Patent US3921793A successfully refreshed from Google Patents.
US3921793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reversible belt tensioning system
Assignee: Individual
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Filing: 1974-07-08
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Granted: 1975-11-25
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Expires: 1994-07-08
Abstract
Abstract A reversible belt tensioning system for releasably securing an endless belt to a roller mechanism. A pair of toggle actuation mechanisms longitudinally displace a pair of bearing block mechanisms. The bearing block mechanisms are connected to a roller which frictionally engages the endless belt during normal operation. Actuation of the toggle mechanisms which are fixedly mounted to a stationary frame member, longitudinally displace the bearing block mechanisms and roller mechanism to a forward position where the roller frictionally engages the endless belt. Release of the toggle mechanisms drives the roller to a rearward position in response to an associated movement of the bearing block mechanisms to release the belt from contact with the roller.
Inventors
- 👤 Richard H Hutchinson
- 👤 Executrix By Claire Hutchinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:41
CPC Classifications
B; B65; B65G; B65G23/00; B65G23/44; F; F16; F16H; F16H7/00; F16H7/08; F16H2007/0889; F16H2007/0891
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
350 words
A reversible belt tensioning system for releasably securing an endless belt to a rotational roller, comprising: a. a frame member having a pair of transversely displaced side walls extending in a longitudinal direction normal said transverse displacement; b. toggle actuation means mounted to said frame member, said toggle actuation means fastened to said bearing block means for linearly displacing said bearing block means in said longitudinal direction, said toggle actuation means including: 1. a toggle frame rigidly secured to said mounting means within a longitudinally directed channel formed within said mounting means; 2. linkage actuation means pivotally fastened to said toggle frame, said linkage actuation means including, a. a rotational lever having a first and second pivot point, said lever being rotational in a plane coincident with said longitudinal direction, said lever being pivotally mounted to said toggle frame at said first pivot point; and, b. a bar link pivotally mounted to said rotational lever second pivot point on a first end thereof and to said toggle displacement means on a second end thereof, said bar link for converting rotational motion of said rotational lever to longitudinal motion of said displacement means; and 3. toggle displacement means slidably moveable in restrained linear longitudinal motion with respect to said toggle frame, said toggle displacement means being connected on opposing ends thereof to said linkage actuation means and said bearing block means respectively, and including adjustment means for maintaining a predetermined longitudinal displacement between said toggle frame member and said bearing block means; and, c. bearing block means moveable with respect to said frame member in said longitudinal direction said bearing block means secured to said rotational roller for displacement of said roller in said longitudinal direction responsive to said movement of said bearing block means, said bearing block means being longitudinally aligned with said toggle frame and being slidably moveable within said channel of said mounting means; and d. means for mounting said bearing block means and said toggle actuation means to said frame member said bearing block means being moveable in said longitudinal direction with respect to said mounting means.
Claim 2
Dependent Claim
350 words
A reversible belt tensioning system for releasably securing an endless belt to a rotational roller, comprising: a. a frame member having a pair of transversely displaced side walls extending in a longitudinal direction normal said transverse displacement; b. toggle actuation means mounted to said frame member, said toggle actuation means fastened to said bearing block means for linearly displacing said bearing block means in said longitudinal direction, said toggle actuation means including: 1. a toggle frame rigidly secured to said mounting means within a longitudinally directed channel formed within said mounting means; 2. linkage actuation means pivotally fastened to said toggle frame, said linkage actuation means including, a. a rotational lever having a first and second pivot point, said lever being rotational in a plane coincident with said longitudinal direction, said lever being pivotally mounted to said toggle frame at said first pivot point; and, b. a bar link pivotally mounted to said rotational lever second pivot point on a first end thereof and to said toggle displacement means on a second end thereof, said bar link for converting rotational motion of said rotational lever to longitudinal motion of said displacement means; and 3. toggle displacement means slidably moveable in restrained linear longitudinal motion with respect to said toggle frame, said toggle displacement means being connected on opposing ends thereof to said linkage actuation means and said bearing block means respectively, and including adjustment means for maintaining a predetermined longitudinal displacement between said toggle frame member and said bearing block means; and, c. bearing block means moveable with respect to said frame member in said longitudinal direction said bearing block means secured to said rotational roller for displacement of said roller in said longitudinal direction responsive to said movement of said bearing block means, said bearing block means being longitudinally aligned with said toggle frame and being slidably moveable within said channel of said mounting means; and d. means for mounting said bearing block means and said toggle actuation means to said frame member said bearing block means being moveable in said longitudinal direction with respect to said mounting means.
Claim 3
Dependent Claim
100 words
linkage actuation means pivotally fastened to said toggle frame, said linkage actuation means including, a. a rotational lever having a first and second pivot point, said lever being rotational in a plane coincident with said longitudinal direction, said lever being pivotally mounted to said toggle frame at said first pivot point; and, b. a bar link pivotally mounted to said rotational lever second pivot point on a first end thereof and to said toggle displacement means on a second end thereof, said bar link for converting rotational motion of said rotational lever to longitudinal motion of said displacement means; and
Claim 4
Dependent Claim
100 words
linkage actuation means pivotally fastened to said toggle frame, said linkage actuation means including, a. a rotational lever having a first and second pivot point, said lever being rotational in a plane coincident with said longitudinal direction, said lever being pivotally mounted to said toggle frame at said first pivot point; and, b. a bar link pivotally mounted to said rotational lever second pivot point on a first end thereof and to said toggle displacement means on a second end thereof, said bar link for converting rotational motion of said rotational lever to longitudinal motion of said displacement means; and
Claim 5
Dependent Claim
21 words
The reversible belt tensioning system as recited in claim 1 wherein said elongated element threadedly engages said shaft member second end.
Claim 6
Dependent Claim
35 words
The reversible belt tensioning system as recited in claim 2 wherein said elongated element is fastened to a restraining plate of said bearing block means, said elongated element being releasable secured to said restraining plate.
Claim 7
Dependent Claim
156 words
toggle displacement means slidably moveable in restrained linear longitudinal motion with respect to said toggle frame, said toggle displacement means being connected on opposing ends thereof to said linkage actuation means and said bearing block means respectively, and including adjustment means for maintaining a predetermined longitudinal displacement between said toggle frame member and said bearing block means; and, c. bearing block means moveable with respect to said frame member in said longitudinal direction said bearing block means secured to said rotational roller for displacement of said roller in said longitudinal direction responsive to said movement of said bearing block means, said bearing block means being longitudinally aligned with said toggle frame and being slidably moveable within said channel of said mounting means; and d. means for mounting said bearing block means and said toggle actuation means to said frame member said bearing block means being moveable in said longitudinal direction with respect to said mounting means.
Claim 8
Dependent Claim
156 words
toggle displacement means slidably moveable in restrained linear longitudinal motion with respect to said toggle frame, said toggle displacement means being connected on opposing ends thereof to said linkage actuation means and said bearing block means respectively, and including adjustment means for maintaining a predetermined longitudinal displacement between said toggle frame member and said bearing block means; and, c. bearing block means moveable with respect to said frame member in said longitudinal direction said bearing block means secured to said rotational roller for displacement of said roller in said longitudinal direction responsive to said movement of said bearing block means, said bearing block means being longitudinally aligned with said toggle frame and being slidably moveable within said channel of said mounting means; and d. means for mounting said bearing block means and said toggle actuation means to said frame member said bearing block means being moveable in said longitudinal direction with respect to said mounting means.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |