Belt or chain tensioner for power transmitting system

• US 5,033,992 A
• Filed: 06/29/1990
• Issued: 07/23/1991
• Est. Priority Date: 07/07/1989
• Status: Expired due to Fees

• Current Assignee: NHK Spring Company Limited
• Original Assignee: NHK Spring Company Limited
• Inventors: Ojima, Juji
• Primary Examiner(s): BUIZ, MIKADO RYAN
• Application Number:
  US07/545,503
• Time in Patent Office: 389 Days
• Field of Search: 474/101, 474/109-111, 474/113-117, 474/133, 474/135, 474/136, 474/138
• US Class Current: 474/111
• CPC Class Codes: F16H 2007/081 Torsion springs
• CPC Class Codes: F16H 2007/0878 Disabling during transport
• CPC Class Codes: F16H 2007/0891 Linear path
• CPC Class Codes: F16H 7/08 Means for varying tension of belts, ropes, or chains pulleys of adjustable construction F16H55/52 ; gearings with endless belts F16H7/02; tensioning for chains or belts specially adapted for cycles B62M9/16; belt or chain tensioning arrangements for endless conveyors B65G23/44

Abstract

A belt or chain tensioner provided with a detachable holder for locking an urging tension rod during storage and transport and a slipproof cap provided on the end of the tension rod for abutting against the holder.

Claims

1. A belt or chain tensioner for a power transmitting system having a casing containing a rotational cylinder inserted in a torsion spring, a tension rod engaged with the cylinder a bearing fixed in the casing for restricting rotation of the tension rod, whereby the rotational force of said rotational cylinder can be converted into an axial urging force for said tension rod characterized by comprising;

a holding means detachably mounted on said casing for arresting axial movement of the tension rod by abutting an end of said tension rod; and

a slipproof means provided on said end of said tension rod so as to abut on said holding means.

2. Said tensioner according to claim (1) characterized by said slipproof means comprising a cap of high frictional coefficient mounted on the tension rod.

3. Said tensioner according to claim (1) characterized by said slipproof means comprising a groove formed in the end of the tension rod in parallel with said holding means so as to engage with said holding means.

4. Said tensioner according to claim (1) characterized by the holding means comprising a holder with a projection for engaging with a slot formed in the end of the tension rod.

5. Said tensioner according to claim (1) characterized by the holding means comprising a holder with a slot for engaging with a projection formed on the end of the tension rod.

6. Said tensioner according to claim (1) characterized by the holding means comprising a holder made of strap type material.