US2428743A - Pitman - Google Patents
Pitman Download PDFInfo
- Publication number
- US2428743A US2428743A US576747A US57674745A US2428743A US 2428743 A US2428743 A US 2428743A US 576747 A US576747 A US 576747A US 57674745 A US57674745 A US 57674745A US 2428743 A US2428743 A US 2428743A
- Authority
- US
- United States
- Prior art keywords
- pitman
- strap
- link
- section
- cutter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H35/00—Gearings or mechanisms with other special functional features
- F16H35/10—Arrangements or devices for absorbing overload or preventing damage by overload
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2142—Pitmans and connecting rods
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/21—Elements
- Y10T74/2142—Pitmans and connecting rods
- Y10T74/2144—Yieldable
- Y10T74/2148—Automatic release
Definitions
- the present invention relates to new and useful improvements in pitmans adapted for connecting the wrist or crank pin f mowing machines, binders or combines with the sickle or cutter bar thereof.
- An important object of the present invention is to provide a pitman of this character adapted for connecting the sickle or cutter bar with the wrist or crank pin of the driving mechanism so that the pitman is free to pivot vertically or horizontally for preventing the strain or breakage thereof when the cutter comes into contact with an obstruction.
- the same may now be constructed of metal and composed of pivoted sections normally retained in longitudinal alignment to transform the rotary motion of the drive means of the machine to a reciprocatory motion of the cutter and in which the sections of the pitman are adapted to pivot either vertically or horizontally to prevent bending, distortion or breaking of the parts upon the striking of an obstruction.
- a further object of the invention is to provide a pitman of this character of simple and practical construction, which is strong and durable, relatively inexpensive to manufacture and otherwise well adapted for the purposes for which the same is intended.
- Figure 1 is a top plan view of the pitman adapted for use with old style mowers.
- Figure 2 is a fragmentary side elevational view showing the extension provided for new style mowers.
- Figure 3 is an edge elevational view of the form of the invention illustrated in Figure l.
- Figure 4 is a longitudinal sectional view taken substantially on the line 4-4 of Figure 3.
- Figure 5 is a sectional view taken substantially on the line 55 of Figure 3.
- Figure 6 is a side elevational view of the center rod of the pitman.
- Figure 7 is an enlarged side elevational view of the end section of the pitman of the form of the invention illustrated in Figure 2.
- Adjacent ends of the section 8 and link I0 are disposed in overlapping relation and are reduced in thickness, as illustrated in Figure 4 of the drawings and having their opposed faces flattened to permit horizontal swinging movement of the link l0 relative to the section 8
- the outer end of the link If] is pivotally attached to the inner end of the knife end clamping strap 1 by a horizontal pin or bolt i2, the adja cent sections of the link and the strap being disposed in overlapping relation and with their op.. posed faces flattened, as more clearly shown in Figure 1 of the drawings to permit vertical movement of the strap relative to the link.
- the strap 1 includes the detachable knife end clamping plate l3 secured to the end of the strap by means of a bolt l4 and by means of which the knife end of the cutter bar may be connected to the strap in the usual manner.
- the strap 1 may be pivoted either vertically or horizontally to prevent breaking of the rod upon the striking of an obstruction by the cutter.
- the inner and outer ends of the link In may be maintained in longitudinal alignment with respect to the pitman by means of conventional form of spring-projected balls I5 carried at the outer end of the socket 9 and adapted for seating in a socket or recess I6 in the adjacent end of the link l0 and a similar spring-projected ball I! carried at the inner end of the strap 1 and adapted for seating in a recess or socket it in the adjacent end of the link, as more clearly shown in Figure 4 of the drawings.
- the halls I5 and l! are of a type for snapping into and out of position in their respective sockets.
- a pitman rod section 19 constructed identical to the section 8 and threaded on the adjacent end of the section 5, and to which a link 20 is pivotally attached similar to the link H], but for swinging laterally.
- is pivotally attached to the outer end of the link 20 in a manner similar to the strap I, but, for swinging vertically, the strap 2
- the pitman is adapted for horizontal as well as vertical pivotal movement with respect to the strap 2
- the strap .2] :.and ilinkifl are removed at the box end ,ofilhe .pitman and the straps 1 and I0 removed at the knife end thereof and a strap of the form designated ,at'
- the strap 12 2 includes an enlarged head “Z3 at its outer end having a ball bearing assembly 24 mounted in an openingthereof, the ball bear n assembly providing a pivotal attaching means at right angles 't-ot-the pivoted inner end d-f the,strap. 1
- the strap 22 is yieldably maintained in elongi -tudin,ally aligned position with respect to the :pi-tman by means of a spring-projected ball 25 similar -toothe links A 0 and :20.
- a pitman comprising a center portion, extensions detachably connected to each end of said center portion, links pivoted at their inner ends :to each extension for pivotal mOYQmEQt about rig-ht -angularly related axes, and attaching straps pivoted to the outer ends of the links for :pivotal movement in a direction at right angles 1 50 that of their adjacent links, and snap catch means releasably maintaining the straps and links in longitudinal alignment with said center portion and responsive to predetermined pivotal force subjected 'tothe straps to release the catch means.
Description
Oct. 7, 1947.
A. E. ROXBERG PI'IMAN Filed Feb. 8., 1945 2 Shets-Sheet 1 Pea 391:
iiBy .93 v. v
Ot. 7, 1947. A. E. ROXBERG 1 P'ITMAN I I Filed Feb. 8, 1945 -2 Sheets-Sheet 2 Inventor WWW Patented Oct. 7, 1 947 UNITED STATES-PATENT OFFICE PI'lfMAN Arvid E. Roxberg, Minneapolis, Minn.
Application February 8, 1945, Serial No. 576,747
The present invention relates to new and useful improvements in pitmans adapted for connecting the wrist or crank pin f mowing machines, binders or combines with the sickle or cutter bar thereof.
An important object of the present invention is to provide a pitman of this character adapted for connecting the sickle or cutter bar with the wrist or crank pin of the driving mechanism so that the pitman is free to pivot vertically or horizontally for preventing the strain or breakage thereof when the cutter comes into contact with an obstruction.
Formerly it has been the practice of constructing pitmans of this character of wood which easily becomes broken upon engagement of the cutter with an obstruction.
By reason of my improved pitman construction, the same may now be constructed of metal and composed of pivoted sections normally retained in longitudinal alignment to transform the rotary motion of the drive means of the machine to a reciprocatory motion of the cutter and in which the sections of the pitman are adapted to pivot either vertically or horizontally to prevent bending, distortion or breaking of the parts upon the striking of an obstruction.
A further object of the invention is to provide a pitman of this character of simple and practical construction, which is strong and durable, relatively inexpensive to manufacture and otherwise well adapted for the purposes for which the same is intended.
Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:
Figure 1 is a top plan view of the pitman adapted for use with old style mowers.
Figure 2 is a fragmentary side elevational view showing the extension provided for new style mowers.
Figure 3 is an edge elevational view of the form of the invention illustrated in Figure l.
Figure 4 is a longitudinal sectional view taken substantially on the line 4-4 of Figure 3.
Figure 5 is a sectional view taken substantially on the line 55 of Figure 3.
Figure 6 is a side elevational view of the center rod of the pitman.
Figure 7 is an enlarged side elevational view of the end section of the pitman of the form of the invention illustrated in Figure 2.
1 Claim. (01. 74-584) Referring now to the drawings in detail, and first with respect to the form of the invention illustrated in Figures 1 and 3 of the drawings, the
- with one end 6 of the center section 5 and having a link [0 pivotally connected to the section 8 at the outer end of the latter by means of a bolt or pin II.
Adjacent ends of the section 8 and link I0 are disposed in overlapping relation and are reduced in thickness, as illustrated in Figure 4 of the drawings and having their opposed faces flattened to permit horizontal swinging movement of the link l0 relative to the section 8 The outer end of the link If] is pivotally attached to the inner end of the knife end clamping strap 1 by a horizontal pin or bolt i2, the adja cent sections of the link and the strap being disposed in overlapping relation and with their op.. posed faces flattened, as more clearly shown in Figure 1 of the drawings to permit vertical movement of the strap relative to the link.
The strap 1 includes the detachable knife end clamping plate l3 secured to the end of the strap by means of a bolt l4 and by means of which the knife end of the cutter bar may be connected to the strap in the usual manner.
Accordingly, by reason of the vertical pivot pin II and the horizontal pivot pin I 2, the strap 1 may be pivoted either vertically or horizontally to prevent breaking of the rod upon the striking of an obstruction by the cutter.
The inner and outer ends of the link In may be maintained in longitudinal alignment with respect to the pitman by means of conventional form of spring-projected balls I5 carried at the outer end of the socket 9 and adapted for seating in a socket or recess I6 in the adjacent end of the link l0 and a similar spring-projected ball I! carried at the inner end of the strap 1 and adapted for seating in a recess or socket it in the adjacent end of the link, as more clearly shown in Figure 4 of the drawings. The halls I5 and l! are of a type for snapping into and out of position in their respective sockets.
Likewise, at the other end of the center section 5 of the pitman is a pitman rod section 19 constructed identical to the section 8 and threaded on the adjacent end of the section 5, and to which a link 20 is pivotally attached similar to the link H], but for swinging laterally.
A box end pitman strap 2| is pivotally attached to the outer end of the link 20 in a manner similar to the strap I, but, for swinging vertically, the strap 2| being adapted for use upon old style mowers.
The ends of the link 2| are releasably secured in longitudinal alignment with the pitman by means of zbalrl and socket members, as'pneviousjly described-with respect to the dink-i=0.
Accordingly, the pitman is adapted for horizontal as well as vertical pivotal movement with respect to the strap 2|.
In order to adapt the invention for use in newer type mowers, the strap .2] :.and ilinkifl are removed at the box end ,ofilhe .pitman and the straps 1 and I0 removed at the knife end thereof and a strap of the form designated ,at'
22 in Figures 2 and 7 of the drawings is pivotally attached to the ends-of the sections \8 and '19,
respectively. 7
"The strap 12 2 includes an enlarged head "Z3 at its outer end having a ball bearing assembly 24 mounted in an openingthereof, the ball bear n assembly providing a pivotal attaching means at right angles 't-ot-the pivoted inner end d-f the,strap. 1 The strap 22 :is yieldably maintained in elongi -tudin,ally aligned position with respect to the :pi-tman by means of a spring-projected ball 25 similar -toothe links A 0 and :20.
It is believed that the details of construction and manner of use of the device will be readily understood from the foregoing without further detailed explanation. Y
Having thus described the invention, what I claim is:
A pitman comprising a center portion, extensions detachably connected to each end of said center portion, links pivoted at their inner ends :to each extension for pivotal mOYQmEQt about rig-ht -angularly related axes, and attaching straps pivoted to the outer ends of the links for :pivotal movement in a direction at right angles 1 50 that of their adjacent links, and snap catch means releasably maintaining the straps and links in longitudinal alignment with said center portion and responsive to predetermined pivotal force subjected 'tothe straps to release the catch means.
Numbe Name. Date 797,267 Crutchiow an Aug. l5, 4995 1,313,764 Thurston Aug, 19,1919 39 1,662,657 tllpeicniwl- Mali-13,1928
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US576747A US2428743A (en) | 1945-02-08 | 1945-02-08 | Pitman |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US576747A US2428743A (en) | 1945-02-08 | 1945-02-08 | Pitman |
Publications (1)
Publication Number | Publication Date |
---|---|
US2428743A true US2428743A (en) | 1947-10-07 |
Family
ID=24305824
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US576747A Expired - Lifetime US2428743A (en) | 1945-02-08 | 1945-02-08 | Pitman |
Country Status (1)
Country | Link |
---|---|
US (1) | US2428743A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1260844B (en) * | 1967-03-01 | 1968-02-08 | Busatis Geb | Overload devices for cutter drives |
US4569248A (en) * | 1983-10-18 | 1986-02-11 | Storage Technology Partners | Coupling arm for transmitting linear motion |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US797267A (en) * | 1905-05-09 | 1905-08-15 | William Crutchlow | Knuckle-joint. |
US1313764A (en) * | 1919-08-19 | Flexible pitman | ||
US1431389A (en) * | 1920-03-12 | 1922-10-10 | George E Frisz | Operating tool |
US1662657A (en) * | 1922-12-02 | 1928-03-13 | American Eng Co Ltd | Safety device for stokers |
-
1945
- 1945-02-08 US US576747A patent/US2428743A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1313764A (en) * | 1919-08-19 | Flexible pitman | ||
US797267A (en) * | 1905-05-09 | 1905-08-15 | William Crutchlow | Knuckle-joint. |
US1431389A (en) * | 1920-03-12 | 1922-10-10 | George E Frisz | Operating tool |
US1662657A (en) * | 1922-12-02 | 1928-03-13 | American Eng Co Ltd | Safety device for stokers |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1260844B (en) * | 1967-03-01 | 1968-02-08 | Busatis Geb | Overload devices for cutter drives |
US4569248A (en) * | 1983-10-18 | 1986-02-11 | Storage Technology Partners | Coupling arm for transmitting linear motion |
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