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US 4,231,271 AGranted
Attachment for bolt tightening and removing device
OwnerKeiichi Yamadainventor
Life of this patent
Estimating the term…
Abstract
Attachment for a tightening and removing device of objects such as bolts, nuts and the like, for transmitting the turning force of the device to the objects when disposed in the innermost section of a narrow gap, comprising reaction force receiving means to definitely receive the reaction force generated in the attachment during a fastening and removing operation of the objects when the turning force inputted from the device is transmitted to those objects.
Claims8
An attachment (P1;
- P2) for a tightening and removing device (18;
- 25) for objects such as bolts, nuts and the like, comprising:
- an elongated casing (2;
- 26);
- an input shaft (14;
- 28) journaled at one end of said casing for attaching said tightening and removing device;
- a chain wheel (4) lodged in said casing and formed integrally with said input shaft;
- an output shaft (16;
- 28) journaled at the other end of said casing for attaching a socket (15) that serves to grip the objects;
- a second chain wheel (3) lodged in said casing and formed integrally with said output shaft;
- an endless chain (19) lodged longitudinally in and along said casing for interconnecting said wheels;
- reaction force receiving means (21, 22;
- 33, 39, 44) provided in said casing, said reaction force receiving means (33, 39, 44) including a reaction force receiving lever (44) whose rear end is attached (45) to said casing (26) in such a manner that the free end thereof serves to contact the objects;
- and means (36, 37, 40) for selectively attaching a supporter (39) to said casing (26) and for selectively projecting said reaction force receiving lever (44) to either side of said casing, towards the outside of said output shaft (28), according to the direction in which the reaction force is made to work.
11 more elements
Dependencies are inferred from the claim text.