US4951452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Large bale hay baler
Assignee: Ezra C Lundahl Inc
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Filing: 1989-06-09
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Granted: 1990-08-28
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Expires: 2009-06-09
Abstract
Abstract A hay baler including a trailer frame with a hitch for attachment to a prime mover and support wheels. A crop pick-up unit moves cut crop into a material storage area, from where it is moved into a bale chamber and is compacted by a compression unit and tied with twine before being discharged to ground from the rear of the trailer frame.
Inventors
- 👤 E. Cordell Lundahl
- 👤 J. Gordon Wiser
- 👤 Laurel H. Jensen
- 👤 Ernie Vandenwijengeart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:45
CPC Classifications
A; A01; A01F; A01F15/00; A01F15/04; A01F15/046; A01D; A01D85/00; A01D85/001; A01D85/002
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
166 words
A large hay baler comprising: a vehicle frame; means on said vehicle frame defining an accumulator chamber, a compaction chamber connected to said accumulator chamber, a bale chamber connected to said accumulator chamber and having a tailgate carried by the frame and positioned at the end of the bale chamber; means for picking up cut crop and for delivering said cut crop into the accumulator chamber; means for selectively transferring material from said accumulator chamber to said compaction chamber; means for compacting material in the compaction chamber; ram means for moving said compacted material in said compaction chamber into the bale chamber thereby compressing said compacted material at a first rate; said ram means further compressing at a second and slower rate and to a greater degree said compressed material in said bale chamber; means for tying said compressed material int eh bale chamber when compressed to a desired density into a bale; and means for opening the tailgate to release the compacted and tied bale.
Claim 2
Dependent Claim
166 words
A large hay baler comprising: a vehicle frame; means on said vehicle frame defining an accumulator chamber, a compaction chamber connected to said accumulator chamber, a bale chamber connected to said accumulator chamber and having a tailgate carried by the frame and positioned at the end of the bale chamber; means for picking up cut crop and for delivering said cut crop into the accumulator chamber; means for selectively transferring material from said accumulator chamber to said compaction chamber; means for compacting material in the compaction chamber; ram means for moving said compacted material in said compaction chamber into the bale chamber thereby compressing said compacted material at a first rate; said ram means further compressing at a second and slower rate and to a greater degree said compressed material in said bale chamber; means for tying said compressed material int eh bale chamber when compressed to a desired density into a bale; and means for opening the tailgate to release the compacted and tied bale.
Claim 3
Dependent Claim
82 words
A large bale hay baler as in claim 1, wherein the means for picking up cut crop and for delivering the said crop into the accumulator chamber includes blower means carried by said vehicle frame; rotating pick-up means carried by the frame and engaging cut crop to lift the crop from the ground; and duct means extending from the pick-up means to the accumulator chamber receiving air from the blower means and cut crop from the pick-up means control means for providing.
Claim 4
Dependent Claim
27 words
A large bale hay baler as in claim 2, wherein the duct means is continually enlarging in cross section from the pick-up means to the accumulator chamber.
Claim 5
Dependent Claim
75 words
A large bale hay baler as in claim 3, wherein the rotating pick-up means is mounted for rotation in a portion of the duct means; and further including support arms pivoted to the vehicle frame and supporting a portion of duct means and the rotating pick-up means; and means for pivoting the support portion of the duct means supported by said arms and said rotating pick up means between a raised and a lowered position.
Claim 6
Dependent Claim
68 words
A large bale hay baler as in claim 3, wherein the ram means for compacting material in the compaction chamber includes; a press head; cylinder means including a rod fixed to the press head; and means for operating the cylinder means to reciprocate the press head into and out of the compaction chamber control means for providing at least two speeds and corresponding different pressures for the cylinder.
Claim 7
Dependent Claim
42 words
A large bale hay baler as in claim 5, further including means carried by the press head for closing off flow of cut crop from the accumulator chamber to the compaction chamber when the press head is reciprocated within the bale chamber.
Claim 8
Dependent Claim
56 words
A large bale hay baler as in claim 6, further including shear means on press head; and cooperating shear means carried by the vehicle frame at the inlet to the compaction chamber, whereby the shear means cuts through material located between the accumulator and compaction chambers upon movement of the press head through the compaction chamber.
Claim 9
Dependent Claim
29 words
A large bale hay baler as in claim 5, further including at least one spike projecting from the press head to penetrate material being compacted by the press head.
Claim 10
Dependent Claim
76 words
A large bale hay baler as in claim 5, wherein said control means index control means for operating the cylinder means to move the press head into the compaction chamber at first fast speed until a predetermined compaction of material in the bale chamber is reached and to thereafter continue movement of the pressure head into the bale chamber at a slower speed and greater pressure until a desired maximum compaction of the material is achieved.
Claim 11
Dependent Claim
27 words
A large bale hay baler as in claim 9, further including means carried by walls of the bale chamber to prevent reverse travel of material compacted therein.
Claim 12
Dependent Claim
55 words
A large bale hay baler as in claim 10, further including means including slots in the press head which allow the means carried by the walls of the bale chamber to prevent reverse travel of material compacted therein to move in and to hold said material when the press head reaches maximum press head travel.
Claim 13
Dependent Claim
71 words
A large bale hay baler as in claim 11, wherein the means carried by walls of the bale chamber to prevent reverse travel of material compacted therein comprise spring loaded dogs extending into the bale chamber and opening to permit material to move into the bale chamber but closing to prevent movement of said material out of said bale chamber to thereby allow complete and uniform filling of said bale chamber.
Claim 14
Dependent Claim
29 words
A large bale hay baler as in claim 12, further including means for moving formed and tied bales across the tailgate to discharge, while another bale is being formed.
Claim 15
Dependent Claim
23 words
A large bale hay baler as in claim 13, further including means for closing the tailgate after discharge of a tied bale thereacross.
Claim 16
Dependent Claim
31 words
A large bale hay baler as in claim 13, further including means to adjustably position the tailgate relative to the bale chamber to thereby change the length of a formed bale.
Claim 17
Dependent Claim
83 words
A large bale hay baler as in claim 14, wherein the means for tying the material compacted in the bale chamber to a desired density includes a plurality of straight knotter needles carried by the vehicle frame above the bale chamber; grooves in the press head for needle to reciprocate into and out of while bale is under full compression; and a knotter for each needle positioned beneath the bale chamber and adapted to tie strings moved to the knotters by the needles.
Claim 18
Dependent Claim
126 words
A large bale hay baler as in claim 1, wherein the means for tying the material compacted in the bale chamber to a desired density includes a plurality of straight needles carried by the vehicle frame above the bale chamber; a groove for each needle on a face of the press head; means for operating said needles to move the tips thereof through said grooves when material in the compaction chamber has reached a predetermined degree of compaction; knotter means to cooperate with said needles and strings carried by said needles around material in the bale chamber; means to withdraw said needles from said grooves after tying of the strings; and means for leaving the strings in a position to wrap around a new forming bale.
Claim 19
Dependent Claim
27 words
A large bale hay baler as in claim 17, further including means carried by walls of the bale chamber to prevent reverse travel of material compacted therein.
Claim 20
Dependent Claim
60 words
A large bale hay baler as in claim 18, wherein the means carried by walls of the bale chamber to prevent reverse travel of material compacted therein comprise spring loaded dogs extending into the compaction chamber and opening to permit material to move into the bale chamber but closing to prevent movement of said material out of said bale chamber.
Claim 21
Dependent Claim
23 words
A large bale hay baler as in claim 19, further including means for moving formed and tied bales across the tailgate to discharge.
Claim 22
Dependent Claim
22 words
A large bale hay baler as in claim 20, further including means for closing the tailgate after discharge of a bale thereacross.
Claim 23
Dependent Claim
31 words
A large bale hay baler as in claim 21, further including means to adjustably position the tailgate relative to the bale chamber to thereby change the length of the bale formed.
Claim 24
Dependent Claim
31 words
A large bale hay baler as in claim 21, further including control means to regulate the pressure applied by the ram means and thereby control the density of the bale formed.
Claim 25
Dependent Claim
37 words
A large bale hay baler as in claim 23, further including means for uniformly filling the bale chamber by exhausting air from the air delivery system to low density areas of material in the said bale chamber.
Claim 26
Dependent Claim
43 words
A large bale hay baler as in claim 24, further including means for applying downward air pressure to material contained in the said accumulator chamber during the press cycle, to provide rapid delivery of material to the bale chamber following the press cycle.
Claim 27
Dependent Claim
29 words
A large bale hay baler as in claim 25, further including means located ahead of the accumulator chamber for exhausting excessive air from the air delivery during press cycles.
Claim 28
Dependent Claim
38 words
A large bale hay baler as in claim 26, further including means for determining when the said bale chamber is full and for initiating a press stroke by the ram means only when the bale chamber is full.
Claim 29
Dependent Claim
28 words
A large bale hay baler as in claim 27, further including means for informing the operator that the vehicle is travelling too fast for maximum pick-up of material.
Claim 30
Dependent Claim
40 words
A large bale hay baler as in claim 28, further including means for redirecting air from the air delivery system to clear the lower portion of the horizontal part of the air delivery tube, when said tube is excessively filled.
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) | 1993-08-27 | 1994-02-26 | 1994-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-27 | 1998-02-26 | 1998-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-27 | 2002-02-26 | 2002-08-28 | $7700.00 | Window Closed / Lapsed |