US 4,114,467 AGranted

Snap-on wear pad

AssigneeRexnord Inc.

InventorVictor D. Petershack

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Abstract

A snap-on wear pad is adapted to be used on conveyor chains. The wear pad includes a resilient, generally cylindrical body portion of a length adapted to fit between the opposite inner side bars of a conveyor chain. The body portion has an axial through hole and an axial entrance slot communicating with the through hole from the outer surface of the body, whereby the body can be snapped onto and resiliently held around the chain roller, bushing, or pin. The wear surface comprises an integral tab portion on the surface of the body opposite the entrance slot, providing an abrasive-resistant sliding surface and means to prevent rotation of the wear pad about the chain roller, bushing, or pin. An alternate construction comprises a composite two-piece wear pad assembly in which identical wear pad halves are similarly snapped onto the chain roller, bushing, or pin from opposite sides to provide a wear surface for both sides of the chain.

Claims12

Dependent claims

A snap-on wear pad adapted to be used on a conveyor chain, said wear pad:

(a) having a main body portion which is in axial length approximately equal to the distance between the side bars of the conveyor chain on which the wear pad is to be used;
(b) having an axial hole clear through the main body portion which is more than semi-circular but less than circular in cross-section and which is sized and shaped to fit snugly around a chain bushing, roller, or pin of the conveyor chain on which the wear pad is to be used;
(c) having an at least generally radial entrance slot which leads from the outer surface of the main body portion of the wear pad to the axial through hole, which extends the axial length of the main body portion, and which is somewhat less wide than the diameter of the chain bushing, roller, or pin which is to fit into the axial hole;
(d) having a tab portion connected to the main body portion opposite to the entrance slot and extending axially outwardly therefrom at a distance beneath the center line of the axial hole not more than the thickness of the side bar, whereby the bar portion prevents the wear pad from rotating about the chain bushing, roller, or pin;
(e) being resilient about a plane passing through the entrance slot and the tab portion, whereby the wear pad can be forced onto and releasably held on the chain bushing, roller, or pin;
and
(f) being wear-resistant on the side opposite to the entrance slot, whereby the portion extending beyond the side bars of the chain during use acts as a wear surface.

4 more elements

A snap-on wear pad adapted to be used on a conveyor chain comprising:

(a) a main body portion having an axial length of approximately half the distance between the side bars of the conveyor chain;
(b) an axial hole through the main body portion which is more than semi-circular but less than circular in cross-section and which is sized and shaped to fit snugly around the conveyor chain bushing;
(c) a generally radial entrance slot leading from the outer surface of the main body portion to the axial through hole, extending the axial length of the main body portion, and being narrower than the diameter of the bushing;
(d) an extended tab portion connected to the main body portion opposite to the entrance slot and extending axially outward therefrom a distance equal to the axial length of the main body plus an amount not more than the thickness of the side bar;
(e) the wear pad being resilient about a plane passing through the entrance slot and the tab portion, whereby the wear pad can be forced onto and releasably held on the chain bushing;
and,
(f) the wear pad having a radial outer surface opposite the entrance slot and extending beyond the chain side bars to provide a wear surface.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 05/746,762Filed 2 Dec 1976
Granted: 19 Sep 1978
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B65G 17/38
Details; Auxiliary devices: chains or like traction elements ; Connections between traction elements and load-carriers
B62D 55/202
Of articulated type, e.g. chains: wheel engaging parts; Wheel guides on links
B65G 21/22
Means incorporated in, or attached to, framework or housings for guiding load-carriers, traction elements or loads supported on moving surfaces:…
B65G 2207/32
Indexing codes relating to constructional details, configuration and additional features of a handling device, e.g. Conveyors: noise prevention…