US3563364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable conveyor
Assignee: Enviri Corp
•
Filing: 1969-02-07
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Granted: 1971-02-16
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Expires: 1989-02-07
Abstract
Abstract In an improved conveyor of the type including an elongated conveyor-carrying boom pivotally mounted at one end to a wheeled supporting frame, with the other end of the boom being supported by an arm pivotally mounted adjacent the other end of the frame, with a sheave-carrying arm pivotally mounted adjacent the said other end of the support frame, and with a cable passing over the sheave and connected at one end to the support arm and at its other end to an hydraulic cylinder, the sheave arm and support arm are positioned such that the ratio of the reaction force acting on the support arm to the moment arm lying between the support arm pivot point and the point the cable passes over the sheave remains substantially equal for any given position of the conveyor boom. Such a conveyor additionally preferably includes means for adjusting the length of the aforesaid moment arm such that the same structural elements may be employed for booms of varying length.
Inventors
- 👤 Charles J Arndt
- 👤 Glen Ellyn
- 👤 Roy F Lopresti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:52
CPC Classifications
B; B65; B65G; B65G41/00; B65G41/001; B65G41/002
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
196 words
Supporting apparatus for a conveyor for concrete mix and the like comprising: a support frame; a conveyor support boom pivotally mounted on the support frame adjacent one end thereof, the other end of the boom being free; a support arm pivotally mounted at one end adjacent the other end of the support frame, the other end of the support arm being adapted to support the free end of the conveyor support boom; a sheave arm pivotally mounted o at one end about a pivot point adjacent the other end of the support frame; a sheave pivotally mounted at the other end of the sheave arm; and cable means fixed at one end to the support arm and at the other end to means for moving the cable means, with the cable means being passed over the sheave; the sheave arm and support arm being relatively positioned such that the ratio of the reaction force acting on the support arm to the moment arm lying between the point at which the cable passes over the sheave and the pivot point of the support arm is substantially equal for any given pivotal position of the conveyor support boom.
Claim 2
Dependent Claim
196 words
Supporting apparatus for a conveyor for concrete mix and the like comprising: a support frame; a conveyor support boom pivotally mounted on the support frame adjacent one end thereof, the other end of the boom being free; a support arm pivotally mounted at one end adjacent the other end of the support frame, the other end of the support arm being adapted to support the free end of the conveyor support boom; a sheave arm pivotally mounted o at one end about a pivot point adjacent the other end of the support frame; a sheave pivotally mounted at the other end of the sheave arm; and cable means fixed at one end to the support arm and at the other end to means for moving the cable means, with the cable means being passed over the sheave; the sheave arm and support arm being relatively positioned such that the ratio of the reaction force acting on the support arm to the moment arm lying between the point at which the cable passes over the sheave and the pivot point of the support arm is substantially equal for any given pivotal position of the conveyor support boom.
Claim 3
Dependent Claim
40 words
Supporting apparatus, as claimed in claim 1, wherein the conveyor support boom comprises a main section and a tail section, with the sections being telescopically mounted end-to-end whereby to adjust the tension of a conveyor belt carried by said boom.
Claim 4
Dependent Claim
35 words
Supporting apparatus, as claimed in claim 2, wherein the length of the conveyor support boom is increased by the provision of at least one extension section interposed between the main section and the tail section.
Claim 5
Dependent Claim
34 words
Supporting apparatus, as claimed in claim 3, wherein the length of the support frame is increased by the provision of a support frame extension member for each boom extension section in excess of one.
Claim 6
Dependent Claim
63 words
Supporting apparatus, as claimed in claim 4, wherein the position of the pivot point for the sheave arm is adjustable in order to lengthen the said moment arm whereby, for a conveyor support boom of a given length, the ratio of the said reaction force to the said moment arm remains substantially equal for any given pivotal position of the conveyor support boom.
Claim 7
Dependent Claim
28 words
Supporting apparatus, as claimed in claim 1, and further comprising antifriction means provided at the other end of the support arm on which the conveyor support boom rests.
Claim 8
Dependent Claim
64 words
Supporting apparatus, as claimed in claim 1, wherein the support frame comprises: a plurality of rotatably mounted wheels, with at least one of the wheels being driven by a chain driven by an hydraulic motor; and an adjustable telescopic mounting for the hydraulic motor for adjusting the tension of the chain drive by varying the relative position between the hydraulic motor and the wheel.
