Ratcheting driver with pivoting pawls and method of arranging same
View Patent ↗A ratcheting driver for rotationally driving a piece and having a handle and pivotal pawls engageable with a driven gear and being capable of ratcheting and driving in both rotational directions. A cap is rotatable relative to said handle and it has a web for pivoting the pawls out of engagement with the gear. Through the selective rotation of the cap, the setting of the pawls is established. A spring positions the pawls in driving positions, and the cap has surfaces which disengage the pawls from the gear upon rotation of the cap. A method of arranging the driver is included.
1. A ratcheting driver for rotationally driving a piece, comprising:
a handle having a longitudinal axis and a hollow interior,
a gear shaft with gear teeth thereon and being rotatably supported along said axis in said handle hollow interior for rotational drive of the piece,
two pawls pivotally supported by said handle adjacent said shaft and being orbital about said axis upon and with rotation of said handle and with each of said pawls having teeth engageable with said gear teeth at a respective location on said gear teeth for transmitting rotation from said handle to the piece,
a spring operative on said pawls for pivoting said pawls and thereby yieldingly urge said pawls into rotational driving tooth engagement with said gear teeth,
means effective on said pawls for selectively pivoting said pawls out of rotational driving tooth engagement with said gear teeth, and
said handle having two surfaces spaced apart from each other and disposed adjacent to each of said pawls and with each of said pawls having two spaced-apart surfaces in respective sliding contact with said handle surfaces in the pivoting of said pawls and with all said handle surfaces being disposed to face said location for supporting said pawls in the teeth engagement of said pawls with said gear teeth at said location and for urging said pawls to orbit about said axis, and to thereby present forces on said pawls and said shaft to secure said pawls in tooth engaged position and to thereby urge rotation of said shaft about said axis.
2. The ratcheting driver for rotationally driving a piece, as claimed in claim 1 , wherein:
each of said pawls have a pivot axis and said handle surfaces are arcuate in a concave shape and are centered on said pivot axis.
3. The ratcheting driver for rotationally driving a piece, as claimed in claim 2 , wherein:
said pawl surfaces are arcuate in a convex shape about said pivot axis for the pivotal sliding contact with said handle concave surfaces.
4. The ratcheting driver for rotationally driving a piece, as claimed in claim 1 , wherein:
said pawls in a view thereof along said pivot axis present said spaced-apart surfaces which with said location and the force thereat, and all of said forces, thereby present a triangular pattern of forces on each of said pawls.
5. The ratcheting driver for rotationally driving a piece, as claimed in claim 1 , including:
a cap rotatably supported by said handle and presenting said means to said pawls.
6. The ratcheting driver for rotationally driving a piece, as claimed in claim 5 , including:
said gear teeth disposed to face radially outward from said axis to thereby present exterior gear teeth,
a web on said cap extending radially inward to between said pawls for pivoting said pawls upon rotation of said cap for lifting said pawls off said gear teeth for tooth disengagement from said gear teeth.
7. The ratcheting driver for rotationally driving a piece, as claimed in claim 6 , including:
one of said pawls being axially movable relative to said handle, and
a spring axially urging said one pawl into interference position relative to the rotation of said cap for trapping said web between said pawls and thereby limiting the rotation of said cap.
8. The ratcheting driver for rotationally driving a piece, as claimed in claim 7 , including:
an access opening in said cap through which said one pawl can be depressed against said spring for releasing said cap from limited rotation relative to said pawls.
9. The ratcheting driver for rotationally driving a piece, as claimed in claim 1 , wherein:
said shaft extends axially beyond said gear teeth for rotation support of said shaft in both directions along said axis and from said gear teeth.
10. A ratcheting driver for rotationally driving a piece, comprising:
a handle having a longitudinal axis and a hollow interior and having two pawl receiving pockets with two spaced apart surfaces defined by each of said pockets and with said handle having two pivot axes at respective ones of said pockets,
a gear shaft with gear teeth thereon and being rotatably supported along said axis in said handle hollow interior and having provision for engaging the piece for rotation with said shaft,
two pawls pivotally supported by said handle at respective ones of said pivot axes and adjacent said shaft and being orbital about said longitudinal axis upon and with rotation of said handle and with each of said pawls having teeth engageable with said gear teeth at a respective location on said gear teeth for transmitting rotation from said handle to the piece,
at least two lobes spaced apart from each other and projecting on each of said pawls for and providing pivotal support of said two pawls at respective ones of said pivot axes and relative to said handle and with said lobes being in respective slidable contact with said handle spaced apart surfaces for urging said pawls to orbit about said axis and thereby urge rotation of said shaft about said longitudinal axis and whereby each of said pawl lobes has a surface in sliding contact with respective said pocket surfaces for force transmission relative to said handle,
a spring operative on said pawls for pivoting said pawls and thereby yieldingly urge said pawls into rotational driving tooth engagement with said gear teeth, and
means effective on said pawls for selectively pivoting said pawls out of rotational driving tooth engagement with said gear teeth.
11. The ratcheting driver for rotationally driving a piece, as claimed in claim 10 , wherein:
said lobe surfaces on each of said pawls are disposed in an axial view of said pawls to present with said location, a triangular pattern of forces on each of said pawls.
12. The ratcheting driver for rotationally driving a piece, as claimed in claim 10 , wherein:
one of said lobes serves as a fulcrum in the pivoting of said pawls.
13. The ratcheting driver for rotationally driving a piece, as claimed in claim 10 , including:
two pockets under the control of said handle for receiving said two pawls and with said pockets being shaped similar to the shape of said pawls for confining the pivotal movement of said pawls in all directions radially of said axis.
14. The ratcheting driver for rotationally driving a piece, as claimed in claim 10 , including:
a cap rotatably supported by said handle and having an end wall and a rim encircling said wall, and
said means is a web on said cap extending radially from said rim to said circumference and said web being positioned whereby rotation of said cap in one direction will pivot said pawls for work piece driving rotation of said shaft in said one direction.
15. A ratcheting driver for rotationally driving a piece, comprising:
a handle having a longitudinal axis and a hollow interior,
a gear shaft with a gear tooth circumference and having gear teeth on said circumference and with said shaft being rotatably supported along said axis in said handle hollow interior and in rotation drive relationship with the piece for rotation with said shaft,
two pawls pivotally supported by said handle adjacent said shaft and being orbital about said axis upon and with rotation of said handle and with each of said pawls having teeth engageable with said gear teeth at a respective location on said gear teeth circumference for transmitting rotation from said handle to the piece,
a spring operative on said pawls for pivoting said pawls and thereby yieldingly urge said pawls into rotational driving tooth engagement with said gear teeth, and
means disposed at said shaft gear tooth circumference for contacting said pawls for selectively pivoting said pawls out of rotational driving tooth engagement with said gear teeth and with said means being adjacent said shaft and extending to within the axial projection of said circumference of said gear teeth.
16. The ratcheting driver for rotationally driving a piece, as claimed in claim 15 , wherein:
said means has a shape in a view along said axis wherein said means presents a largest portion thereof at said circumference compared to a portion radially spaced from said circumference to thereby have said largest portion move under said pawls for camming said pawls out of tooth engagement with said gear teeth.
17. The ratcheting driver for rotationally driving a piece, as claimed in claim 16 , wherein:
said shape of said means in the axial view is that of a trapezoid.
18. The ratcheting driver for rotationally driving a piece, as claimed in claim 16 , wherein:
said shape of said means in the axial view is pear shaped.
19. The ratcheting driver for rotationally driving a piece, as claimed in claim 16 , including:
a cap rotatably supported by said handle and having an end wall and a rim encircling said wall,
said means is a web on said cap extending radially from said rim to said circumference.
20. A ratcheting driver for rotationally driving a piece, comprising:
a handle having a longitudinal axis and a hollow interior,
a gear shaft with a gear tooth and with said shaft being rotatably supported along said axis in said handle hollow interior and having provision for engaging the piece for rotation with said shaft,
two pawls spaced-apart pivotally supported by said handle adjacent said shaft and being orbital about said axis upon and with rotation of said handle and with each of said pawls having a fulcrum portion and an end portion on each side of said fulcrum portion,
a first one of said end portions having teeth engageable with said gear teeth for transmitting rotation from said handle to the piece,
a spring operative on said pawls at a second one of said end portions for pivoting said pawls and thereby yieldingly urge said pawls into rotational driving tooth engagement with said gear teeth, and
a cap rotatably supported by said handle and having web means extending radially inward into the space between said pawls and said web means being in camming engagement with said pawls upon rotation of said cap to thereby pivot said pawls out of engagement with said gear teeth.
21. The ratcheting driver for rotationally driving a piece, as claimed in claim 20 , including:
two pockets supported by said handle for pivotally receiving said pawls and there being formations supported on said handle and defining said pockets for transmitting orbital action to said pawls from said handle.
22. The ratcheting driver for rotationally driving a piece, as claimed in claim 21 , wherein:
said pawls project axially from said pockets for camming engagement with said means.
23. The ratcheting driver for rotationally driving a piece, as claimed in claim 20 , wherein:
said web means presents two surfaces faced away from each other and respectively toward a respective one of said pawls for camming on said pawls.
24. A ratcheting driver for rotationally driving a piece, comprising:
a handle having a longitudinal axis and a hollow interior,
a gear shaft with gear teeth thereon and being rotatably supported along said axis in said handle hollow interior for rotational drive of the piece,
two pawls pivotally supported by said handle adjacent said shaft and being orbital about said axis upon and with rotation of said handle and with each of said pawls having teeth engageable with said gear teeth at a respective location on said gear teeth for transmitting rotation from said handle to the piece,
a spring operative on said pawls for pivoting said pawls and thereby yieldingly urge said pawls into rotational driving tooth engagement with said gear teeth,
means effective on said pawls for selectively pivoting said pawls out of rotational driving tooth engagement with said gear teeth,
two surfaces supported by said handle and with each of said pawls having two spaced-apart surfaces in respective sliding contact with said handle surfaces and with said handle surfaces being disposed to face said location for supporting said pawls in the teeth engagement of said pawls with said gear teeth at said location and for urging said pawls to orbit about said axis and thereby urge rotation of said shaft about said axis,
said gear teeth disposed to face radially outward from said axis to thereby present exterior gear teeth,
a web on said cap extending radially inward to between said pawls for pivoting said pawls upon rotation of said cap for lifting said pawls off said gear teeth for tooth disengagement from said gear teeth,
one of said pawls being axially movable relative to said handle, and
a spring axially urging said one pawl into interference position relative to the rotation of said cap for trapping said web between said pawls and thereby limiting the rotation of said cap.
25. The ratcheting driver for rotationally driving a piece, as claimed in claim 24 , including:
an access opening in said cap through which said one pawl can be depressed against said spring for releasing said cap from limited rotation relative to said pawls.
26. A ratcheting driver for rotationally driving a piece, comprising:
a handle having a longitudinal axis and a hollow interior,
a gear shaft with gear teeth thereon and being rotatably supported along said axis in said handle hollow interior for rotational drive of the piece,
two pawls pivotally supported by said handle adjacent said shaft and being orbital about said axis upon and with rotation of said handle and with each of said pawls having teeth engageable with said gear teeth at a respective location on said gear teeth for transmitting rotation from said handle to the piece,
a spring operative on said pawls for pivoting said pawls and thereby yieldingly urge said pawls into rotational driving tooth engagement with said gear teeth,
means effective on said pawls for selectively pivoting said pawls out of rotational driving tooth engagement with said gear teeth,
said handle having two surfaces spaced apart from each other and disposed adjacent to each of said pawls and with each of said pawls and having two spaced-apart surfaces in respective sliding contact with said handle surfaces in the pivoting of said pawls and with all said handle surfaces being disposed to face said location for supporting said pawls in the teeth engagement of said pawls with said gear teeth at said location and for urging said pawls to orbit about said axis, and to thereby present forces on said pawls and said shaft to secure said pawls in tooth engaged position and to thereby urge rotation of said shaft about said axis, and
said pawls have a shape in a view of said pawls along said pivot axis to present said spaced-apart surfaces which with said location and the force thereat, and with all of said forces, thereby present a triangular pattern of forces on each of said pawls for forcing said pawls toward said location.
27. A ratcheting driver for rotationally driving a piece, comprising:
a handle having a longitudinal axis and a hollow interior and having two pawl receiving pockets with two spaced apart surfaces defined by each of said pockets and with said handle having two pivot axes at respective ones of said pockets,
a gear shaft with gear teeth thereon and being rotatably supported along said axis in said handle hollow interior and having provision for engaging the piece for rotation with said shaft,
two pawls pivotally supported by said handle at respective ones of said pivot axes and adjacent said shaft and being orbital about said longitudinal axis upon and with rotation of said handle and with each of said pawls having teeth engageable with said gear teeth at a respective location on said gear teeth for transmitting rotation from said handle to the piece,
at least two lobes spaced apart from each other and projecting on each of said pawls for and providing pivotal support of said two pawls at respective ones of said pivot axes and relative to said handle and with said lobes being in respective slidable contact with said handle spaced-apart surfaces for urging said pawls to orbit about said axis and with each of said pawl lobes has a surface in sliding contact with a respective one of said pocket surfaces to thereby urge rotation of said shaft about said longitudinal axis for force transmission relative to said handle,
said lobe surfaces on each of said pawls are disposed in an axial view of said pawls to present, with said location, a triangular pattern of forces on each of said pawls,
a spring operative on said pawls for pivoting said pawls and thereby yieldingly urge said pawls into rotational driving tooth engagement with said gear teeth, and
means effective on said pawls for selectively pivoting said pawls out of rotational driving tooth engagement with said gear teeth.
28. A ratcheting driver for rotationally driving a piece, comprising:
a handle having a longitudinal axis and a hollow interior,
a gear shaft with gear teeth thereon and being rotatably supported along said axis in said handle hollow interior for rotational drive of the piece,
two pawls pivotally supported by said handle adjacent said shaft and being orbital about said axis upon and with rotation of said handle and with each of said pawls having teeth engageable with said gear teeth at a respective location on said gear teeth for transmitting rotation from said handle to the piece,
a spring operative on said pawls for pivoting said pawls and thereby yieldingly urge said pawls into rotational driving tooth engagement with said gear teeth,
a cap rotatably supported by said handle for selectively pivoting said pawls out of rotational driving tooth engagement with said gear teeth,
said gear teeth disposed to face radially outward from said axis to thereby present exterior gear teeth,
a web on said cap extending radially inward to between said pawls for pivoting said pawls upon rotation of said cap for lifting said pawls off said gear teeth for tooth disengagement from said gear teeth,
one of said pawls being axially movable relative to said handle,
a spring axially urging said one pawl into interference position relative to the rotation of said cap for trapping said web between said pawls and thereby limiting the rotation of said cap, and
said handle having two surfaces spaced apart from each other and disposed adjacent to each of said pawls and with each of said pawls having two spaced-apart surfaces in respective sliding contact with said handle surfaces in the pivoting of said pawls and with all said handle surfaces being disposed to face said location for supporting said pawls in the teeth engagement of said pawls with said gear teeth at said location and for urging said pawls to orbit about said axis, and to thereby present forces on said pawls and said shaft to secure said pawls in tooth engaged position and to thereby urge rotation of said shaft about said axis.
29. The ratcheting driver for rotationally driving a piece, as claimed in claim 28 , including:
an access opening in said cap through which said one pawl can be depressed against said spring for releasing said cap from limited rotation relative to said pawls.