US4033420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weighing scale
Assignee: Revere Transducers Inc
•
Filing: 1976-05-20
•
Granted: 1977-07-05
•
Expires: 1996-05-20
Abstract
Abstract This scale is primarily intended for the weighing of a hospital bed containing a patient. It may weigh an empty bed or any wheeled load. The scale is mounted on a frame which rests on the floor during a weighing operation, and is lifted off the floor onto a set of casters for moving the scale from one location to another. A detachable handle is provided for pulling the scale on its casters. The scale frame is oblong. The bed being weighed is supported on two channel-shaped rails, which are upwardly open. A pair of upwardly open, channel-shaped ramps are provided for rolling a bed onto the weighing rails from either side of the scale. The rails are provided with retractable blocking bars at both ends to prevent a bed from accidentally rolling off the rail. The ramps are removable. Provision is made for mounting the ramps on the scale during movement of the scale from one location to another.
Inventors
- 👤 James J. De Masters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:13
CPC Classifications
G; G01; G01G; G01G19/00; G01G19/44; G01G19/445; G01G21/00
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
125 words
A scale for weighing a wheeled load, comprising: a. a frame for supporting the load during weighing, including rails for receiving and guiding the wheels; b. ramps for supporting and guiding the wheels during movement of the load onto the rails; c. load cell means supporting said frame and any load thereon; d. indicator means operated by the load cell means; and e. means for removably connecting one end of each ramp to one end of each rail, said removable connecting means comprising a crossbar under each rail adjacent an end thereof and projecting from opposite sides thereof, and a pair of projections on the outer sides of one end of each ramp, said projections having recesses to engage the projecting ends of the crossbars.
Claim 2
Dependent Claim
125 words
A scale for weighing a wheeled load, comprising: a. a frame for supporting the load during weighing, including rails for receiving and guiding the wheels; b. ramps for supporting and guiding the wheels during movement of the load onto the rails; c. load cell means supporting said frame and any load thereon; d. indicator means operated by the load cell means; and e. means for removably connecting one end of each ramp to one end of each rail, said removable connecting means comprising a crossbar under each rail adjacent an end thereof and projecting from opposite sides thereof, and a pair of projections on the outer sides of one end of each ramp, said projections having recesses to engage the projecting ends of the crossbars.
Claim 3
Dependent Claim
162 words
A scale for weighing a wheeled load, comprising: a. a frame for supporting the load during weighing, including upwardly open, channel-shaped rails for receiving and guiding the wheels; b. ramps for supporting and guiding the wheels during movement of the load onto the rails; c. load cell means supporting said frame and any load thereon; d. indicator means operated by the load cell means; e. retractable blocking bars adjacent the ends of the rails for preventing accidental movement of the wheels off said ends; f. pivot means connecting one end of each blocking bar to one side of its associated rail to permit movement of the bar between a blocking position in which it extends across its associated channel-shaped rail and a retracted position in which the rail is open; and g. fastening means on the opposite side of each rail from the respective pivot means for engaging the other end of the blocking bar to hold it in its blocking position.
Claim 4
Dependent Claim
162 words
A scale for weighing a wheeled load, comprising: a. a frame for supporting the load during weighing, including upwardly open, channel-shaped rails for receiving and guiding the wheels; b. ramps for supporting and guiding the wheels during movement of the load onto the rails; c. load cell means supporting said frame and any load thereon; d. indicator means operated by the load cell means; e. retractable blocking bars adjacent the ends of the rails for preventing accidental movement of the wheels off said ends; f. pivot means connecting one end of each blocking bar to one side of its associated rail to permit movement of the bar between a blocking position in which it extends across its associated channel-shaped rail and a retracted position in which the rail is open; and g. fastening means on the opposite side of each rail from the respective pivot means for engaging the other end of the blocking bar to hold it in its blocking position.
Claim 5
Dependent Claim
183 words
A scale for weighing a wheeled bed, comprising: (a) a rectangular frame for supporting the bed during weighing, including two upwardly open, channel-shaped rails for supporting and guiding the wheels of the bed; (b) a pair of upwardly open, channel-shaped ramps for supporting and guiding the wheels of the bed during movement thereof on and off the rails; (c) a rectangular base; (d) load cell means on the base and supporting the frame; (e) indicator means operated by the load cell means; (f) at least three wheels for supporting the base; and (g) means for moving each base-supporting wheel between an active position in which the base is lifted from an underlying surface and is supported in part by the wheel for travel along said surface, and a retracted position in which the base rests on said underlying surface; said moving means including, for each wheel: (1) means connecting the base and the wheel including an over-center linkage, and means limiting the linkage movement in one direction to establish said active position; and (2) means for applying an operating force to said linkage.
Claim 6
Dependent Claim
183 words
A scale for weighing a wheeled bed, comprising: (a) a rectangular frame for supporting the bed during weighing, including two upwardly open, channel-shaped rails for supporting and guiding the wheels of the bed; (b) a pair of upwardly open, channel-shaped ramps for supporting and guiding the wheels of the bed during movement thereof on and off the rails; (c) a rectangular base; (d) load cell means on the base and supporting the frame; (e) indicator means operated by the load cell means; (f) at least three wheels for supporting the base; and (g) means for moving each base-supporting wheel between an active position in which the base is lifted from an underlying surface and is supported in part by the wheel for travel along said surface, and a retracted position in which the base rests on said underlying surface; said moving means including, for each wheel: (1) means connecting the base and the wheel including an over-center linkage, and means limiting the linkage movement in one direction to establish said active position; and (2) means for applying an operating force to said linkage.
Claim 7
Dependent Claim
22 words
A scale as in claim 3, in which said force applying means comprises a handle detachable from and attachable to said linkage.
Claim 8
Dependent Claim
40 words
A scale as in claim 3, including two wheels at one end of the base, a transverse link connecting the two over-center linkages thereof so that those two wheels are operated concurrently between their active positions and their retracted positions.
Claim 9
Dependent Claim
39 words
A scale as in claim 3, including: (a) means for removably mounting said ramps at the ends of said rails; and (b) means for removably mounting said ramps on the frame for travel of the scale on its wheels.
Claim 10
Dependent Claim
33 words
A scale as in claim 3, including a detachable drawbar for pulling the scale when mounted on its wheels, and means supported on the base for carrying said drawbar when not in use.
Claim 11
Dependent Claim
140 words
A movable weighing scale, comprising: a. a frame for supporting a load to be weighed; b. a movable base; c. load cell means on the base and supporting the frame; d. indicator means operated by the load cell means; e. at least three wheels for supporting the base; and f. means for moving each base-supporting wheel between an active position in which the base is lifted from an underlying surface and is supported in part by the wheel for travel along said surface, and a retracted position in which the base rests on said underlying surface; said moving means including, for each wheel: 1. means connecting the base and the wheel including an over-center linkage, and means limiting the linkage movement in one direction to establish said active position; and 2. means for applying an operating force to said linkage.
Claim 12
Dependent Claim
140 words
A movable weighing scale, comprising: a. a frame for supporting a load to be weighed; b. a movable base; c. load cell means on the base and supporting the frame; d. indicator means operated by the load cell means; e. at least three wheels for supporting the base; and f. means for moving each base-supporting wheel between an active position in which the base is lifted from an underlying surface and is supported in part by the wheel for travel along said surface, and a retracted position in which the base rests on said underlying surface; said moving means including, for each wheel: 1. means connecting the base and the wheel including an over-center linkage, and means limiting the linkage movement in one direction to establish said active position; and 2. means for applying an operating force to said linkage.
Claim 13
Dependent Claim
35 words
A movable weighing scale as in claim 8, in which: a. said connecting means includes: 1. a spindle connected to the wheel and rotatable about a vertical axis; 2. a sleeve receiving said spindle; and
Claim 14
Dependent Claim
79 words
means on the base guiding the sleeve for movement between an active position in which the wheel engages an underlying surface and supports the base, and a retracted position in which the base rests on said underlying surface; and b. said over-center linkage includes: 1. a first link pivotally connected at one end to the base; 2. a second link pivotally connected at one end to the sleeve; and 3. means pivotally connecting the other ends of said links.
Claim 15
Dependent Claim
79 words
means on the base guiding the sleeve for movement between an active position in which the wheel engages an underlying surface and supports the base, and a retracted position in which the base rests on said underlying surface; and b. said over-center linkage includes: 1. a first link pivotally connected at one end to the base; 2. a second link pivotally connected at one end to the sleeve; and 3. means pivotally connecting the other ends of said links.
Claim 16
Dependent Claim
26 words
A movable weighing scale as in claim 8, in which said force applying means comprises a handle detachable from and attachable to one of said links.
Claim 17
Dependent Claim
50 words
A movable weighing scale as in claim 8, including: a. a pair of wheels at opposite sides of the base; b. a pair of said connecting means for said pair of wheels; and c. a transverse link pivoted at its ends to the two connecting means for concurrent operation thereof.
Claim 18
Dependent Claim
41 words
A movable weighing scale as in claim 11, in which: a. each said over-center linkage includes: 1. a first link pivotally connected at one end to the base; 2. a second link pivotally connected at one end to a wheel; and
Claim 19
Dependent Claim
90 words
means pivotally connecting the other ends of said links; and b. said means for applying an operating force includes: 1. a handle attachable to and detachable from one link; 2. first handle attaching means on the first link at one side of the base; and 3. second handle attaching means on the second link at the other side of the base; 4. so that when said handle is operated in a given sense on either side of the base, it produces vertical motion of the wheel in the same sense.
Claim 20
Dependent Claim
90 words
means pivotally connecting the other ends of said links; and b. said means for applying an operating force includes: 1. a handle attachable to and detachable from one link; 2. first handle attaching means on the first link at one side of the base; and 3. second handle attaching means on the second link at the other side of the base; 4. so that when said handle is operated in a given sense on either side of the base, it produces vertical motion of the wheel in the same sense.
References Cited (Backward Citations)
US2358770A
Cited
US3431992A
Cited
US3530949A
Cited
US3630299A
Cited
DE2212292A1
Cited
US3961675A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |