US3890669A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lockable castor, in particular swivel castor
Assignee: Tente Rollen GmbH and Co
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Filing: 1974-01-08
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Granted: 1975-06-24
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Expires: 1994-01-08
Abstract
Abstract A castor, in particular of the kind of a swivel castor, comprises a wheel which is supported in a wheel clevis and locking means for locking the rotation of the wheel and/or the swivel motion of the wheel clevis in the case of a swivel castor. The locking means including a clamping lever that is pivotably supported in the clevis cavity and may be pivotable and lockable in its locking position by operation of a push-button control element. The push-button control element and a movable locking element are disposed on the clamping lever. The movable locking element can be locked in its locking position by said push-button control element. The clamping lever may be a two-armed rocker which is supported on a transverse shaft. The movable locking element may be a double-sided pivoting lever which is supported on the clamping lever by means of a pivoting shaft. In an embodiment the movable locking element may be a pivotable bell crank which is provided with an upwardly orientated locking arm.
Inventors
- 👤 Gunter Reinhards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:34
CPC Classifications
B; B60; B60B; B60B33/00; B60B33/02; B60B33/021; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20636
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
136 words
A castor, in particular a swivel castor, comprising a wheel which is supported in a wheel clevis and locking means for locking the rotation of the wheel and/or the swivel motion of the wheel clevis including a clamping lever that is pivotably supported in the clevis cavity and is pivotable and lockable in its locking position by operation of a push-button control element, characterised in that the push-button control element is attached or fastened on the pivotable clamping lever as a part thereof and so that the push-button control element forms a pivotable unit with the clamping lever, and a movable lever locking element which also is attached or fastened on the pivotable clamping lever and which can be locked itself in its locking position by said push-button control element after locking said pivotable clamping lever.
Claim 2
Dependent Claim
136 words
A castor, in particular a swivel castor, comprising a wheel which is supported in a wheel clevis and locking means for locking the rotation of the wheel and/or the swivel motion of the wheel clevis including a clamping lever that is pivotably supported in the clevis cavity and is pivotable and lockable in its locking position by operation of a push-button control element, characterised in that the push-button control element is attached or fastened on the pivotable clamping lever as a part thereof and so that the push-button control element forms a pivotable unit with the clamping lever, and a movable lever locking element which also is attached or fastened on the pivotable clamping lever and which can be locked itself in its locking position by said push-button control element after locking said pivotable clamping lever.
Claim 3
Dependent Claim
160 words
A castor according to claim 1, in particular of the kind of a swivel castor, comprising a wheel which is supported in a wheel clevis and locking means for locking the rotation of the wheel and/or the swivel motion of the wheel clevis including a clamping lever that is pivotably supported in the clevis cavity and may be pivotable and lockable in its locking position by operation of a push-button control element, characterised in that the pivotable clamping lever is a two-armed rocker which is pivotably supported on a transverse shaft and that the push-button control element is attached or fastened on one rocker arm of the pivotable clamping lever as a part of said rocker arm forming a pivotable unit therewith, and a movable lever locking element which also is attached or fastened on the pivotable clamping lever and which can be locked itself in its locking position by said push-button control element after locking said pivotable clamping lever.
Claim 4
Dependent Claim
35 words
Castor according to claim 2, characterised in that the rocker is provided with rocker arms of differend length and the push-button control element is attached or fastened near the end of the longer rocker arm.
Claim 5
Dependent Claim
24 words
Castor according to claim 1, characterised in that the lever locking element is a double-sided pivoting lever which is supported on the clamping lever.
Claim 6
Dependent Claim
199 words
A castor acCording to claim 1, in particular of the kind of a swivel castor, comprising a wheel which is supported in a wheel clevis and locking means for locking the rotation of the wheel and/or the swivel motion of the wheel clevis including a clamping lever that is pivotably supported in the clevis cavity and may be pivotable and lockable in its locking position by operation of a push-button control element, characterised in that the pivotable clamping lever is a two-armed rocker which is pivotably supported on a transverse shaft and having rocker arms of different length, and that the push-button control element is attached or fastened on the longer rocker arm near its end as a part of said rocker arm and forming a pivotable unit therewith and that the lever locking element is a double-sided pivoting lever which is supported on the longer rocker arm of said pivotable clamping lever by means of a pivoting shaft, and that one of the lever arms of said pivoting lever is adapted for being acted upon by said push-button control element to be locked in its locking position by said push-button control element after locking said pivotable clamping lever.
Claim 7
Dependent Claim
17 words
Castor according to claim 4, characterised in that the lever locking element is a pivotable bell crank.
Claim 8
Dependent Claim
39 words
Castor according to claim 6, characterised in that the bell crank is provided with an upwardly orientated locking arm which is adapted to plunge into an aperture of the wheel clevis back when it is in the loose position.
Claim 9
Dependent Claim
17 words
Castor according claim 1, characterised in that the movable locking element is biased by an unlocking spring.
References Cited (Backward Citations)
US3751757A
Cited
US3772733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |