10; B65G45/12; B65G45/16
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
294 words
A dual wiping device for a conveyor belt comprising: a. an elongated common pivotal support arranged close to a head pulley, the axis of said elongated common pivotal support paralleling the axis of the head pulley; b. an outer wiping element extending substantially across the entire width of a conveyor belt that is wrapped around the head pulley; c. a first rigid frame supporting said outer wiping element on one side of the common pivotal support and being rockably carried by said pivotal support, said frame having a portion extending on to the opposite side of said pivotal support; d. a first yielding means connected to said first frame on the opposite side of said pivotal support from that which supports said outer wiping element, for yieldingly holding said first wiping element in contact with substantially the entire width of the conveyor belt; e. an inner wiping element extending transversely across the greater portion of the width of the conveyor belt; f. a second rigid frame supporting said inner wiping element in a position lying between said outer wiping element and said common pivotal support, said second frame lying within the area enclosed by said first frame and being rockably carried by said common pivotal support, said second frame having a portion extending onto the opposite side of said pivotal support and lying within the area enclosed by the portion of said first frame that extends on the opposite side of said pivotal support; and g. a second yielding means connected to said second frame on the opposite side of said pivotal support from that which supports said inner wiping element, for yieldingly holding said second wiping element in contact with the conveyor belt and independently of the action of said first wiping element.
Claim 2
Dependent Claim
294 words
A dual wiping device for a conveyor belt comprising: a. an elongated common pivotal support arranged close to a head pulley, the axis of said elongated common pivotal support paralleling the axis of the head pulley; b. an outer wiping element extending substantially across the entire width of a conveyor belt that is wrapped around the head pulley; c. a first rigid frame supporting said outer wiping element on one side of the common pivotal support and being rockably carried by said pivotal support, said frame having a portion extending on to the opposite side of said pivotal support; d. a first yielding means connected to said first frame on the opposite side of said pivotal support from that which supports said outer wiping element, for yieldingly holding said first wiping element in contact with substantially the entire width of the conveyor belt; e. an inner wiping element extending transversely across the greater portion of the width of the conveyor belt; f. a second rigid frame supporting said inner wiping element in a position lying between said outer wiping element and said common pivotal support, said second frame lying within the area enclosed by said first frame and being rockably carried by said common pivotal support, said second frame having a portion extending onto the opposite side of said pivotal support and lying within the area enclosed by the portion of said first frame that extends on the opposite side of said pivotal support; and g. a second yielding means connected to said second frame on the opposite side of said pivotal support from that which supports said inner wiping element, for yieldingly holding said second wiping element in contact with the conveyor belt and independently of the action of said first wiping element.
Claim 3
Dependent Claim
61 words
The combination as set forth in claim 1: and in which a. said first frame includes a pair of spaced apart sleeves rotatably mounted on said common pivotal support; b. a radially extending and forwardly projecting arm rigidly connected to each sleeve; and c. a first carrier supporting said outer wiping element and being rigidly connected to said radially extending arms.
Claim 4
Dependent Claim
104 words
The combination as set forth in claim 2: and in which a. the portion of said first frame that extends on the opposite side of said pivotal support from that of said first wiping element includes a pair of rearwardly extending arms, one of the rearwardly extending arms being rigidly connected to one of said sleeves and the other rearwardly extending arm being rigidly connected to the other sleeve, both arms extending at an angle to the sleeves and meeting each other at their rear ends; and b. said first yielding means including a counterweight connected to said rearwardly extending arms at their juncture.
Claim 5
Dependent Claim
96 words
The combination as set forth in claim 2: and in which a. said second frame includes an elongated sleeve that is rotatably mounted on said common pivotal support and lies between the pair of spaced apart sleeves; b. a pair of radially extending arms rigidly connected to said elongated sleeve and paralleling the forwardly projecting arms that are carried by said spaced apart sleeves and lying inside of these arms; and c. a second carrier supporting said inner wiping element and being rigidly connected to said radially extending arms that are carried by said elongated sleeve.
Claim 6
Dependent Claim
102 words
The combination as set forth in claim 4: and in which a. the portion of said second frame that extends on the opposite side of said pivotal support from that of said second wiping element includes a pair of rearwardly extending arms rigidly connected to said elongated sleeve, both arms extending at an angle and lying inside of the rearwardly extending arms connected to said spaced apart sleeves, and abutting each other at their rear ends; and b. said second yielding means including a counterweight connected to said rearwardly extending arms at their juncture, these arms being carried by said elongated sleeve.
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) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |