US3800901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Final drive decoupling and parking brake arrangement for hydrostatic loader
Assignee: Caterpillar Inc
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Filing: 1971-12-23
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Granted: 1974-04-02
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Expires: 1991-12-23
Abstract
Abstract A hydrostatic loader final drive wherein a hydraulic motor transmits power through a quill shaft to reduction gearing coupled to a track driving sprocket wherein means are provided to conveniently disconnect the quill shaft from the reduction gearing or the motor in situations where it is necessary to tow the vehicle with the motor inoperable, and parking and/or emergency brake means are associated with the input side of the reduction gearing to lock same when the motor is inoperable.
Inventors
- 👤 G Blomstrom
- 👤 C Butler
- 👤 J Kostas
- 👤 S Papasideris
- 👤 C May
- 👤 R Nesbit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:32
CPC Classifications
B; B60; B60T; B60T1/00; B60T1/02; B60T1/06; B60T1/062; B60K; B60K17/00; B60K17/04; B60K17/10; B60K17/34; B60K17/348; B60K17/35; B60K17/3515; B60T11/00; B60T11/10; B60T11/103; B60T13/00; B60T13/10; B60T13/12; B60T13/22; B62; B62D; B62D11/00; B62D11/02; B62D11/06; B62D11/10; B62D11/14; B62D11/18; B62D11/186; B62D55/00; B62D55/08; B62D55/084; B62D55/0847; B62D55/12; B62D55/125; B62D55/13; F; F16; F16D; F16D55/00; F16D55/24; F16D55/26; F16D55/36; F16D55/40; F16D59/00; F16D59/02; B60Y; B60Y2200/00; B60Y2200/20; B60Y2200/25; F16D2055/0004; F16D2055/0058; F16H; F16H63/00; F16H63/02; F16H63/30; F16H63/3023; F16H63/3026; F16H2063/3033
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
212 words
In a hydrostatic drive including a reduction gear train having an input reduction unit with an internally splined input gear, and hydraulic motor means for coupling to said internally splined input gear in driving relationship thereto, said hydraulic motor means having an internally splined output cOnnection member, the combination comprising a quill shaft having a circular cross sectional configuration with a hollow axially extending interior portion and having first and second externally disposed axially spaced-apart splines at opposite ends thereof and said quill shaft being spline connected at said opposite ends to respectively said internally splined motor output connection member and said internally splined input gear, said quill shaft being longitudinally translatable between a first position wherein said second spline is engaged with said internally splined input gear and a second position wherein at least one of said first and second splines is disengaged from one of said internally splined output connection member or said internally splined input gear, means for physically translating said quill shaft between said first and second positions, said internally splined input gear also having externally disposed brake connection means, and brake means for directly applying braking force to said externally disposed connection means and to said input reduction unit to lock said input reduction unit against rotation.
Claim 2
Dependent Claim
212 words
In a hydrostatic drive including a reduction gear train having an input reduction unit with an internally splined input gear, and hydraulic motor means for coupling to said internally splined input gear in driving relationship thereto, said hydraulic motor means having an internally splined output cOnnection member, the combination comprising a quill shaft having a circular cross sectional configuration with a hollow axially extending interior portion and having first and second externally disposed axially spaced-apart splines at opposite ends thereof and said quill shaft being spline connected at said opposite ends to respectively said internally splined motor output connection member and said internally splined input gear, said quill shaft being longitudinally translatable between a first position wherein said second spline is engaged with said internally splined input gear and a second position wherein at least one of said first and second splines is disengaged from one of said internally splined output connection member or said internally splined input gear, means for physically translating said quill shaft between said first and second positions, said internally splined input gear also having externally disposed brake connection means, and brake means for directly applying braking force to said externally disposed connection means and to said input reduction unit to lock said input reduction unit against rotation.
Claim 3
Dependent Claim
50 words
The combination of claim 1, further defined by means longitudinally spring loading said quill shaft into said first position, and means including a rotatable cam directly engaging an end of said quill shaft for urging same against the spring loading force into said second position upon rotation of said cam.
Claim 4
Dependent Claim
42 words
The combination of claim 2, further defined by a shaft secured to said cam for rotating same extending through a wall of a housing enclosing said gear train, said shaft having a head at its external end for rotation by a tool.
Claim 5
Dependent Claim
63 words
The combination of claim 1, further defined by a jack bolt threaded through a wall of a housing enclosing said gear train, said jack bolt rotatably coaxially secured to an end of said quill shaft to normally longitudinally retain same in said first position, said jack bolt longitudinally translating said quill shaft to said second position responsive to unscrewing of said jack bolt.
Claim 6
Dependent Claim
53 words
The combination of claim 4, further defined by said end of said quill shaft having a recess rotatably receiving the tip end of said jack bolt, said tip end of said bolt jack having a circumferential groove, and a transverse pin secured across the wall of said recess and freely traversing said groove.
Claim 7
Dependent Claim
18 words
The combination of claim 1, further defined by said brake means comprising a spring applied hydraulically released brake.
Claim 8
Dependent Claim
27 words
The combination of claim 6, further defined by said brake being coupled to an output gear of said input reduction unit to selectively apply braking torque thereto.
Claim 9
Dependent Claim
123 words
The combination of claim 1, further defined by said brake comprising a first plurality of disks coaxially secured to said internally splined input gear, a second plurality of disks coaxially disposed with respect to said internally splined input gear and interleaved with said first plurality of disks, a brake housing enclosing said disks, loading springs acting between said brake housing and said second plurality of disks to normally resiliently urge same into frictional engagement with said first plurality of disks, and hydraulically actuated means carried by said brake housing and coupled to said second plurality of disks to urge same against the force of said springs to disengage said second plurality of disks from said first plurality of disks responsive to hydraulic pressure.
Claim 10
Dependent Claim
38 words
The combination of claim 7, further defined by a braking gear meshed with said output gear, and a second shaft coupled to said braking gear, said brake coupled to said second shaft to selectively apply braking torque thereto.
Claim 11
Dependent Claim
65 words
The combination of claim 9, further defined by said second shaft being a quill shaft spline connected to said braking gear, said second shaft being longitudinally translatable between a first position wherein the spline connection thereof is engaged and a second position wherein the spline connection thereof is disengaged, and mEans for manually longitudinally translating said second shaft between said first and second positions thereof.
Claim 12
Dependent Claim
45 words
The hydrostatic drive of claim 1 in a loader and further comprising a planetary output reduction unit in driving relation to a track driving sprocket, and a spring applied hydraulically released brake means coupled to said input reduction unit for selectively applying braking torque thereto.
Claim 13
Dependent Claim
111 words
The invention of claim 13, further defined by means longitudinally spring loaded said quill shaft into said first position, a rotatable cam engaging an end of said quill shaft for urging same against the spring loading force upon cam rotation, said cam being rotatable between a first position wherein said shaft is in said first position thereof and a second position wherein said cam holds said shaft in said second position thereof, and a second shaft secured to said cam to impart rotation thereto, said second shaft extending through a wall of a housing enclosing said gear train and having a head at its external end for engagement by a wrench.
Claim 14
Dependent Claim
58 words
The invention of claim 13, further defined by a jack bolt threaded through a wall of a housing enclosing said gear train, said bolt rotatably coaxially secured to an end of said shaft to normally longitudinally retain same in said first position, said bolt longitudinally translating said shaft to said second position responsive to unscrewing of said bolt.
Claim 15
Dependent Claim
119 words
The invention of claim 13, further defined by said brake comprising a first plurality of disks coaxially secured to said input gear, a second plurality of disks coaxially disposed with respect to said input gear and interleaved with said first plurality of disks, a brake housing enclosing said disks, loading springs acting between said brake housing and said second plurality of disks to normally resiliently urge same into frictional engagement with said first plurality of disks, and hydraulically actuated means carried by said brake housing and coupled to said second plurality of disks to urge same against the force of said springs to disengage said second plurality of disks from said first plurality of disks responsive to hydraulic pressure.
Claim 16
Dependent Claim
110 words
The invention of claim 14, further defined by means longitudinally spring loading said quill shaft into said first position, a rotatable cam engaging an end of said shaft for urging same against the spring loading force upon cam rotation, said cam being rotatable between a first position wherein said shaft is in said first position thereof and a second position wherein said cam holds said shaft in said second position thereof, and a second shaft secured to said cam to impart rotation thereto, said second shaft extending through a wall of a housing enclosing said gear train and having a head at its external end for engagement by a wrench.
Claim 17
Dependent Claim
59 words
The invention of claim 14, further defined by a jack bolt threaded through a wall of a housing enclosing said gear train, said bolt rotatably coaxially secured to an end of said quill shaft to normally longitudinally retain same in said first position, said bolt longitudinally translating said shaft to said second position responsive to unscrewing of said bolt.
Claim 18
Dependent Claim
38 words
The invention of claim 11, further defined by said braking means acting upon said input reduction unit second shaft coupled to said braking means, said braking means coupled to said second shaft to selectively apply braking torque thereto.
Claim 19
Dependent Claim
113 words
The invention of claim 17, further defined by means longitudinally spring loading said quill shaft into said first position thereof, a rotatable cam engaging an end of said first shaft for urging same against the spring loading force upon cam rotation, said cam rotatable between a first position wherein said quill shaft is in said first position thereof and a second position wherein said cam holds said quill shaft in said second position thereof, and a third shaft secured to said cam to impart rotation thereto, said third shaft extending through a wall of a housing enclOsing said gear train and having a head at its external end for engagement by a wrench.
Claim 20
Dependent Claim
61 words
The invention of claim 17, further defined by a jack bolt threaded through a wall of a housing enclosing said gear train, said bolt rotatably coaxially secured to an end of said quill shaft to normally longitudinally retain same in said first position, said bolt longitudinally translating said first shaft to said second position thereof responsive to unscrewing of said bolt.
Claim 21
Dependent Claim
65 words
The invention of claim 17, further defined by said second shaft being a quill shaft spline connected to said braking means, said second shaft being longitudinally translatable between a first position wherein the spline connection thereof is engaged and a second position wherein the spline connection thereof is disengaged, and means for manually longitudinally translating said second shaft between said first and second positions thereof.
Claim 22
Dependent Claim
113 words
The invention of claim 20, further defined by means longitudinally spring loading said quill shaft into said first position thereof, a rotatable cam engaging an end of said quill shaft for urging same against the spring loading force upon cam rotation, said cam rotatable between a first position wherein said quill shaft is in said first position thereof and a second position wherein said cam holds said quill shaft in said second position thereof, and a third shaft secured to said cam to impart rotation thereto, said third shaft extending through a wall of a housing enclosing said gear train and having a head at its external end for engagement by a wrench.
Claim 23
Dependent Claim
65 words
The invention of claim 21, further defined by a jack bolt threaded through a wall of said housing enclosing said gear train, said jack bolt rotatably coaxially secured to an end of said second shaft to normally longitudinally retain same in said first position thereof, said second bolt longitudinally translating said second shaft to said second position thereof responsive to unscrewing of said second bolt.
Claim 24
Dependent Claim
61 words
The invention of claim 20, further defined by a jack bolt threaded through a wall of a housing enclosing said gear train, said bolt rotatably coaxially secured to an end of said quill shaft to normally longitudinally retain same in said first position, said bolt longitudinally translating said quill shaft to said second position thereof responsive to unscrewing of said bolt.
Claim 25
Dependent Claim
66 words
The invention of claim 23, further defined by a second jack bolt threaded through a wall of said housing enclosing said gear train, said second bolt rotatably coaxially secured to an end of said second shaft to normally longitudinally retain same in said first position thereof, said second bolt longitudinally translating said second shaft to said second position thereof responsive to unscrewing of said second bolt.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |