US4040303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two mass vibratory material handling apparatus and methods of manufacturing and fine tuning the same
Assignee: FMC Corp
•
Filing: 1975-09-05
•
Granted: 1977-08-09
•
Expires: 1995-09-05
Abstract
Abstract A two mass vibratory material handling apparatus has a first mass that includes a vibration exciter of the rotary eccentric weight type and a second mass that includes an object to be vibrated. The two masses are interconnected by resilient elements designed to permit a desired vibration amplification from the vibration exciter to the object to be vibrated. The vibration exciter has a drive with an adjustable drive ratio located between a fixed r.p.m. at full voltage motor drive shaft and a shaft that rotatably supports eccentric weights. Variable pitch pulleys or a set of pulleys having various pitch diameters and provided so that pitch diameters can be selected therefrom for mounting one pulley on each shaft with a drive belt trained about the pulleys and thus, provide a drive ratio enabling the fixed frequency motor to drive the eccentric weights at a selected operating frequency. The resilient elements can be designed to amplify vibration along a predetermined line of attack or to flex in that direction while amplifying vibration perpendicularly thereto or to provide a combination of such vibration amplifications to impart an elliptical motion to the second mass. The apparatus can be manufactured without undue care in maintaining a designed spring rate for the resilient elements or maintaining the designed weight of the two masses since after manufacture and assembly, the apparatus can be fine tuned by weighing the two masses, measuring the amplitude of vibration of the mass including the object to be vibrated at a known frequency, selecting an operating frequency for obtaining a desired vibration stroke, and adjusting the drive ratio to operate at that frequency.
Inventors
- 👤 Shinobu Makino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:47
CPC Classifications
B; B65; B65G; B65G27/00; B65G27/10; B65G27/16; B65G27/18; B06; B06B; B06B1/00; B06B1/10; B06B1/16; B06B1/161; B07; B07B; B07B1/00; B07B1/42; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18344
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
266 words
A two mass vibratory material handling apparatus comprising a first mass, a second mass, and a plurality of resilient elements that interconnect the first and second masses, said first mass including a vibration exciter of the rotary eccentric weight type with an adjustable drive for driving the vibration exciter, said drive including a fixed r.p.m. at full voltage motor with a drive shaft extending therefrom, a driven rotary eccentric weight shaft extending from the exciter, a pulley on the drive shaft of the fixed r.p.m. at full voltage motor, a pulley on the driven rotary eccentric weight shaft, and a drive belt trained about the pulleys, said adjustable drive including means for adjusting the drive ratio of the pulleys to enable the fixed r.p.m. at full voltage motor to drive the driven rotary eccentric weight shaft at a selected operating frequency, said second mass including a trough for supporting an object to be vibrated within the trough, said second mass together with the object to be vibrated being subject to variations in weight, said resilient elements providing the sole support for said first mass, said resilient elements having fixed spring rates that influence the natural frequency of vibration for the apparatus in predetermined directions from the vibration exciter to the object to be vibrated, said resilient elements interconnecting the first and second masses including a plurality of steel coil springs located between the vibration exciter and the second mass, said coil springs being aligned longitudinally in a direction parallel with a predetermined line of attack and having a length to mean diameter ratio greater than three.
Claim 2
Dependent Claim
266 words
A two mass vibratory material handling apparatus comprising a first mass, a second mass, and a plurality of resilient elements that interconnect the first and second masses, said first mass including a vibration exciter of the rotary eccentric weight type with an adjustable drive for driving the vibration exciter, said drive including a fixed r.p.m. at full voltage motor with a drive shaft extending therefrom, a driven rotary eccentric weight shaft extending from the exciter, a pulley on the drive shaft of the fixed r.p.m. at full voltage motor, a pulley on the driven rotary eccentric weight shaft, and a drive belt trained about the pulleys, said adjustable drive including means for adjusting the drive ratio of the pulleys to enable the fixed r.p.m. at full voltage motor to drive the driven rotary eccentric weight shaft at a selected operating frequency, said second mass including a trough for supporting an object to be vibrated within the trough, said second mass together with the object to be vibrated being subject to variations in weight, said resilient elements providing the sole support for said first mass, said resilient elements having fixed spring rates that influence the natural frequency of vibration for the apparatus in predetermined directions from the vibration exciter to the object to be vibrated, said resilient elements interconnecting the first and second masses including a plurality of steel coil springs located between the vibration exciter and the second mass, said coil springs being aligned longitudinally in a direction parallel with a predetermined line of attack and having a length to mean diameter ratio greater than three.
Claim 3
Dependent Claim
258 words
A two mass vibratory material handling apparatus comprising a first mass, a second mass, and a plurality of resilient elements that interconnect the first and second masses, said first drive including a vibration exciter of the rotary eccentric type with an adjustable drive for driving the vibration exciter, said drive including a fixed r.p.m. at full voltage motor with the drive shaft extending therefrom, a driven rotary eccentric weight shaft extending from the exciter, a pulley on the drive shaft of the fixed r.p.m. at full voltage motor, a pulley on the driven rotary eccentric weight shaft and a drive belt trained about the pulleys, said adjustable drive including means for adjusting the drive ratio of the pulleys to enable the fixed r.p.m. at full voltage motor to drive the driven rotary eccentric shaft at a selected operating frequency, said second mass including a trough for supporting an object to be vibrated within the trough, said second mass together with the object to be vibrated being subject to variations in weight, said resilient elements providing the sole support for said first mass, said reslient elements having fixed spring rates that influence the natural frequency of vibration for the apparatus in predetermined directions from the vibration exciter to the object to be vibrated, said resilient elements interconnecting the first and second masses including a plurality of leaf springs arranged to flex in a direction along a predetermined line of attack and to provide a substantially rigid coupling between the masses in a direction perpendicular to the line of attack.
Claim 4
Dependent Claim
258 words
A two mass vibratory material handling apparatus comprising a first mass, a second mass, and a plurality of resilient elements that interconnect the first and second masses, said first drive including a vibration exciter of the rotary eccentric type with an adjustable drive for driving the vibration exciter, said drive including a fixed r.p.m. at full voltage motor with the drive shaft extending therefrom, a driven rotary eccentric weight shaft extending from the exciter, a pulley on the drive shaft of the fixed r.p.m. at full voltage motor, a pulley on the driven rotary eccentric weight shaft and a drive belt trained about the pulleys, said adjustable drive including means for adjusting the drive ratio of the pulleys to enable the fixed r.p.m. at full voltage motor to drive the driven rotary eccentric shaft at a selected operating frequency, said second mass including a trough for supporting an object to be vibrated within the trough, said second mass together with the object to be vibrated being subject to variations in weight, said resilient elements providing the sole support for said first mass, said reslient elements having fixed spring rates that influence the natural frequency of vibration for the apparatus in predetermined directions from the vibration exciter to the object to be vibrated, said resilient elements interconnecting the first and second masses including a plurality of leaf springs arranged to flex in a direction along a predetermined line of attack and to provide a substantially rigid coupling between the masses in a direction perpendicular to the line of attack.
Claim 5
Dependent Claim
246 words
A two mass vibratory material handling apparatus comprising a first mass, a second mass, and a plurality of resilient elements that interconnect the first and second masses, said first mass including a vibration exciter of the rotary eccentric weight type with an adjustable drive for driving the vibration exciter, said drive including a fixed r.p.m. at full voltage motor with a drive shaft extending therefrom, a driven rotary eccentric weight shaft extending from the exciter, a pulley on the drive shaft of the fixed r.p.m. at full voltage motor, a pulley on the driven rotary eccentric weight shaft, and a drive belt trained about the pulleys, said adjustable drive including means for adjusting the drive ratio of the pulleys to enable the fixed r.p.m. at full voltage motor to drive the driven rotary eccentric weight shaft at a selected operating frequency, said second mass including a trough for supporting an object to be vibrated within the trough, said second mass together with the object to be vibrated being subject to variations in weight, said resilient elements providing the sole support for said first mass, said resilient elements having fixed spring rates that influence the natural frequency of vibration for the apparatus in predetermined directions from the vibration exciter to the object to be vibrated, said resilient elements including a combination of leaf springs arranged to flex in a direction along a predetermined line of attack and steel coil springs aligned longitudinally along the line of attack.
Claim 6
Dependent Claim
246 words
A two mass vibratory material handling apparatus comprising a first mass, a second mass, and a plurality of resilient elements that interconnect the first and second masses, said first mass including a vibration exciter of the rotary eccentric weight type with an adjustable drive for driving the vibration exciter, said drive including a fixed r.p.m. at full voltage motor with a drive shaft extending therefrom, a driven rotary eccentric weight shaft extending from the exciter, a pulley on the drive shaft of the fixed r.p.m. at full voltage motor, a pulley on the driven rotary eccentric weight shaft, and a drive belt trained about the pulleys, said adjustable drive including means for adjusting the drive ratio of the pulleys to enable the fixed r.p.m. at full voltage motor to drive the driven rotary eccentric weight shaft at a selected operating frequency, said second mass including a trough for supporting an object to be vibrated within the trough, said second mass together with the object to be vibrated being subject to variations in weight, said resilient elements providing the sole support for said first mass, said resilient elements having fixed spring rates that influence the natural frequency of vibration for the apparatus in predetermined directions from the vibration exciter to the object to be vibrated, said resilient elements including a combination of leaf springs arranged to flex in a direction along a predetermined line of attack and steel coil springs aligned longitudinally along the line of attack.
Claim 7
Dependent Claim
246 words
A two mass vibratory material handling apparatus comprising a first mass, a second mass, and a plurality of resilient elements that interconnect the first and second masses, said first mass including a vibration exciter of the rotary eccentric weight type with an adjustable drive for driving the vibration exciter, said drive including a fixed r.p.m. at full voltage motor with a drive shaft extending therefrom, a driven rotary eccentric weight shaft extending from the exciter, a pulley on the drive shaft of the fixed r.p.m. at full voltage motor, a pulley on the driven rotary eccentric weight shaft, and a drive belt trained about the pulleys, said adjustable drive including means for adjusting the drive ratio of the pulleys to enable the fixed r.p.m. at full voltage motor to drive the driven rotary eccentric weight shaft at a selected operating frequency, said second mass including a trough for supporting an object to be vibrated within the trough, said second mass together with the object to be vibrated being subject to variations in weight, said resilient elements providing the sole support for said first mass, said resilient elements having fixed spring rates that influence the natural frequency of vibration for the apparatus in predetermined directions from the vibration exciter to the object to be vibrated, said resilient elements including a combination of leaf springs arranged to flex in a direction along a predetermined line of attack and rubber compression springs aligned longitudinally along the line of attack.
Claim 8
Dependent Claim
246 words
A two mass vibratory material handling apparatus comprising a first mass, a second mass, and a plurality of resilient elements that interconnect the first and second masses, said first mass including a vibration exciter of the rotary eccentric weight type with an adjustable drive for driving the vibration exciter, said drive including a fixed r.p.m. at full voltage motor with a drive shaft extending therefrom, a driven rotary eccentric weight shaft extending from the exciter, a pulley on the drive shaft of the fixed r.p.m. at full voltage motor, a pulley on the driven rotary eccentric weight shaft, and a drive belt trained about the pulleys, said adjustable drive including means for adjusting the drive ratio of the pulleys to enable the fixed r.p.m. at full voltage motor to drive the driven rotary eccentric weight shaft at a selected operating frequency, said second mass including a trough for supporting an object to be vibrated within the trough, said second mass together with the object to be vibrated being subject to variations in weight, said resilient elements providing the sole support for said first mass, said resilient elements having fixed spring rates that influence the natural frequency of vibration for the apparatus in predetermined directions from the vibration exciter to the object to be vibrated, said resilient elements including a combination of leaf springs arranged to flex in a direction along a predetermined line of attack and rubber compression springs aligned longitudinally along the line of attack.
References Cited (Backward Citations)
US2133593A
Cited
US3040591A
Cited
US2984339A
Cited
US3089582A
Cited
US3387499A
Cited
US3682254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |