Patent US3896693A successfully refreshed from Google Patents.
US3896693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gang saw with improved damping means
Assignee: Kockums Industri AB
•
Filing: 1974-04-05
•
Granted: 1975-07-29
•
Expires: 1994-04-05
Abstract
Abstract A crankshaft cradle is provided to damp out vibrations in a gang saw. The cradle is used to support the crankshaft and is pivotally attached to the gang saw frame. Forces that would normally be transferred from the crankshaft to the frame are damped out by means of the movable cradle, the movable cradle being pivotally attached to the frame by pendulum links.
Inventors
- 👤 Tage Hjalmar Johansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:59
CPC Classifications
B; B27; B27B; B27B3/00; B27B3/02; B27B3/12; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18056; Y10T74/18272; Y10T74/21; Y10T74/2173; Y10T74/2183; Y10T74/2184; Y10T83/00; Y10T83/687; Y10T83/688
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
322 words
In a gang saw having a frame and a driven crankshaft, means for substantially damping out vibrations transferred from the crankshaft to the frame, said damping means comprising: a. means for operatively journaling said crankshaft, b. means for movably securing said journaling means to said frame wherein said movably securing means allows substantially horizontal displacement of said crankshaft with respect to said frame when said crankshaft has a force applied thereto, said journaling means comprises a cradle and wherein said movably securing means comprises a plurality of links, each of said links being pivotally connected to said cradle and pivotally connected to said frame, said links are disposed in substantially parallel relationship to each other which enable said cradle to be displaced in a substantially horizontal direction when a connecting rod imparts a rotational movement to said crankshaft, said connecting rod is operatively connected at a distal end from said crankshaft to one end of a series of substantially parallel saw blades, said distal end being operatively connected to one end of said saw blades by means of a first sash vertically displaceable within a first vertical guide disposed in said frame, and wherein said saw blades have their opposite end being operatively connected by means of a second sash vertically displaceable within a second vertical guide disposed in said frame, so that when said first sash and said second sash are vertically displaced to a mean vertical position, said crankshaft will be correspondingly displaced to a substantially horizontal extreme position with respect to said frame, and when said first sash and said second sash are displaced to their extreme vertical positions, said crankshaft will be correspondingly positioned in a horizontal mean position with respect to said frame, said horizontal mean and extreme positions of said crankshaft resulting from a pendulum-like movement of said cradle caused by forces applied to said saw blades and asid connecting rod from a wood sawing operation.
Claim 2
Dependent Claim
322 words
In a gang saw having a frame and a driven crankshaft, means for substantially damping out vibrations transferred from the crankshaft to the frame, said damping means comprising: a. means for operatively journaling said crankshaft, b. means for movably securing said journaling means to said frame wherein said movably securing means allows substantially horizontal displacement of said crankshaft with respect to said frame when said crankshaft has a force applied thereto, said journaling means comprises a cradle and wherein said movably securing means comprises a plurality of links, each of said links being pivotally connected to said cradle and pivotally connected to said frame, said links are disposed in substantially parallel relationship to each other which enable said cradle to be displaced in a substantially horizontal direction when a connecting rod imparts a rotational movement to said crankshaft, said connecting rod is operatively connected at a distal end from said crankshaft to one end of a series of substantially parallel saw blades, said distal end being operatively connected to one end of said saw blades by means of a first sash vertically displaceable within a first vertical guide disposed in said frame, and wherein said saw blades have their opposite end being operatively connected by means of a second sash vertically displaceable within a second vertical guide disposed in said frame, so that when said first sash and said second sash are vertically displaced to a mean vertical position, said crankshaft will be correspondingly displaced to a substantially horizontal extreme position with respect to said frame, and when said first sash and said second sash are displaced to their extreme vertical positions, said crankshaft will be correspondingly positioned in a horizontal mean position with respect to said frame, said horizontal mean and extreme positions of said crankshaft resulting from a pendulum-like movement of said cradle caused by forces applied to said saw blades and asid connecting rod from a wood sawing operation.
Claim 3
Dependent Claim
102 words
A gang saw comprising: a. a frame, b. a sash having a plurality of parallel vertical saw blades, c. drive means for reciprocating said sash up and down in said frame and including a crankshaft rotatable about an axis and a connecting rod interconnecting said sash and said crankshaft, D. means journaling said crankshaft, and e. means movably securing said journaling means to said frame and allowing oscillation of said journaling means and said crankshaft with respect to the frame independently of the reciprocation of the sash and in a substantially horizontal direction transverse to the axis of rotation of said crankshaft.
Claim 4
Dependent Claim
102 words
A gang saw comprising: a. a frame, b. a sash having a plurality of parallel vertical saw blades, c. drive means for reciprocating said sash up and down in said frame and including a crankshaft rotatable about an axis and a connecting rod interconnecting said sash and said crankshaft, D. means journaling said crankshaft, and e. means movably securing said journaling means to said frame and allowing oscillation of said journaling means and said crankshaft with respect to the frame independently of the reciprocation of the sash and in a substantially horizontal direction transverse to the axis of rotation of said crankshaft.
Claim 5
Dependent Claim
41 words
A gang saw as recited in claim 2 wherein said journaling means comprises a cradle and wherein said securing means comprises a plurality of links, each of said links being pivotally connected to said cradle and pivotally connected to said frame.
Claim 6
Dependent Claim
32 words
A gang saw as recited in claim 3 wherein said links are disposed in substantially parallel relationship to each other and pivotally connected to said cradle on either side of said crankshaft.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |