Tunneling machine rotatable member

Details Tunneling machine rotatable member Tunneling machine rotatable member

Category

E - Fixed Constructions

Subcategory

21

Subsubcategory

B

CPC

262/77

IPC codes

E21B 10/12 (2006.01) E21B 10/22 (2006.01) E21C 25/16 (2006.01) E21D 9/10 (2006.01) F16C 19/38 (2006.01) F16C 25/06 (2006.01) F16C 35/07 (2006.01) F16C 43/04 (2006.01)

Type

Patent

Patent number

CA 1276948

Description

Applicant: Tyman H. Fikse Title: Adjustable Pressure Bearings and Retainer for Cutting Rims of Cutters for Tunneling Machines ABSTRACT Twin combined radial-and thrust antifriction bearings in a mounting for a rotatable member, such as a tunneling cutterhead or a tunneling cutter, can be tightened or preloaded by pressing spaced bearing races against a spacer ring therebetween to contract the spacer ring. Alternatively, the rotatable member may be a cutter composed of a rim mounted on a hub having an external circumferential groove extending partially under the base of such rim by a retaining ring received in such groove and having portions thereof staked beneath the rim to anchor the retaining ring in place. The cutting rim may be of generally equilateral triangle cross section having opposite base angles clipped to provide narrow parallel walls and the apex being truncated to provide a crest included angle of 80 degrees to 100 degrees. The slant slides of the cutting rim are concave to enable the apex of the rim to ha sharpened more effectively.

Application Number

530068

Affiliated with

Also associated with

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