Title -Wood Chipper Disc and Knife Mounting

6
United States Patent‘ 11113,s42,302 I [72] Inventor Frank Louis Salzmann,Jr. [56] References Cited _ Lomb YE. W. 40. 80X \ UNITED STATES P TENTS [2]] A I No gggmgg?hm’Alab m 5208 2,712,904 7/1955 Dnrkee 144/1 76X [22] riigd Sept’ 11, 1968 3,000,578 9/1961 Rlches e t a l 241/92 [45] Patented Nov. 24’ 1970 3,144,995 8/1964 Fontarne 241/298 Primary Examiner-Donald R . Schran . Attorney-Lawrence L . Colbert [54] WOOD I-IIPPER DISC AND KNIFE MOUNTING 6 Claims, 4 Drawing Figs. [521 ‘1.8. CI- 241/298; ABSTRACT; A chipper disc assembly wherein {he chipper 144/ 76. 144/2 8; 241/92 knives are very securely held to withstand the constant pound [51] Int. C l 302C 7/12; ing o f the log and readily replaceable wear plate segments are . B27g 13/08 provided between adjacent knives o n the disc, rendering [50] Field OfSQII‘CIl I44/I76, maintenance economical and reducing the need for knife a d 162, 218, 219; 241/298, 296, 92 justment.

Transcript of Title -Wood Chipper Disc and Knife Mounting

Page 1: Title -Wood Chipper Disc and Knife Mounting

7/25/2019 Title -Wood Chipper Disc and Knife Mounting

http://slidepdf.com/reader/full/title-wood-chipper-disc-and-knife-mounting 1/5

United States Patent‘

1 1 1 1 3 , s 4 2 , 3 0 2

[ 7 2 ]

I n v e n t o r

F r a n k

L o u i s

S a l z m a n n , J r .

[ 5 6 ] R e f e r e n c e s C i t e d

Lomb

Y E .

W. 4 0 . 80X \

UNITED

STATES P TENTS

[ 2 ] ] A I

No

gggmgg?hm’Alab m 5 2 0 8 2 , 7 1 2 , 9 0 4

7 / 1 9 5 5

D n r k e e

1 4 4 / 1

76X

[ 2 2 ]

r i i g d S e p t ’ 1 1 ,

1 9 6 8

3 , 0 0 0 , 5 7 8

9 / 1 9 6 1

R l c h e s e t

a l

2 4 1 / 9 2

[ 4 5 ] P a t e n t e d Nov. 2 4 ’

1970

3 , 1 4 4 , 9 9 5 8 / 1 9 6 4 F o n t a r n e 241/298

P r i m a r y

E x a m i n e r - D o n a l d R . S c h r a n

Attorney-Lawrence L . Colbert

[ 5 4 ]

WOOD I - I I P P E R DISC AND KNIFE MOUNTING

6 C l a i m s , 4

D r a w i n g

F i g s .

[ 5 2 1 ‘ 1 . 8 . C I -

2 4 1 / 2 9 8 ;

ABSTRACT;

A c h i p p e r

d i s c a s s e m b l y w h e r e i n { h e

c h i p p e r

1 4 4 / 7 6 . 1 4 4 / 2

8 ;

2 4 1 / 9 2 k n i v e s

a r e

v e r y s e c u r e l y h e l d t o w i t h s t a n d t h e c o n s t a n t p o u n d

[ 5 1 ]

I n t . C l 3 0 2 C

7 / 1 2 ; i n g o f t h e

l o g a n d

r e a d i l y r e p l a c e a b l e

w e a r

p l a t e

s e g m e n t s

a r e

B27g

1 3 / 0 8 p r o v i d e d b e t w e e n a d j a c e n t k n i v e s o n t h e d i s c , r e n d e r i n g

[ 5 0 ] F i e l d O f S Q I I ‘ C I l I 4 4 / I 7 6 , maintenance economical an d r e d u c i n g

t h e

need f o r k n i f e ad

1 6 2 ,

2 1 8 , 2 1 9 ; 2 4 1 / 2 9 8 ,

2 9 6 ,

9 2

j u s t m e n t .

Page 2: Title -Wood Chipper Disc and Knife Mounting

7/25/2019 Title -Wood Chipper Disc and Knife Mounting

http://slidepdf.com/reader/full/title-wood-chipper-disc-and-knife-mounting 2/5

Page 3: Title -Wood Chipper Disc and Knife Mounting

7/25/2019 Title -Wood Chipper Disc and Knife Mounting

http://slidepdf.com/reader/full/title-wood-chipper-disc-and-knife-mounting 3/5

3 542 302

a t e n t e d

N o v . 2 4 , 1 9 7 0

2 of2

h e e t

Page 4: Title -Wood Chipper Disc and Knife Mounting

7/25/2019 Title -Wood Chipper Disc and Knife Mounting

http://slidepdf.com/reader/full/title-wood-chipper-disc-and-knife-mounting 4/5

l

WOOD HIPPER DISC AND KNIFE MOUNTING

D i s c

t y p e wood c h i p p e r s

f o r

r e d u c i n g l o g s a n d

t h e l i k e

t o

u s a b l e c h i p s f o r t h e

p a p e r

p u l p i n d u s t r y a r e q u i t e

w e l l k n o w n .

E x a m p l e s o f s u c h m a c h i n e s ‘ a r e s h o w n

i n p r i o r

US.

P a t .

N o s .

1 , 9 0 6 , 4 8 6 ;

2 , 7 1 2 , 9 0 4 ;

3 , 1 4 4 , 9 9 5 a n d

3 , 2 9 7 , 0 6 7 .

W h i l e

g e n e r a l l y

s u c c e s s f u l , s u c h m a c h i n e s h a v e

s u f f e r e d

f r o m

c e r t a i n d e f i c i e n c i e s

n o t a b l y

i n

‘ c o n n e c t i o n

w i t h t h e

m o u n t i n g o f t h e

c h i p p i n g k n i v e s

o n

t h e

h e a v y

r o t a r y s t e e l

o r

c a s t i r o n d i s c w h i c h c o n s t i t u t e s

t h e

h e a r t

o f

t h e

c h i p p i n g

machine _

I t

h a s

p r o v e n v e r y d i f f i c u l t t o c l a m p t h e c h i p p e r k n i v e s

s e c u r e l y

t o

w i t h s t a n d t h e

h e a v y p o u n d i n g

i n h e r e n t i n t h e

c h i p p i n g o p e r a t i o n

a n d t o

m i n i m i z e

t h e

n e e d

f o r

f r e q u e n t

k n i f e t i g h t e n i n g a n d a d j u s t m e n t f A t t e m p t s t o

i m p r o v e

t h i s

s i t u a t i o n h a v e

r e s u l t e d i n

s t r u c t u r e s w h i c h ‘ a r e u n d u l y com

p l i c a t e d

a n d r e q u i r e c o m p l e x m a c h i n i n g

a n d i n c r e a s e d

num

b e r s o r

p a r t s w h i c h c a n n o t b e

j u s t i f i e d

e c o n o m i c a l l y .

The p r e s e n t i n v e n t i o n

a i m s t o

overcome

t h e s e

p r i o r a r t

d e

f e c t s t h r o u g h t h e p r o v i s i o n o f a g r e a t l y i m p r o v e d c h i p p i n g

k n i f e m o u n t i n g a n d c a r r i e r d i s c w h i c h

i s e x t r e m e l y s t u r d y a n d

d u r a b l e , r e l a t i v e l y

s i m p l i f i e d

i n c o n s t r u c t i o n a n d h a v i n g

means

t o accommodate t h e e x c e s s i v e

wear c a u s e d

b y t h e

en

g a g e m e n t

o f

t h e l o g

w i t h

t h e d i s c d u r i n g r o t a t i o n

o f t h e

l a t t e r .

BRIEF DESCRIPTION OF THE DRAWINGS

F I G . 1

i s

a s i d e e l e v a t i o n o f

a

c h i p p e r d i s c a s s e m b l y em

bodying t h e i n v e n t i o n .

F I G . 2

i s a n

e n l a r g e d

f r a g m e n t a r y v e r t i c a l

s e c t i o n

t a k e n on

t h e line2 -2 of FIG. 1 .

F I G . 3

i s a f r a g m e n t a r y e x p l o d e d p e r s p e c t i v e v i e w o f o n e

c h i p p e r

k n i f e

m o u n t i n g a n d a s s o c i a t e d

e l e m e n t s .

F I G . 4

i s a

d i a g r a m m a t i c e x p l o d e d p e r s p e c t i v e v i e w o f

a

wood c h i p p i n g m a c h i n e o f t h e

t y p e e m b o d y i n g

t h e i n v e n t i o n .

DESCRIPTION

OF

THE PREFERRED EMBODIMENT

R e f e r r i n g

t o

t h e

d r a w i n g s w h e r e i n

l i k e

n u m e r a l s d e s i g n a t e

l i k e p a r t s , t h e n u m e r a l 1 0

d e s i g n a t e s

t h e m a c h i n e b a s e a n d

l o w e r

h o u s i n g s e c t i o n , t h e c o m p a n i o n t o p c o v e r 1 1

b e i n g

s h o w n

s e p a r a t e d

f r o m

t h e

b a s e

i n F I G . 4 a n d c a r r y i n g t h e

wood

c h i p d i s c h a r g e d u c t

1 2 .

The u s u a l l o g i n f e e d

s p o u t 1 3 i s

c a r r i e d

b y one s i d e

o f

t h e b a s e 1 0 a n d

t h e c u t t i n g

d i s c a s

s e m b l y 1 4 t o

w h i c h t h e p r e s e n t

i n v e n t i o n

i s

s p e c i f i c a l l y

d i r e c t e d i s

mounted o n

a main

r o t a r y

s h a f t s u p p o r t e d b y t h e

b a s e 1 0 .

The

a b o v e g e n e r a l o r g a n i z a t i o n

i s

c o n v e n t i o n a l a s d e

p i c t e d i n a n y o f s a i d

p r i o r p a t e n t s a n d

n e e d n o t b e d e a l t w i t h

i n

further

detail herein. ‘

The c h i p p e r

k n i f e

d i s c a s s e m b l y 1 4 i n c l u d e s

a

d i s c b o d y 1 5

o f s t e e l o r t h e l i k e

h a v i n g

p l u r a l

c i r c u m f e r e n t i a l l y

e q u i d i s t a n t l y s p a c e d c h i p s l o t s 1 6

f o r m e d

t h e r e t h r o u g h .

Ad

j a c e n t

o n e

s i d e

o f

e a c h s l o t 1 6 , t h e d i s c

b o d y

1 5 i s p r o v i d e d i n

o n e f a c e

w i t h a

r e l a t i v e l y deep

s q u a r e

c o r n e r e d r e c e s s 1 7 f o r

t h e a c c o m m o d a t i o n o f

a k n i f e h o l d e r 1 8 , k n i f e c l a m p

1 9 ,

c h i p p e r k n i f e 2 0 a n d c o u n t e r k n i f e 2 1 .

The

e l e m e n t s 1 8

t h r o u g h

2 1

a r e s e c u r e l y s e a t e d

i n a s s e m b l e d

r e l a t i o n s h i p

on

t h e

s l i g h t l y s l a n t i n g

b o t t o m

f a c e o f t h e r e c e s s

1 7

a n d a r e main

t a i n e d

r i g i d l y s e c u r e d t o

t h e

d i s c

b o d y

1 5 b y

means

o f

A l l e n

screws 22 or l i k e fasteners.

I t s h o u l d b e

m e n t i o n e d

h e r e t h a t t h e

number

o f s l o t s 1 6

a n d

c h i p p e r k n i f e a s s e m b l i e s h a v e b e e n s h o w n

i n

t h e d r a w i n g s a s ‘

t h e p r e f e r r e d a r r a n g e m e n t b u t t h i s

number

s n o t c r i t i c a l a n d

i n some i n s t a n c e s t h e

number

may be

s m a l l e r

o r g r e a t e r .

R e f e r r i n g p a r t i c u l a r l y

t o

F I G S . 2

a n d

3 , e a c h k n i f e

a s s e m b l y

h a s i t s h o l d e r 1 8 r e c e s s e d

t o

p r o v i d e

s t e p p e d p a r a l l e l s e a t i n g

f a c e s 2 3

a n d

2 4 f o r t h e a f o r e m e n t i o n e d k n i v e s 2 0

a n d 2 1

whose

o p p o s e d

f a c e s a r e

a l s o

i n

c o n t a c t i n g

r e l a t i o n a s

shown

i n F I G . 2 . The h o l d e r 1 8 f u r t h e r i n c l u d e s

s t e p p e d

s h o u l d e r s 2 5

a n d 2 6

a t

r i g h t

a n g l e s

t o

t h e

s e a t i n g

f a c e s

2 3 a n d

2 4 , a g a i n s t

w h i c h a d j u s t i n g

s c r e w

s t o p s 27 n t h e r e a r

e d g e s

o f t h e k n i v e s

2 0 a n d

2 1

a b u t .

T h i s

a l l o w s t h e

c h i p p e r a n d c o u n t e r

k n i v e s

20

a n d

2 1

t o

b e a d j u s t e d

f o r

p r o p e r c u t t i n g

e n g a g e m e n t w i t h

t h e

l o g

a n d

s u b s t a n t i a l l y

l o c k e d a f t e r

a d j u s t m e n t .

Theclamp 1 9

o f

g e n e r a l l y t r i a n g u l a r c o n ? g u r a t i o n h a s a

d i a g o n a l f a c e

2 8

c o n t a c t i n g t h e c h i p p e r

k n i f e 2 0

o v e r

s u b s t a n

3 , 5 4 2 , 3 0 2

1 0

2 5

3 5

4 5

2

t i a l l y

t h e

u p p e r s i d e

o f

t h e l a t t e r

f o r

s e c u r i t y . A n o t h e r s u b s t a n

t i a l l y r i g h t a n g u l a r f a c e 2 9

o f

t h e c l a m p c o n t a c t s t h e

s h o u l d e r

2 6 o f

t h e

h o l d e r

1 8 ,

a n d

when t h e

f a s t e n e r s 2 2

a r e t i g h t e n e d

u p , a v e r y s e c u r e g r i p p i n g a n d w e d g i n g a c t i o n i s p r o v i d e d b y

t h e

c l a m p

1 9 a g a i n s t t h e

k n i v e s

2 0

a n d 2 1 a n d t h e u n d e r l y i n g

h o l d e r

1 8 .

A d d i t i o n a l l y ’ ,

t h e h o l d e r

1 8 i s f i r m l y a n c h o r e d

i n

i t s

r e c e s s

1 7 .

As b e s t shown n F I G . 3 , t h e r e a r e d g e s o f k n i v e s 2 0 a n d 2 1

a r e

n o t c h e d

a t

30

and

3 1

t o p r o v i d e c l e a r a n c e f o r t h e A l l e n

s c r e w s 2 2

w h i c h

e x t e n d t h r o u g h t h e a s s e m b l a g e

o f

p a r t s

i n

F I G . 2

a n d

i n t o s c r e w - t h r e ad e d o p e n i n g s p r o v i d e d i n

t h e

d i s c

b o d y

1 5 .

A s

s h o w n

i n F I G . 2 , t h e c u t t i n g

l e a d i n g

e d g e 3 2 o f c h i p p e r

k n i f e 2 0 p r o j e c t s

a b o u t o n e - h a l f

t h e d i s t a n c e a c r o s s t h e

c h i p

s l o t

1 6

and s a n g l e d t o

d e l i v e r

t h e c h i p s

t h r o u g h

t h i s

s l o t

s o

t h a t t h e y may e n t e r

t h e

h o u s i n g a n d p a s s t h r o u g h t h e o u t l e t

1 2 .

An

i m p o r t a n t f e a t u r e o f t h e i n v e n t i o n

r e s i d e s

i n

t h e

p r o v i

s i o n

o f s e p a r a t e f i l l e r

a n d

w e a r p l a t e s e g m e n t s

3 3

a n d

3 4

b e t w e e n e a c h

c i r c u m f e r e n t i a l l y

s p a c e d p a i r

o f

k n i f e a s s e m

b l i e s a n d s l o t s o f t h e d i s c b o d y . E a c h s u p e r p o s e d

p a i r

o f

? l t e r

a n d

w e a r

p l a t e s i s

f i r m l y a n c h o r e d

t o

t h e

d i s c

b o d y

1 5 b y

r e c e s s e d A l l e n

s c r e w s 35 o r

b y s i m i l a r

means whereby t h e

o u t e r

f a c e s o f t h e

wear

l a t e s 34 i e i n a common

p l a n e

s l i g h t l y

b e l o w

t h e

c u t t i n g e d g e s 3 2

o f t h e

c h i p p e r k n i v e s .

A s

s h o w n ,

t h e p l a t e s 3 3

a n d

3 4

c o n s t i t u t e

e q u a l l y - s i z e d s e g m e n t s

o f a

c i r

c l e a n d a r e

s h a p e d l i k e ‘ p i e

s l i c e s . T h e y e f f e c t i v e l y

c o v e r s u b

s t a n t i a l l y

t h e

e n t i r e

s u r f a c e

o f

t h e

d i s c b o d y

o n

t h e

s i d e

t h e r e o f

w h i c h

r e c e i v e s t h e l o g . The w e a r p l a t e s e g m e n t s

3 4

a r e

r e a d i l y removable and r e p l a c e a b l e a s

wear

o c c u r s and

t h e y

r e n d e r

t h e

m a i n t e n a n c e o f

t h e

d i s c

a s s e m b l y e c o n o m i c a l

a n d c o n v e n i e n t . A d d i t i o n a l ly , t h e

t h i c k n e s s

o f t h e f i l l e r p l a t e s

3 3

may

b e c h a n g e d

i f d e s i r e d

t o

r e g u l a t e

t h e k n i f e s e t t i n g .

The

a r r a n g e m e n t

o f s e p a r a t e

f i l l e r

a n d

w e a r

p l a t e s e g m e n t s

r e n d e r s

t h e

d i s c a s s e m b l y v e r s a t i l e a n d e c o n o m i c a l a n d

t h e

o n l y

m a i n t e n a n c e

g e n e r a l l y

r e q u i r e d

i s

t h e

r e p l a c e m e n t o c c a ‘

s i o n a l l y o f w e a r p l a t e s

3 4

a n d

t h e

s h a r p e n i n g o r r e p l a c e m e n t

o f

c h i p p e r

k n i v e s . I t i s b e l i e v e d

t h a t

t h e a d v a n t a g e s

a n d

e c o n o m i e s

o f t h e s t r u c t u r e a n d

t h e

s i m p l i c i t y

t h e r e o f

w i l l

b e

r e c o g n i z e d b y

t h o s e

s k i l l e d

i n

t h e a r t .

I n v i e w

o f

t h e c i t e d

p r i o r p a t e n t s ,

i t

i s b e l i e v e d

t h a t a

d e s c r i p t i o n o f t h e g e n e r a l mode o f o p e r a t i o n o f t h e m a c h i n e ,

w h i c h i s c o n v e n t i o n a l , i s u n n e c e s s a r y h e r e i n .

I t i s t o

b e

u n d e r s t o o d t h a t t h e f o r m o f t h e

i n v e n t i o n

h e r e w i t h

shown and d e s c r i b e d i s t o b e

t a k e n

a s a

p r e f e r r e d

e x ~

ample o f t h e

s a m e , a n d

t h a t v a r i o u s

c h a n g e s i n

t h e s h a p e , s i z e

5 0

5 5

6 0

6 5

7 0

a n d

a r r a n g e m e n t o f p a r t s may

b e r e s o r t e d t o , w i t h o u t d e p a r t ~

i n g

f r o m

t h e

s p i r i t

o f

t h e

i n v e n t i o n o r

s c o p e

o f

t h e s u b j o i n e d

c l a i m s .

I c l a i m :

1 .

A

h i p p e r

k n i f e

a s s e m b l y

f o r

a

wood

c h i p p i n g

m a c h i n e

o f

t h e

r o t a r y

d i s c

t y p e c o m p r i s i n g a d i s c

b o d y

h a v i n g a c h i p s l o t

formed t h e r e t h r o u g h on

a

r a d i a l - l i n e and

h a v i n g

a r e c e s s

formed t h e r e i n

a t

o n e s i d e o f

t h e c h i p s l o t

i n

t h e

w o r k i n g f a c e

o f t h e

d i s c b o d y ,

a

h o l d e r s e a t e d w i t h i n t h e r e c e s s

and h a v i n g a

p a i r o f d i a g o n a l s t e p p e d s e a t i n g f a c e s

a n d

a

c o a c t i n g

p a i r

o f

r i g h t a n g u l a r

s t e p p e d

s h o u l d e r f a c e s ,

a c o u n t e r

k n i f e

a n d a

c h i p p e r k n i f e

r e s t i n g

u p o n t h e s e a t i n g f a c e s

a n d

b e i n g i n o p ~

p o s e d

c o n t a c t i n g

r e l a t i o n ,

s c r e w

s t o p e l e m e n t s i n t h e r e a r

e d g e s o f s a i d

k n i v e s

e n g a g i n g s a i d s h o u l d e r f a c e s , a c l a m p e l e

ment

i n c l u d i n g a d i a g o n a l

f a c e

c o n t a c t i n g

t h e o u t e r s i d e o f t h e

c h i p p e r

k n i f e

o v e r

a m a j o r p o r t i o n

o f

t h e

a r e a

o f t h e

l a t t e r

and

a l s o

c o n t a c t i n g one

o f t h e s h o u l d e r f a c e s ,

f a s t e n e r means

e n

g a g i n g t h r o u g h t h e c l a m p a n d h o l d e r a n d a n c h o r e d t o t h e

d i s c

b o d y

a n d

s e c u r i n g t h e h o l d e r ,

c l a m p

a n d s a i d k n i v e s i n

r i g i d

a s s e m b l e d

r e l a t i o n s h i p ,

t h e

c h i p p e r

k n i f e

e x t e n d i n g

d i a g o n a l l y

beyond one

wide

w a l l o f

t h e

s l o t

t o

a p o i n t n e a r t h e c e n t e r o f

t h e s l o t w i t h i t s c u t t i n g

e d g e p r o j e c t i n g o u t w a r d l y o f t h e w o r k

i n g f a c e o f t h e

d i s c b o d y ,

a

f i l l e r p l a t e element

on t h e working

7 5

f a c e o f t h e d i s c b o d y a d j a c e n t t h e s i d e s o f t h e h o l d e r a n d

clamp

r e m o t e from

s a i d s l o t , a wear p l a t e

e l e m e n t

mounted on

t h e

t i l l e r

p l a t e e l e m e n t

and

h a v i n g

a n o u t e r wear f a c e s u b s t a n

t i a l l y

f l u s h w i t h a n o u t e r

f a c e

o f

t h e c l a m p

a n d s a i d

c u t t i n g

Page 5: Title -Wood Chipper Disc and Knife Mounting

7/25/2019 Title -Wood Chipper Disc and Knife Mounting

http://slidepdf.com/reader/full/title-wood-chipper-disc-and-knife-mounting 5/5

3 , 5 4 2 , 3 0 2

3

e d g e ,

and

means

t o

s e c u r e t h e

f i l l e r

and wear

p l a t e elements t o

t h e

d i s c

b o d y

? x e d l y .

2 .

A h i p p e r

k n i f e

a s s e m b l y a s de?ned

b y

c l a i m 1

w h i c h i n

c l u d e s a

p l u r a l i t y

o f

s a i d

c h i p

s l o t s , r e c e s s e s

a n d

p a r t s

m o u n t e d t h e r e i n d i s p o s e d i n c i r c u m f e r e n t i a l l y e q u i d i s t a n t l y

s p a c e r e l a t i o n on t h e d i s c b o d y , a n d s a i d f i l l e r p l a t e and wear

p l a t e

e l e m e n t s a r r a n g e d

b e t w e e n ‘ a d j a c e n t p a i r s o f s l o t s a n d

b e i n g e q u a l l y

s i z e d

a n d c o l l e c t i v e l y c o v e r i n g s u b s t a n t i a l l y t h e

w o r k i n g f a c e o f

t h e

d i s c b o d y .

3 ,

A c h i p p e r k n i f e a s s e m b l y a s d e f i n e d b y c l a i m 1 w h e r e i n

s a i d clamp

h a s

a wedge

p o r t i o n

w i t h ‘ one

s i d e

o f t h e wedge

p o r t i o n

c o n t a c t i n g

t h e c h i p p e r k n i f e

and

t h e o t h e r

s i d e con

t a c t i n g

one o f s a i d s h o u l d e r

f a c e s

o f t h e h o l d e r .

4 . A

c h i p p e r k n i f e

a s s e m b l y

a s d e f i n e d b y

c l a i m

1 , w h e r e i n

s a i d

c o u n t e r k n i f e - i s narrower

t h a n

t h e c h i p p e r k n i f e and

un

1 0

20

25

3 5

45

5 5

6 0

6 5

75

4

d e r l i e s

t h e c h i p p e r k n i f e

a n d

i s

b e v e l e d

o p p o s i t e l y

t o t h e

c h i p p e r k n i f e

a n d

h a s a f o r w a r d l e a d i n g

e d g e

t e r m i n a t i n g

i n

w a r d l y o f t h e c u t t i n g

e d g e

o f t h e c h i p p e r k n i f e a n d p a r a l l e l

t h e r e t o ,

t h e

c h i p p e r k n i f e c u t t i n g e d g e a n d c o u n t e r k n i f e

b e v e l e d p o r t i o n s e r v i n g

t o

g u i d e

w o o d c h i p s

i n t o

s a i d c h i p s l o t

o f t h e

d i s c b o d y .

5 .

A

h i p p e r

k n i f e

a s s e m b l y

a s

d e f i n e d

b y

c l a i m

1 .

w h e r e i n

s a i d

screw

s t o p

elements

a r e s e t screws

engaging

w i t h i n

screw

t h r e a d c d o p e n i n g s

i n s a i d r e a r

e d g e s a n d

b e i n g i n d e p e n d e n t l y

a d j u s t a b l e .

6 . A

h i p p e r

k n i f e a s s e m b l y a s d e f i n e d b y c l a i m

1 ,

w h e r e i n

s a i d f a s t e n e r

means c o m p r i s e s

s c r e w s h a v i n g

t h e i r heads

r e c e s s e d

i n s a i d clamp s o t h a t t h e e x t e r i o r s u r f a c e o f t h e clamp

i s

free

ofobstructions.