US4718544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible lagging strips for drum pulleys
Assignee: Individual
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Filing: 1986-04-30
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Granted: 1988-01-12
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Expires: 2006-04-30
Abstract
Abstract A replaceable lagging structure, for a conveyor pulley, and specifically to a flexible lagging structure useable and adaptable on different size pulley drums. The structure preferably has a pair of parallel, elongated, arc shaped metal plates which are connected together by a flexible traction rubber pad. The outer elongated arc plate edges are adapted to be spot-welded to the periphery of a pulley drum surface. The arc shape of each metal section is such that the lagging structure is adapted to fit different sized drum pulleys. The thickness of the metal sections does not restrict or hinder the required flexibility of the lagging structure.
Inventors
- 👤 Harold L. Herren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:39
CPC Classifications
B; B65; B65G; B65G39/00; B65G39/02; B65G39/07
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
94 words
A flexible, replaceable lagging structure conbination for attachment to the peripheral surface of a conveyor belt drum pulley, said combination comprising a single length of flexible rubber traction material and at least two spaced-apart arcuate metal sections; wherein each said metal section is secured to the underside of said length of flexible rubber traction material; wherein one edge of each of the outermost metal sections is exposed for welding to said surface of said pulley, and said rubber traction material is disposed above said metal sections and provides a traction surface for said pulley.
Claim 2
Dependent Claim
94 words
A flexible, replaceable lagging structure conbination for attachment to the peripheral surface of a conveyor belt drum pulley, said combination comprising a single length of flexible rubber traction material and at least two spaced-apart arcuate metal sections; wherein each said metal section is secured to the underside of said length of flexible rubber traction material; wherein one edge of each of the outermost metal sections is exposed for welding to said surface of said pulley, and said rubber traction material is disposed above said metal sections and provides a traction surface for said pulley.
Claim 3
Dependent Claim
35 words
A combination in accordance with claim 1, wherein said metal sections are parallel, and wherein adjacent edges of said metal sections are separated by a distance in the range of about 0.2 to 0.5 inch.
Claim 4
Dependent Claim
24 words
A combination in accordance with claim 1, wherein each said metal section has a width in the range of about 2 to 3 inches.
Claim 5
Dependent Claim
30 words
A combination in accordance with claim 1, wherein said rubber material is vulcanized in the presence of said metal sections to thereby bond said metal sections to said rubber material.
Claim 6
Dependent Claim
28 words
A combination in accordance with claim 1, wherein each said metal section has an arc shape with a radius in the range of about 5 to 6 inches.
Claim 7
Dependent Claim
23 words
A combination in accordance with claim 1, wherein said lagging structure has a width in the range of about 4 to 16 inches.
Claim 8
Dependent Claim
129 words
A flexible, replaceable lagging structure combination for attachment to the peripheral surface of a conveyor belt drum pulley, said conbination comprising a single length of flexible rubber traction material and two spaced-apart arcuate metal sections having a thickness in the range of about 0.07 to 0.5 inch; wherein each said metal section is secured to the underside of said length of flexible rubber traction material; wherein adjacent edges of said metal sections are parallel to each other and are separated by a distance in the range of about 0.1 to 0.5 inch; wherein one edge of each said metal section is exposed for welding to said surface of said pulley, and said rubber traction material is disposed above said metal sections and provides a traction surface for said pulley.
Claim 9
Dependent Claim
129 words
A flexible, replaceable lagging structure combination for attachment to the peripheral surface of a conveyor belt drum pulley, said conbination comprising a single length of flexible rubber traction material and two spaced-apart arcuate metal sections having a thickness in the range of about 0.07 to 0.5 inch; wherein each said metal section is secured to the underside of said length of flexible rubber traction material; wherein adjacent edges of said metal sections are parallel to each other and are separated by a distance in the range of about 0.1 to 0.5 inch; wherein one edge of each said metal section is exposed for welding to said surface of said pulley, and said rubber traction material is disposed above said metal sections and provides a traction surface for said pulley.
Claim 10
Dependent Claim
24 words
A combination in accordance with claim 7, wherein each said metal section has a width in the range of about 2 to 3 inches.
Claim 11
Dependent Claim
28 words
A combination in accordance with claim 7, wherein each said metal section has an arc shape with a radius in the range of about 5 to 6 inches.
Claim 12
Dependent Claim
33 words
A combination in accordance with claim 7, wherein said lagging structure combination has a length in the range of about 3 to 6 feet and a width of approximately 5 to 6 inches.
Claim 13
Dependent Claim
21 words
A combination in accordance with claim 7, wherein said rubber traction material has a thickness of about 0.3 to 0.5 inch.
Claim 14
Dependent Claim
30 words
A combination in accordance with claim 7, wherein said rubber material is vulcanized in the presence of said metal sections to thereby bond said metal sections to said rubber material.
Claim 15
Dependent Claim
135 words
A flexible, replaceable lagging structure combination for attachment to the peripheral surface of a conveyor belt drum pulley, said combination comprising a single length of flexible rubber traction material and two spaced-apart metal sections; wherein each said metal section is arc shaped and is secured to the underside of said length of flexible rubber traction material; wherein adjacent edges of said metal sections are parallel to each other and are separated by a distance in the range of about 0.3 to 0.5 inches; wherein said lagging structure combination has a length of about 3 to 6 feet; and wherein one edge of each said metal section is exposed for welding to said surface of said pulley, and said rubber traction material is disposed above said metal sections and provides a traction surface for said pulley.
Claim 16
Dependent Claim
135 words
A flexible, replaceable lagging structure combination for attachment to the peripheral surface of a conveyor belt drum pulley, said combination comprising a single length of flexible rubber traction material and two spaced-apart metal sections; wherein each said metal section is arc shaped and is secured to the underside of said length of flexible rubber traction material; wherein adjacent edges of said metal sections are parallel to each other and are separated by a distance in the range of about 0.3 to 0.5 inches; wherein said lagging structure combination has a length of about 3 to 6 feet; and wherein one edge of each said metal section is exposed for welding to said surface of said pulley, and said rubber traction material is disposed above said metal sections and provides a traction surface for said pulley.
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) | 1991-01-11 | 1991-07-13 | 1992-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-11 | 1995-07-13 | 1996-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-11 | 1999-07-13 | 2000-01-12 | $7700.00 | Window Closed / Lapsed |