Claim 9
Dependent Claim
122 words
Supporting apparatus, as claimed in claim 1, and further comprising cradle means pivotally mounted on the support frame adjacent the said other end thereof and adapted to provide a support for the conveyor support boom when the conveyor support boom is disposed in a lowered, rest position, the said cradle means including at least one longitudinally disposed V-shaped angle generalLy positioned beneath the conveyor support boom, with at least one generally cylindrical member being mounted beneath the conveyor support boom and generally in longitudinal alignment with a corresponding V-shaped angle, whereby when the conveyor support boom is pivoted downwardly toward its rest position, each cylindrical member cooperates with the corresponding V-shaped angle to self-center the conveyor support boom on the cradle means.
Claim 10
Dependent Claim
17 words
Supporting apparatus, as claimed in claim 8, wherein the cradle means comprises a pair of V-shaped angles.
Claim 11
Dependent Claim
34 words
Supporting apparatus, as claimed in claim 8, wherein the pivotal mounting for the cradle means is adjustable whereby the cradle means may be disposed in different positions for conveyor support booms of different lengths.
Claim 12
Dependent Claim
111 words
Supporting apparatus, as claimed in claim 1, wherein the conveyor support boom comprises: a power-driven drive roller disposed at one end of the conveyor support boom; a main idler roller disposed at the other end of the conveyor support boom; a plurality of upper V-shaped idler roller assemblies removably mounted on the conveyor support boom; a plurality of lower idler roller assemblies mounted on the conveyor support boom; and an endless conveyor belt disposed about the main idler roller and the drive roller; with the upper train of the belt being supported by the V-shaped idler roller assemblies, and the lower train thereof being supported by the lower idler roller assemblies.
Claim 13
Dependent Claim
179 words
In a supporting apparatus for a conveyor comprising a support frame; a conveyor support boom pivotally mounted adjacent one end of the support frame, with the other end of the boom being free; a support arm pivotally mounted adjacent the other end of the support frame; a sheave arm pivotally mounted at one end about a pivot point adjacent the other end of the support frame; a sheave pivotally mounted on the other end of the sheave arm; and a cable fixed at one end to the support arm and at the other end to means for moving the cable, with the cable being passed over the sheave, the improvement comprising the pivot point for the support arm being positioned relative to the pivot point for the sheave arm such that the ratio of the reaction force acting on the support arm to the moment arm lying between the point at which the cable passes over the sheave and the pivot point of the support arm is substantially equal for any given potential position of the conveyor support boom.
Claim 14
Dependent Claim
179 words
In a supporting apparatus for a conveyor comprising a support frame; a conveyor support boom pivotally mounted adjacent one end of the support frame, with the other end of the boom being free; a support arm pivotally mounted adjacent the other end of the support frame; a sheave arm pivotally mounted at one end about a pivot point adjacent the other end of the support frame; a sheave pivotally mounted on the other end of the sheave arm; and a cable fixed at one end to the support arm and at the other end to means for moving the cable, with the cable being passed over the sheave, the improvement comprising the pivot point for the support arm being positioned relative to the pivot point for the sheave arm such that the ratio of the reaction force acting on the support arm to the moment arm lying between the point at which the cable passes over the sheave and the pivot point of the support arm is substantially equal for any given potential position of the conveyor support boom.
Claim 15
Dependent Claim
41 words
The improvement, as claimed in claim 12, wherein the conveyor support boom comprises a main section and a tail section, with the sections being telescopically mounted end-to-end whereby to adjust the tension of a conveyor belt carried a by said boom.
Claim 16
Dependent Claim
34 words
The improvement, claimed in claim 13, wherein the length of the conveyor support boom is increased by the provision of at least one extension section interposed between the main section and the tail section.
Claim 17
Dependent Claim
34 words
An improvement, as claimed in claim 14, wherein the length of the support frame is increased by the provision of a support frame extension member for each boom extension section in excess of one.
Claim 18
Dependent Claim
63 words
An improvement, as claimed in claim 15, wherein the position of the pivot point for the sheave arm is adjustable in order to lengthen the said moment arm whereby, for a conveyor support boom of a given length, the ratio of the said reaction force to the said moment arm remains substantially equal for any given pivotal position of the conveyor support boom.
References Cited (Backward Citations)
US676504A
Cited
US1750855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |