Tools – Wrench – screwdriver – or driver therefor – Handle clutched to head
Patent
1999-03-12
2000-08-29
Scherbel, David A.
Tools
Wrench, screwdriver, or driver therefor
Handle clutched to head
81 60, B25B 1346
Patent
active
061091413
ABSTRACT:
A biasing structure for maintaining a pawl in engagement with a toothed gear of a ratchet wrench is provided. The structure includes an elongated plunger having an axis, a pawl engagement end, a spring insertion portion having a free end, a central portion connecting the engagement end to the spring insertion portion, and an annular first shoulder having a shoulder diameter formed between the spring insertion portion and the central portion. The spring insertion portion is tapered from a maximum diameter at the first shoulder to a minimum diameter at the free end. The structure also includes a compression spring coupled to the plunger assembly and having a plurality of coils, wherein at least one of the coils has a diameter less than the shoulder diameter and is disposed about the central portion. A reversible ratchet wrench having a pawl and using the biasing structure is also provided.
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Snap-on Sealed Ratchet Repair Instructions, Form ZRKS6/3, printed in Jan. 1991.
Scherbel David A.
Shakeri Hadi
Snap-on Tools Company
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