Roller conveyor system having speed control

• US 4,168,771 A
• Filed: 10/07/1977
• Issued: 09/25/1979
• Est. Priority Date: 10/07/1977
• Status: Expired due to Term

• Current Assignee: Rexnord Corporation
• Original Assignee: Rexnord Corporation
• Inventors: Krivec, Bert
• Primary Examiner(s): Nase, Jeffrey V.
• Application Number:
  US05/840,208
• Time in Patent Office: 718 Days
• Field of Search: 193/35 A, 193/37, 152/153, 152/246, 152/321, 152/326
• US Class Current: 193/35.00A
• CPC Class Codes: B65G 13/075 Braking means
• CPC Class Codes: B65G 39/02 Adaptations of individual rollers and supports therefor
• CPC Class Codes: Y10T 152/10477 Perforated

Abstract

A free wheeling tire having the ability to resist increased rotational speed under load is comprised of a hub portion, rim portion, and a multiplicity of flexure members defining voids extending continuously from one side of the tire to another. Deleterious heat generated during operation is successfully dissipated through the increased surface area provided by the voids and by the nature of geometrical element configuration. The tires are placed in a gravity roller conveyor in arrays where each array may have different speed control characteristics permitting variations in speeds of objects as they move from one array to another.

Claims

1. A gravity conveyor comprising

(a) support means

(b) a first group of wheels mounted for free rotation on axles secured to said support means,

(c) a second group of wheels mounted for free rotation on axles secured to said support means,

(d) said wheels in first and second groups further including:

(1) a hub contacting portion adapted to be secured to a hub for rotation about an axis;

(2) a rim portion; and

(3) a multiplicity of flexure members having a predetermined resiliency value extending from said hub portion to said rim portion, said flexure members defined continuous voids extending from one side of said wheel to the other and deforming under load,

said wheels of the first group have flexure members having an angle of inclination different from the second group, said wheels in the first and second groups, having total resilience sufficient to provide a first and second terminal speeds, respectively, to an object moving thereover when the surfaces defined by the wheels of the respective groups of wheels have the same angle with respect to the horizontal plane.

2. The gravity conveyor of claim 1 in which the surface defined by the wheels of the first group is at an angle to the surface defined by the wheels of the second group such that the objects moving thereover move at the same speed irrespective of location of the conveyor.