US3885471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guard assembly for endless flexible drive members
Assignee: Fedco Systems Co
•
Filing: 1974-02-25
•
Granted: 1975-05-27
•
Expires: 1994-02-25
Abstract
Abstract The specification and drawings disclose a guard assembly for belt and chain drives. The assembly is disclosed as a two-part structure adapted to fit about and totally enclose the pulley or sprocket and a substantial length of both the upper and lower runs of the belt or chain. According to the disclosure, the guard assembly is preferably supported at two locations including a first bearing surface which engages the shaft carrying the pulley or sprocket and a second surface which engages the belt or chain. Modifications of the invention are disclosed which permit the guard assembly to be adapted for totally enclosing both sprockets and the upper and lower runs of the belt or chain.
Inventors
- 👤 Richard L Morine
- 👤 James J Hokes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:42
CPC Classifications
F; F16; F16P; F16P1/00; F16P1/02
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
169 words
A guard for drive systems of the type including a shaft mounted, generally circular, rotatable power member about which travels an endless, flexible power transmitting member, said guard comprising: a pair of side wall portions positioned on axially opposite sides of said power member and extending generally parallel thereto, said wall portions having a radial extend greater than the maximum radial extent of said generally circular power member; an opening formed through at least one of said wall portions and sized to receive said shaft, the inner periphery of said opening being defined by a bearing surface which rotatably receives said shaft; a connecting wall portion extending between said side wall portions at a location radially outwardly of said generally circular power member and enclosing the generally circular power member; a second bearing surface carried by said guard and engaging said endless power transmitting member at a location spaced a substantial distance from said generally circular power member; and, an intermediate connector portion extending between said side wall portions.
Claim 2
Dependent Claim
169 words
A guard for drive systems of the type including a shaft mounted, generally circular, rotatable power member about which travels an endless, flexible power transmitting member, said guard comprising: a pair of side wall portions positioned on axially opposite sides of said power member and extending generally parallel thereto, said wall portions having a radial extend greater than the maximum radial extent of said generally circular power member; an opening formed through at least one of said wall portions and sized to receive said shaft, the inner periphery of said opening being defined by a bearing surface which rotatably receives said shaft; a connecting wall portion extending between said side wall portions at a location radially outwardly of said generally circular power member and enclosing the generally circular power member; a second bearing surface carried by said guard and engaging said endless power transmitting member at a location spaced a substantial distance from said generally circular power member; and, an intermediate connector portion extending between said side wall portions.
Claim 3
Dependent Claim
17 words
An improved guard as defined in claim 1 wherein said housing is formed entirely from a plastic.
Claim 4
Dependent Claim
32 words
An improved guard as defined in claim 1 wherein said housing is formed in two sections separable generally along a plane parallel to the plane of rotation of said circular power member.
Claim 5
Dependent Claim
32 words
An improved guard as defined in claim 1 wherein said housing is formed in two sections separable generally along a plane perpendicular to the plane of rotation of said circular power member.
Claim 6
Dependent Claim
22 words
An improved guard as defined in claim 1 wherein said guard is formed in two sections interconnected by manually releasable connecting means.
Claim 7
Dependent Claim
19 words
An improved guard as defined in claim 1 wherein said bearing surfaces are an integral portion of said housing.
Claim 8
Dependent Claim
18 words
The guard as defined in claim 1 wherein said first and second bearing surfaces are formed from plastic.
Claim 9
Dependent Claim
29 words
The guard as defined in claim 1 wherein said housing is prevented from moving axially on said shaft by radially extending interengaging portions on said shaft and said housing.
Claim 10
Dependent Claim
116 words
In a drive system including a pair of shaft mounted, generally circular, rotary power members about which travels an endless flexible power transmitting member, an improved guard assembly comprising: a paiR of housing members substantially totally enclosing each of said circular power members; separate bearing surfaces carried by each of said housings and rotatably receiving the respective shaft of the associated rotary power member, said bearing surfaces each supporting the respective housing; side wall members extending between each of said housing members and releasably connecting said housing members; and, guide means positioned within said housing members and slidably receiving said rotary power members for limiting axial movement of said housing members relative to the associated shaft.
Claim 11
Dependent Claim
116 words
In a drive system including a pair of shaft mounted, generally circular, rotary power members about which travels an endless flexible power transmitting member, an improved guard assembly comprising: a paiR of housing members substantially totally enclosing each of said circular power members; separate bearing surfaces carried by each of said housings and rotatably receiving the respective shaft of the associated rotary power member, said bearing surfaces each supporting the respective housing; side wall members extending between each of said housing members and releasably connecting said housing members; and, guide means positioned within said housing members and slidably receiving said rotary power members for limiting axial movement of said housing members relative to the associated shaft.
Claim 12
Dependent Claim
29 words
The drive system of claim 9 wherein said guide means receive a radial portion of the associated power member, said guide means being releasably mounted within said housing members.
Claim 13
Dependent Claim
31 words
The drive system of claim 9 wherein said guide members include a guide surface for engaging the associated shaft to prevent radial movement of said housings relative to the associated shaft.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |