US3837291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crane bridge belt drive
Assignee: Lift Tech International Inc
•
Filing: 1972-06-21
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Granted: 1974-09-24
•
Expires: 1992-06-21
Abstract
Abstract Belt drive apparatus for the bridge of an overhead traveling crane. Multi-V belts are driven by a grooved drive sheave coupled to the main drive shaft. The plurality of apices formed by the multi-V-belt engages a grooveless sheave coaxially secured to a crane drive wheel effecting torque transmission by an axially floating drive relation therebetween. The wheels, in turn, ride on a runway beam defining a track over which bridge travel is to be effected.
Inventors
- 👤 M Umlor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:20
CPC Classifications
B; B66; B66C; B66C9/00; B66C9/14; B61; B61C; B61C13/00; B61C13/04; B66C9/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
124 words
In an overhead conveying apparatus for travel on a runway track support, drive means comprising in combination: a. motor means having an output drive shaft; b. a pair of spaced-apart drive wheels mounted on said conveying apparatus in drive tracking engagement with said track support; c. drive sheave means operatively connected to said motor output shaft; d. driven sheave means operatively connected to each of said drive wheels and having a substantially smooth belt drive surface thereon; and e. V-belt means having a V-faced driving surface which transmit driving force from the drive surface of said drive sheave means to said driven sheave means by at least one apex of said V-face of said belt means bearing against said substantially smooth drive surface thereof.
Claim 2
Dependent Claim
124 words
In an overhead conveying apparatus for travel on a runway track support, drive means comprising in combination: a. motor means having an output drive shaft; b. a pair of spaced-apart drive wheels mounted on said conveying apparatus in drive tracking engagement with said track support; c. drive sheave means operatively connected to said motor output shaft; d. driven sheave means operatively connected to each of said drive wheels and having a substantially smooth belt drive surface thereon; and e. V-belt means having a V-faced driving surface which transmit driving force from the drive surface of said drive sheave means to said driven sheave means by at least one apex of said V-face of said belt means bearing against said substantially smooth drive surface thereof.
Claim 3
Dependent Claim
34 words
In an overhead conveying apparatus according to claim 1 in which the drive surface of said drive sheave has a predetermined axial extent for accommodating anticipated deflection in the alignment of said runway support.
Claim 4
Dependent Claim
42 words
In an overhead conveying apparatus according to claim 2 in which said drive sheave means comprises a grooved surface sheave of smaller diameter than Said driven sheave and of width greater than said belt means to facilitate spacing adjustment of said wheels.
Claim 5
Dependent Claim
47 words
In an overhead conveying apparatus according to claim 1 in which said conveying apparatus comprises the bridge of an overhead traveling crane, said track support comprises a pair of spaced-apart runway beams and said drive means is duplicated for a driving engagement with each of said beams.
Claim 6
Dependent Claim
23 words
In an overhead conveying apparatus according to claim 4 including adjustable tensioning means for presetting a desired tension level of said V-belt means.
Claim 7
Dependent Claim
24 words
In an overhead conveying apparatus according to claim 5 in which said tensioning means comprises an idler roller spring loaded against said belt means.
Claim 8
Dependent Claim
30 words
In an overhead conveying apparatus according to claim 4 in which said V-belt means comprises an endless belt having a plurality of parallel juxtaposed V-grooves on its drive transmitting surface.
Claim 9
Dependent Claim
27 words
In an overhead conveying apparatus according to claim 7 in which the belt drive surface of said driven sheave is engaged by the apices of said V-grooves.
Claim 10
Dependent Claim
27 words
In an overhead conveying apparatus according to claim 8 in which said drive wheels extend cantilever supported from said conveying apparatus for maintaining said drive tracking engagement.
Claim 11
Dependent Claim
23 words
In an overhead conveying apparatus according to claim 9 including adjustable tensioning means for presetting a desired tension level of said V-belt means.
Claim 12
Dependent Claim
24 words
In an overhead conveying apparatus according to claim 10 in which said tensioning means comprises an idler roller spring loaded against said belt means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |