Portable power operated tool

• US 4,179,805 A
• Filed: 05/05/1978
• Issued: 12/25/1979
• Est. Priority Date: 06/07/1977
• Status: Expired due to Term

• Current Assignee: Yamada Machinery Industrial Co., Ltd.
• Original Assignee: Yamada Machinery Industrial Co., Ltd.
• Inventors: Yamada, Sakuji
• Primary Examiner(s): Peters, Jimmy C.
• Application Number:
  US05/903,084
• Time in Patent Office: 599 Days
• Field of Search: 30/296 R, 30/198, 30/276, 30/309, 172/41, 56/12.7, 30/122, 30/166
• US Class Current: 30/122
• CPC Class Codes: A01D 34/902 Ergonomic provisions
• CPC Class Codes: B27B 17/0008 Means for carrying the chain saw, e.g. handles B27B17/0033 takes precedence

Abstract

A portable power operated tool for cutting brush, mowing grass and the like which comprises a cutting implement mounted at one end of an elongated tubular housing and driven by a lightweight engine connected to the other end of the tubular housing, a fixing element for receiving and fixing a front part of an operator'"'"'s right arm, the fixing element being located in position near the engine and along with one side of the elongated tubular housing, a first handle located in front of the fixing element, and a second handle located in front of the first handle and connected to the tubular housing.

Claims

1. A portable power operated tool which comprises

an elongated tubular housing,

an engine mounted to one end of said tubular housing,

a cutting implement mounted to the other end of said tubular housing,

a drive shaft which passes through said tubular housing for transmitting power from said engine to said cutting implement,

a fixing element for receiving and fixing a front part of an operator'"'"'s arm,

said fixing element being located in position near said engine and along with one side of said elongated tubular housing,

a first handle located in front of and spaced from said fixing element,

a handle grip connected to said first handle and disposed on the same side with said fixing element, and

a second handle located in front of and spaced from said first handle.

2. The portable power operated tool as defined in claim 1, wherein

said fixing element has a substantially inverted U-shaped configuration having two vertical side walls and a top wall.

3. The portable power operated tool as defined in claim 1, wherein

said fixing element is made of rigid material, and

an inner layer member made of flexible material is provided with internal surface of said fixing element.

4. The portable power operated tool as defined in claim 2, wherein

said fixing element includes a fastening band connected at its one end to one of said vertical side walls of the fixing element, and

a free end of said band is detachable to the other of said vertical side walls of the fixing element.

5. The portable power operated tool as defined in claim 1, wherein

said fixing element includes a vertical metal plate,

an upper band connected at one end to an upper portion of said metal plate,

a lower band connected at one end to a lower portion of said metal plate, and

a fastening means adapted to connect free ends of said upper and lower bands together.

6. The portable power operated tool as defined in claim 1, wherein

said fixing element is supported by a tubular slide member which is slidably mounted on said elongated tubular housing.

7. The portable power operated tool as defined in claim 6, wherein

said fixing element is pivotally supported by a support pin which is secured to and extends at right angles from said tubular slide member.

8. The portable power operated tool as defined in claim 1, wherein

said fixing element is supported by a supporting arm which extends in substantially parallel with said elongated tubular housing.

9. The portable power operated tool as defined in claim 8, wherein

said fixing element is pivotally supported by a support pin which is secured to and extends at right angles from said supporting arm.

10. The portable power operated tool as defined in claim 8, wherein

said supporting arm is secured at its one end to one side of said engine.

11. The portable power operated tool as defined in claim 8, wherein

said supporting arm is connected to and supported by a slide member which is slidably mounted on said elongated tubular housing.

12. The portable power operated tool as defined in claim 11, wherein

said supporting arm is pivotally supported at forward end thereof by said slide member via an extension which extends horizontally and transversely from said slide member,

said fixing element being mounted to a rear end of said supporting arm, and

said first handle is connected to a slide member which is slidably mounted on said supporting arm.

13. The portable power operated tool as defined in claim 12, which includes

a resilient means adapted to normally urge said supporting arm downwardly, and

an upper and a lower hooks provided at free end of said supporting arm so as to restrict pivotal movement of said supporting arm.

14. The portable power operated tool as defined in claim 12, wherein

a disk member with dents is secured to said extension, and

a claw is pivotally connected via a support pin to a forward end portion of said supporting arm so as to be selectively engageable with said dents for locking the supporting arm at a desired position.

15. The portable power operated tool as defined in claim 11, wherein

said supporting arm is pivotally connected at its midportion to said slide member mounted on said elongated tubular housing,

said supporting arm having at its rear end said fixing element mounted thereon and having at its forward end said first handle connected thereto,

a coil spring adapted to normally urge said rear end of the supporting arm downwardly, and

an extension extending horizontally from said supporting arm so as to be engageable with underside of said supporting arm.

16. The portable power operated tool as defined in claim 1, which includes

a vertical hollow member having an open top end and a bottom end wall and supported by said slide member mounted on said elongated tubular housing,

a vertical slide piece partically disposed within said hollow member so as to be resiliently movable up and down by means of at least one coil spring interposed between a lower end of said slide piece and said bottom wall, and

said coil spring being arranged so as to normally urge said slide piece downwardly, and

said fixing element being supported by said slide piece.

17. The portable power operated tool as defined in claim 1, wherein

said cutting implement is a rotary saw blade.

18. The portable power operated tool as defined in claim 1, wherein

said cutting implement is an endless chain saw.