US4640687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Idler pulley adjuster
Assignee: Individual
•
Filing: 1985-07-02
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Granted: 1987-02-03
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Expires: 2005-07-02
Abstract
Abstract An idler pulley adjustment mechanism for use with a sanding belt tightly wound on three co-planar pulleys includes a means for adjusting one of the pulleys in at least two axes. There is provided a vertical shaft secured to a hanger which is attached to a frame. Below the hanger is a tracking bracket secured to the shaft. The tracking bracket is adjustable by an offset threaded shaft for rotating the corresponding pulley shaft in one axis. A spring biases the tracking bracket relative to the upright frame. A second adjustable member is pivotally attached to the first adjustable member for providing adjustment of the pulley along a second axis perpendicular to the first axis. A set screw extending from the frame pivots the second adjustable member.
Inventors
- 👤 Donald W. MacCarthy, Sr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:47
CPC Classifications
F; F16; F16H; F16H7/00; F16H7/08; F16H7/10; F16H7/12; F16H7/1254; F16H2007/0876; F16H2007/088
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
191 words
A device for adjusting an idler pulley comprising: an upright frame; a first adjustable member rotatably attached to said frame for adjustment about a first axis; a second adjustable member rotatably attached to said first member for adjustment about a second axis substantially perpendicular to the first axis; an idler pulley rotatably supported by said second member on a third axis substantially perpendicular to said first two axes; an elongate flat tracking bracket having a securing screw there through for engaging said first adjustable member to said tracking bracket, said tracking bracket having a projection means extending from its rear; spring means positioned between said main frame and said rear of said tracking bracket and engaging said projection means for biasing said tracking bracket away from said main frame; hanger means attached to said frame having a hole for holding said tracking bracket and said first adjustable means; tracking knob means having a threaded shaft for pivoting said tracking bracket and biasing it towards said main frame; and, screw means having its end projecting from said frame and positioned adjacent to said second adjustable member for pivoting said second adjustable member.
Claim 2
Independent Claim
191 words
A device for adjusting an idler pulley comprising: an upright frame; a first adjustable member rotatably attached to said frame for adjustment about a first axis; a second adjustable member rotatably attached to said first member for adjustment about a second axis substantially perpendicular to the first axis; an idler pulley rotatably supported by said second member on a third axis substantially perpendicular to said first two axes; an elongate flat tracking bracket having a securing screw there through for engaging said first adjustable member to said tracking bracket, said tracking bracket having a projection means extending from its rear; spring means positioned between said main frame and said rear of said tracking bracket and engaging said projection means for biasing said tracking bracket away from said main frame; hanger means attached to said frame having a hole for holding said tracking bracket and said first adjustable means; tracking knob means having a threaded shaft for pivoting said tracking bracket and biasing it towards said main frame; and, screw means having its end projecting from said frame and positioned adjacent to said second adjustable member for pivoting said second adjustable member.
Claim 3
Dependent Claim
41 words
The device as recited in claim 1 wherein said shaft of said tracking knob means is positioned in a threaded bore in said upright frame, said bore being generally horizontal with said projection means and offset from said first adjustable member.
Claim 4
Dependent Claim
22 words
The device as recited in claim 2 wherein said first adjustable member includes a cylindrical bearing section terminating in a threaded shaft.
Claim 5
Dependent Claim
22 words
The device as recited in claim 3 wherein said bearing section cooperates with said hole in said hanger and is rotatable therein.
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) | 1990-02-02 | 1990-08-04 | 1991-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-02-02 | 1994-08-04 | 1995-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-02-02 | 1998-08-04 | 1999-02-03 | $7700.00 | Window Closed / Lapsed |